Table of Contents | July 2022 i
This Guide...
does not provide full legal interpretation of Cal/OSHA
regulations or their underlying statutes.
Readers should refer directly to Cal/OSHA title 8
regulations in the California Code of Regulations (
) and to the California
Labor Code (
) for detailed information regarding the scope,
specications, and exceptions of a particular regulation
and for other requirements that may be applicable to
their operations.
http://leginfo.legislature.ca.gov/faces/codes.
xhtml
www.
dir.ca.gov/samples/search/query.htm
Publications Unit—Updated July 2022
Produced by the California Department of Industrial
Relations (DIR), Division of Occupational Safety and Health
(Cal/OSHA).
Copyright © 2022 State of California, Department of
Industrial Relations. Permission granted to display,
perform, reproduce and distribute exclusively for nonprot
and educational purposes, and may not be used for any
commercial purpose. All other rights reserved.
To obtain copies of Cal/OSHA safety and health publications,
contact a Cal/OSHA Consultation Services oce listed in the
back of this booklet, or go to
.www.dir.ca.gov/dosh/puborder.asp
Table of Contents
About This Pocket Guide 5. . . . . . . . . . . . . . . . . . . . .
Workplace Safety and Health 5. . . . . . . . . . . . . . . . . .
Access 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Administrative Requirements 7. . . . . . . . . . . . . . . . . . .
Aerial Devices and Elevating Work Platform Equipment 12. . . .
Airborne Contaminants and Dust 13. . . . . . . . . . . . . . .
Air Compressors 14 . . . . . . . . . . . . . . . . . . . . . . . .
Asbestos 14 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blasting (Abrasives/Sand) 19 . . . . . . . . . . . . . . . . . . .
Blasting (Explosives) 19. . . . . . . . . . . . . . . . . . . . . .
Carcinogens 21. . . . . . . . . . . . . . . . . . . . . . . . . .
Code of Safe Practices 21. . . . . . . . . . . . . . . . . . . . .
Competent Person 22. . . . . . . . . . . . . . . . . . . . . . .
Concrete Construction 22 . . . . . . . . . . . . . . . . . . . . .
Conned Spaces 27. . . . . . . . . . . . . . . . . . . . . . . .
Corrosive Liquids 31. . . . . . . . . . . . . . . . . . . . . . . .
Cranes 31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Demolition 40. . . . . . . . . . . . . . . . . . . . . . . . . . .
Dust, Fumes, Mists, Vapors, and Gases 42. . . . . . . . . . . .
Electrical 43 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Elevators, Lifts, and Hoists 48. . . . . . . . . . . . . . . . . . .
Emergency Medical Services 49. . . . . . . . . . . . . . . . .
Engine Exhaust Emission 50. . . . . . . . . . . . . . . . . . .
Erection and Construction 51. . . . . . . . . . . . . . . . . . .
Ergonomics in Construction 54. . . . . . . . . . . . . . . . . .
Excavation, Trenches, and
Earthwork 56. . . . . . . . . . . .
Explosion Hazards 65. . . . . . . . . . . . . . . . . . . . . . .
Fall Protection 66. . . . . . . . . . . . . . . . . . . . . . . . .
Fire Protection and Prevention 71. . . . . . . . . . . . . . . . .
ii Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Table of Contents | July 2022 iii
First Aid 72. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flaggers 72. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flammable and Combustible Liquids 73. . . . . . . . . . . . .
Forklifts 74. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Forms, Falsework, and Vertical Shoring 77 . . . . . . . . . . . .
Guardrails 78. . . . . . . . . . . . . . . . . . . . . . . . . . .
Hazard Communication Program
(HAZCOM) 81. . . . . . . .
Heat Illness Prevention 83. . . . . . . . . . . . . . . . . . . . .
Heavy Construction Equipment 90. . . . . . . . . . . . . . . .
Hot Pipes and Hot Surfaces 93. . . . . . . . . . . . . . . . . .
Housekeeping/Site Cleaning 94. . . . . . . . . . . . . . . . . .
Injury and Illness Prevention Program 94. . . . . . . . . . . . .
Ladders 96. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Laser Equipment 102. . . . . . . . . . . . . . . . . . . . . . .
Lead 103. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lighting 106. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lock-out/Block-out Procedures 107. . . . . . . . . . . .
Machine Guarding 110. . . . . . . . . . . . . . . . . . . . . .
Multi-Employer Worksites 110. . . . . . . . . . . . . . . . . .
Personal Protective Equipment 111. . . . . . . . . . . . . . . .
Pile Driving 113. . . . . . . . . . . . . . . . . . . . . . . . . .
Pressurized Worksites 115 . . . . . . . . . . . . . . . . . . . .
Qualied Person 116. . . . . . . . . . . . . . . . . . . . . . .
Ramps and Runways 117. . . . . . . . . . . . . . . . . . . .
Roong Operations 117. . . . . . . . . . . . . . . . . . . . . .
Scaolds 122 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Silica Dust 137. . . . . . . . . . . . . . . . . . . . . . . . . .
Stairways 138. . . . . . . . . . . . . . . . . . . . . . . . . . .
Temporary Agencies 139 . . . . . . . . . . . . . . . . . . . . .
Toeboards 140. . . . . . . . . . . . . . . . . . . . . . . . . .
Toilets/Washing Facilities/
Sanitation 141. . . . . . . . . . . .
Tools and Equipment 142. . . . . . . . . . . . . . . . . . . . .
Trac Control 149. . . . . . . . . . . . . . . . . . . . . . . .
Training 150. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tunnels and Tunneling 151. . . . . . . . . . . . . . . . . . . .
Welding, Cutting, and Other Hot Work 154. . . . . . . . . . . .
Wildre Smoke 157. . . . . . . . . . . . . . . . . . . . . . . .
Wood Preservative Chemicals 158 . . . . . . . . . . . . . . . .
Work Over or Near Water 158. . . . . . . . . . . . . . . . . .
List of Acronyms 160 . . . . . . . . . . . . . . . . . . . . . . .
Index 163 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
About This Pocket Guide | July 2022 5
About This Pocket Guide
The construction industry involves many types of work activities
covered by numerous regulations in title 8 of the California Code
of Regulations (T8 CCR). T8 CCR contains detailed information
on regulations and workplace safety programs, including
specications and exceptions. Construction employers may
have requirements in the Construction Safety Orders (CSOs),
Electrical Safety Orders (ESOs), Tunnel Safety Orders (TSOs),
Compressed Air Safety Orders (CASOs), and the General
Industry Safety Orders (GISOs).
To assist the construction industry in working safely and
complying with title 8 regulations, the Cal/OSHA Publications
Unit has updated this Pocket Guide. This guide is intended to
be used as a reference for workers, employers, supervisors, job
stewards, safety personnel, and others. This Pocket Guide:
• Summarizes safety requirements from T8 CCR that apply
to the construction industry. It is not meant to be either a
substitute for or a legal interpretation of the occupational
safety and health regulations in T8 CCR (see T8 CCR for
detailed information).
• Lists the major subject headings in alphabetical order in
the Table of Contents, and each subject heading is linked
to its content.
• Provides highlights of selected safety standards in each
major subject heading within its scope and may also
include best practices in safety and health.
• Is not all-inclusive. The contents under the bullets,
lists, notes, and exceptions are highlights of regulatory
requirements, best practices, and other construction
safety and health information. Readers should refer
directly to T8 CCR for complete information.
• Contains abbreviations as described in the List of
Acronyms section. It is available in PDF format and can
be printed online.
Workplace Safety and Health
Proactive safety and health programs are an eective way to
prevent workplace injuries and illnesses and reduce the costs
of doing business. In such programs, employers and employees
work together to ensure that safety and health are always part of
the decisions made and all employees and supervisors are fully
6 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Administrative Requirements | July 2022 7
trained to work safely. The benets of eective, proactive safety
programs include
• higher productivity and employee morale,
• higher quality of work and products produced,
• fewer worker injuries,
• lower compensation insurance cost and absenteeism, and
• lower employee turnover.
A written Injury and Illness Prevention Program (IIPP) should be
the foundation for all of your other safety and health programs
and is required for every workplace regulated under T8 CCR. A
summary of the basic elements of an IIPP has been included
in the Injury and Illness Prevention Program section of this
guide. Employers are also encouraged to use Cal/OSHA’s
IIPP resources (www.dir.ca.gov/dosh/PubOrder.asp#IIPP) to
develop a specic IIPP tailored to their own workplaces.
Remember, the eectiveness of all your safety programs depend
on how well you actually implement and maintain them. You must
regularly review and update your programs in order to keep them
eective. Employers and employees must also remember that
the regulations in T8 CCR only set minimum requirements and
they should strive to exceed the standards at all times.
For safety- and health-related assistance, employers and
employees may contact the nearest Cal/OSHA Consultation
Oce listed on the back cover of this guide.
Access
The employer must provide safe access to and from all work
levels or surfaces. Regulated means of access are as follows:
A. Stairways, ramps, or ladders must be provided at all points
where a break in elevation of 18 inches or more occurs in a
frequently traveled passageway, entry, or exit. 1629(a)(3)
B. Aerial devices, such as cherry pickers and boom trucks, may
be vehicle-mounted or self-propelled and used to position
employees, tools, and materials. 3637, and 3648
C. Elevating work platforms, such as vertical towers and scissor
lifts, are designed to raise and hold a work platform in a
substantially vertical axis. 3637, and 3642
D. Industrial trucks, such as rough terrain forklifts, may be used
to elevate and position workers under specic conditions. 3657
E. Elevators (construction) are required as follows:
1. For structures or buildings 60 ft. or more above ground
level or 48 ft. below ground level. 1630(a)
2. At demolition sites of seven or more stories or 72 ft. or
more in height. 1735(r)
Note: Elevators must be inspected and tested in the
presence of a DOSH representative before use. A permit
from DOSH is required before operating. 1604.29(a)
F. Personnel hoists may be used at special construction sites,
such as bridges and dams, if approved by a registered
engineer. 1604.1(c)
G. Ladders can be used to gain access to working surfaces
above and below ground level under certain conditions. 1675
H. Ramps and runways provide means of access for foot or
vehicle trac. 1623, 1624, and 1625
I. Stairways must be installed in buildings that have two or
more stories or are 24 ft. or more in height. 1629(a)(1)
1. For buildings of two or three stories, at least one stairway
is required. 1629(a)(4)
2. For buildings of more than three stories, two or more
stairways are required. 1629(a)(4)
J. The following routes of access are prohibited:
1. Endless belt-type manlifts. 1604.1(a)(3)
2. Single-cleat ladders more than 30 ft. or double-cleat
ladders more than 24 ft. long. 1629(c)
3. Cleats nailed to studs. 1629(b)
4. Rides on loads, hooks, slings, or concrete buckets of
derricks, hoists, or cranes. 1718(a), and 1720(c)(3)
Administrative Requirements
Employers must meet certain administrative requirements
that may include Cal/OSHA notication, specic registration,
permitting, certication, recordkeeping, and the posting of
information in the workplace. Some of these requirements
depend on the construction trade or type of activity in which
employers are involved. The more common requirements are
listed below:
A. Documents required at the job site include the following:
8 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Administrative Requirements | July 2022 9
1. Injury and Illness Prevention Program: Program document
may be kept in the oce. 1509(a), and 3203(a)
2. Code of Safe Practices. 1509(b)
3. All Cal/OSHA-required permits. 341
4. All Cal/OSHA-required certications. Various
5. Respiratory Protection Program for all work sites where
respirators are mandatory. 5144(c)
6. Heat illness prevention. 3395
7. Fall protection plan, if required. 1671.1
B. Postings required at the job site include the following:
1. Cal/OSHA poster “Safety and Health Protection on the
Job.” 340
2. Code of Safe Practices. 1509(b), and (c)
3. Emergency phone numbers. 1512(e)
4. Employee access to records notication to inform
employees that they have the right to gain access to
medical and exposure records. 3204(g)
5. Operating permit for air tanks. 461(a)
6. Operating rules for industrial trucks and tow tractors (if
used), where employees operate forklifts. 3664, and
3650(c)
7. Authorized access at controlled access zones (CAZs).
1671.1, and 1671.2
8. Variance process. 411.3
9. Cal/OSHA registration. 341.4, and 341.10
10. Citations. 332.4
11. Hazard warning signs at the following job sites:
a. Where asbestos work is being done. 341.10, and
1529(k)
b. Where lead work is being done. 1532.1(m)
c. At conned spaces. Article 37, 5158
d. At controlled access zones. 1671.2
e. On cranes, concrete pumps, high-lift trucks, etc., (high-
voltage warning signs). 2947, Group 13
f. On powder-actuated tools. 1691(n)
g. On lasers (laser levels, etc.). 1801(d)
h. On air compressors with an automatic-start function.
3320
C. Recordkeeping requirements are included in T8 CCR for the
purpose of establishing a historical record of compliance.
These requirements include the following:
1. Cal/OSHA Log 300.
Note: You can download a package of forms and instructions
for Log 300 recordkeeping from the Cal/OSHA Publications
webpage at www.dir.ca.gov/dosh/dosh_publications/
RecKeepOverview.pdf.
2. Lock-out/block-out activity records. 3314
3. Operation and maintenance activity records. 1509, and
3203
4. Medical surveillance program and records.
5. Training records.
6. Inspection records.
D. Reports and notications to Cal/OSHA must be made of the
following incidents and activities:
1. Serious injury or illness, or death. A report must be made
immediately by telephone (within 8 hours) to a district
oce. Employers are allowed 24 hours if they can show
that circumstances prevented the report from being made
within 8 hours. 342(a)
Note: A serious injury or illness is dened as one that
requires inpatient hospitalization for other than medical
observation or diagnostic testing, or when an employee
suers an amputation, the loss of an eye, or any serious
degree of permanent disgurement. 330(h)
2. Blasting accidents or unusual occurrences. A report must
be forwarded to the district oce within 24 hours. 5248(a)
3. Construction activities annual permit. Employers governed
by an annual permit must notify DOSH before starting the
work. 341.1(f)
4. Asbestos-related work. The DOSH district oce must be
notied 24 hours before starting work that is subject to
registration. 341.9(a)
10 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Administrative Requirements | July 2022 11
5. Use of regulated carcinogens. The employer must report
operations involving the use of a regulated carcinogen
within 15 days. 5203
6. Construction involving lead-work. Written notication
must be made to the DOSH district oce 24 hours before
starting work. 1532.1(p)
E. Employers should promptly notify aected employees of the
monitoring results of ANY required monitoring for regulated
substances. Such notications must be made within the
required time frame. Some common substances requiring
notication include:
1. Asbestos, methylenedianiline, cadmium, chromium (VI),
and lead: Notify within 5 working days following receipt of
monitoring results. 1529(f)(5)(A), 1535(f)(7)(A), 1532(d)
(5)(A), 1532.2(d)(4)(A), 1532.1(d)(8)(A)
2. Vinyl chloride: Notify within 15 working days following
receipt of monitoring results. 5190(d)(4)(A), 5210(d)(6)
3. Formaldehyde: Notify within 15 days following receipt of
monitoring results. 5217(d)(6)
F. Project or Annual permits issued by Cal/OSHA are required
for various construction activities. 341
A Project Permit is required for: 341(d)
• Use of diesel engines in any mine or tunnel.
• Demolition or dismantling of a structure more than 36 ft.
high. 341(d)(3)
• Erecting/raising/lowering or dismantling a xed tower
crane.
An Annual Permit is required for employers when the
structure is over 36 ft. high and employers are engaged in
the following activities: 341(d)(4)
• Erection and placement of structural steel or structural
members other than steel.
• Installation of curtain walls/precast panels or fascia.
• Installation of metal or other decking.
• Forming or placement of concrete structures/decks on
steel structures.
• Installation of structural framing (including roof framing) or
panelized roof systems.
Annual or Project Permit is needed for:
• Construction of trenches or excavations 5 ft. or deeper
into which a person is required to enter.
• Erection and placement of scaolding, vertical shoring, or
falsework more than 36 ft. high.
Operating permit is required for:
• Operating specied air compressors. 461
• Operating tower cranes if the employer is subject to
341, 341.1, and 344.70.
Note: Most permits can be obtained from a DOSH district
oce. A safety conference and a review of the employer’s
safety program will be scheduled before permit issuance.
341.1(c)
Exception: Permit requirements do not apply to certain
activities. See 341(e).
G. Certication requirements are necessary in the following
circumstances:
1. Power operated cranes and derricks exceeding 3 tons
rated capacity shall not be used in lifting service until the
equipment has been certied by a DOSH licensed certier.
1610.9
2. Operators of mobile and tower cranes must have a valid
certicate. See exceptions. 1618.1
3. Asbestos consultants and site surveillance technicians
must be certied by DOSH. 341.15
4. Training certication is required for many activities and
trades (see specic Safety Orders). title 8
H. Registration and licensing are required in the following
circumstances:
1. Asbestos registration. An employer must register with
DOSH when engaged in asbestos-related work on 100 sq.
ft. or more of surface area. 341.6
2. Blaster’s License. The blaster must be a licensed blaster
or directed by a licensed blaster and be at least 21 years
of age. 5238
12 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Airborne Contaminants and Dust | July 2022 13
Aerial Devices and Elevating Work
Platform Equipment
A. Aerial devices, such as cherry pickers and boom trucks, may
be vehicle-mounted or self-propelled and used to position
employees. 3637
General safety requirements are as follows: 3648
1. Only authorized persons may operate aerial devices.
3648(c)
2. Aerial devices must not rest on any structure. 3648(a)
3. Controls must be tested before use. 3648(b)
4. Workers must stand only on the oor of the basket. No
planks, ladders, or other means are allowed to gain
greater heights. 3648(e)
5. A fall protection system must be worn and attached to the
boom or basket. 3648(o)
6. Brakes must be set when employees are elevated.
3648(g)
7. An aerial lift truck must not be moved when an employee
is on the elevated boom platform except under conditions
listed in 3648(l).
B. Elevating work platform equipment, such as vertical tower,
scissor lift, and mast-climbing work platform, may be used to
position employees and materials 3642.
General safety requirements are as follows: 3642
1. The platform deck shall be equipped with a guardrail or
other structure around its upper periphery. Where the
guardrail is less than 39 inches high, a personal fall
protection system is required. 3642(a)
2. The platform shall have toeboards at sides and ends.
3642(f)(1)
3. No employee shall ride, nor tools, materials, or equipment
be allowed on a traveling elevated platform. See
exceptions. 3646
4. Units shall not be loaded in excess of the design working
load. 3646(f)
C. The following information must be displayed on the device:
3638(c)
1. Manufacturer’s name, model, and serial number.
2. Rated capacity at the maximum platform height and
maximum
platform travel height.
3. Operating instructions.
4. Cautions and restrictions.
D. Devices must be designed to applicable American National
Standards Institute (ANSI) standards. 3638(b)
Note: See clearances for operations near high-voltage
conductors in the Electrical section of this guide.
Airborne Contaminants and Dust
The employer must control employees’ exposures to airborne
contaminants and employees’ skin contact with those
substances identied in Table AC-1 of 5155 and 1528. Airborne
contaminants suspended in the air can exist in dierent forms,
including gases, vapors, and particulates (particles of either
liquids or solids). Table AC-1 contains the Permissible Exposure
Limits (PELs) for these substances. The PEL applies to the sum
of the exposures to the substance in the vapor state and from
the particulate fraction. 5155
Some of the substances listed in Table AC-1 also have specic
performance standards, noted in the CSOs and the GISOs,
for controlling employee exposure. These substances include
asbestos (1529); cadmium (1532); lead (1532.1); benzene
(5218); methylenedianiline (1535); beryllium (1535.1); concrete
and masonry materials (1530.1); chromium (VI) (1532.2);
respirable crystalline silica (1532.3); carbon monoxide (5155);
internal combustion engines (1533), vinyl chloride (5210); and
welding fumes (1536, 1537).
Airborne contaminants must be controlled by: 5141
• Applying engineering controls.
• Removing employees from exposure to the hazard and by
limiting the daily exposure of employees to the hazard.
• Providing respiratory protective equipment whenever such
engineering controls are not practical or fail to achieve full
compliance.
Note: Check Table AC-1 frequently as the content is regularly
updated; and employers must display the required warning signs in
work areas where hazardous contaminants and dust are present.
14 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Asbestos | July 2022 15
Air Compressors
General requirements for air compressors include:
A. Employers must obtain a DOSH permit for the air tanks of air
compressors operated at a work site. 461(a)
Exception: No permit is required for tanks equipped with a
safety valve set to open at no more than 15 psi pressure, or
tanks having a volume of 1 1/2 cu. ft. or less with a safety
valve set to open at no more than 150 psi. 461(f)
B. Warning signs are required for electric air compressors
equipped with an automatic-start function. 3320
C. Safety valves must be popped weekly. 1696(d)
D. Air tanks must be drained per manufacturer’s
recommendation. 1696(c)
E. Fans shall be guarded with a shroud or side screens.
1696(b)
F. Portable air compressors on wheels must be prevented from
rolling. 1696(a)
Asbestos
The word “asbestos” refers to six naturally occurring, brous,
hydrated mineral silicates that dier in chemical composition.
They are actinolite, amosite, anthophyllite, chrysotile, crocidolite,
and tremolite. Nonbrous forms of the last three minerals
listed here are regulated by GISO 5208.1. You may encounter
asbestos at a construction site in the following applications and
areas:
• Excavations where asbestos-bearing rock outcroppings
are at or near the surface.
• Fireproong for steel-frame high-rise buildings.
• Pipe and boiler insulation.
• Insulators of electrical conductors.
• Plaster, cement, drywall, and taping compounds.
• Floor tile and tile adhesives.
• Acoustical ceilings (tiles and sprayed on).
• Asbestos-cement piping, shingles, and panels.
• Roong felt and sealing compounds.
Because asbestos exposure has been linked to serious
illnesses, Fed/OSHA and Cal/OSHA have implemented strict
regulations to minimize exposures to work site and “take-home”
asbestos. Below is a summary of regulatory requirements:
A. Construction projects are subject to regulation under 1529 if
they involve one or more of the following activities, regardless
of the percentage of asbestos present:
1. Demolition or salvage of structures where asbestos is
present.
2. Removal or encapsulation (including painting) of materials
that contain asbestos.
3. Construction, alteration, repair, maintenance, or
renovation of structures, substrates, or portions thereof
that contain asbestos.
4. Installation of products that contain asbestos.
5. Erection of new and the improvement, alteration, and
conversion of existing electric transmission and distribution
lines and equipment.
6. Excavation that may involve exposure to naturally
occurring asbestos, excluding asbestos mining and milling
activities.
7. Routine facility maintenance.
8. Transportation, disposal, storage, and containment of
and site housekeeping activities involving asbestos or
materials containing asbestos.
9. Asbestos spills and emergency cleanups.
Regulatory requirements for work activities subject to 1529
vary depending on the percent, amount, or type of asbestos-
containing materials involved. Listed below are selected
requirements and the activities to which they apply:
B. Cal/OSHA administrative requirements are as follows:
1. Registration and district oce notication if disturbing 100
sq. ft. or more of manufactured construction materials
containing more than
of 1% of asbestos-containing
construction material (ACCM). 341.6(a)
2. Carcinogen notication with exposures in excess of
permissible exposure limits (PELs).
3. The employer shall notify aected employees of the
16 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Asbestos | July 2022 17
monitoring results of asbestos within 5 working days
following receipt of monitoring results. 1529(f)(5)(A)
4. DOSH certication is required for all persons performing
duties of an asbestos consultant or technician. 341.15(a)
5. “Asbestos consultant” means any person who contracts to
provide professional health and safety services relating to
asbestos. 1529(q)(1)
C. Training is required for all employees engaged in Class
I through IV work and all work in which they are likely to
be exposed in excess of the PELs. The training must be
provided:
1. At the employer’s expense.
2. Before or at the time of initial assignment.
3. Annually after initial training.
4. In accordance with 1529(k)(9).
D. Permissible exposure limits (PELs): The employer must
ensure that employee exposures do not exceed: 1529(c)
1. Eight-hour time-weighted average of 0.1 bers/cc.
2. Thirty-minute excursion limit of 1 ber/cc. 1529(c)
E. Multi-employer work sites are regulated under 1529:
1. The general contractor on the project must exercise
general supervisory authority. 1529(d)
2. An employer performing work that involves asbestos must
notify other employers at the site. 1529(d)
3. All employers on site must ensure that their own
employees are not exposed to asbestos bers due to a
breach in containment or control methods used by the
creating employer. 1529(d)
F. Exposure assessments and monitoring are required as
follows:
1. Initial exposure assessment must be made by all
employers subject to 1529 before or at the onset of the
project. 1529(f)(2)
2. Daily exposure monitoring of employees must be
conducted by all employers disturbing materials that
contain more than 1% asbestos in Class I and II work.
1529(f)(3)
3. All employers must monitor daily representative exposure
of employees performing Class I and II work.
Exceptions 1529(f)(3):
No monitoring required when:
»The employer has made a negative exposure
assessment for the entire operation.
» Employees are equipped with supplied-air respirators
(SARs) operated in the pressure demand mode, or other
positive pressure mode respirator. However, employees
performing Class I work using certain control methods
shall be monitored daily even if they are equipped with
SARs.
4. Periodic exposure monitoring of employees must be
conducted when disturbing asbestos-containing materials
(ACMs) in operations involving other than Class I and II
work during which the PELs might be exceeded.
1529(f)(3)
G. Respirator protection requirements are specic to asbestos-
related activities and exposures, as outlined in 1529(h):
1. The employer must provide appropriate respirators to
employees; however, employers shall not use ltering
facepiece respirators for protection against asbestos
bers. 1529(h)(3)
2. The appropriate respirator must be selected from Table 1
of 5144(d)(3)(A)(1) and 1529(h).
3. The employer must provide HEPA lters for powered and
non-powered air-purifying respirators. 1529(h)(3)(B)
4. A written respiratory protection program must be
implemented in accordance with 5144(c), 1529(h)(2).
H. Methods of compliance and work practices are noted below:
1. A wet method must be used unless the employer can
demonstrate that it is not feasible. 1529(g)(1)
2. Vacuum cleaners with high-eciency particulate air
(HEPA) lters must be used to clean up ACM and
presumed asbestos-containing material (PACM).
1529(g)(1)
3. Prompt cleanup and disposal in labeled leak-tight
containers are required except as specied in 1529(g)(8)
(B), 1529(g)(1).
18 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Blasting (Abrasives/Sand) | July 2022 19
4. Specic work practices for dierent activities are also
outlined in 1529, 1529(g) (4-11)
5. Stripping of nishes shall be conducted using low
abrasion
pads at speeds lower than 300 rpm and wet
methods. 1529(g)
I. Prohibited work practices and controls are as follows:
1. Spraying of any substance containing any amount of
asbestos (see exception). 1528
2. High-speed abrasive disc saw cutting of ACM or PACM
without appropriate point of cut ventilator or enclosures
with HEPA-ltered exhaust air. 1529(g)(3)
3. Using compressed air to remove asbestos or materials
containing asbestos. 1529(g)(3)
4. Dry sweeping, shoveling, or other dry cleaning of dust or
ACM or PACM debris. 1529(g)(3)
5. Rotating employees as a means of reducing exposure to
asbestos. 1529(g)(3)
J. Employer needs to include asbestos in the HAZCOM
program 5194, regardless of employee airborne exposure
levels, and make sure that: 1529
1. Employees have access to labels (on containers of
asbestos) and safety data sheets.
2. Employees are trained as per 5194 and 1529.
1529(k)(1)(B).
3. Warning signs shown below are displayed at each
regulated area as per 1529(k)(7):
DANGER
ASBESTOS
MAY CAUSE CANCER
CAUSES DAMAGE TO LUNGS
AUTHORIZED PERSONNEL ONLY
4.
Labels on containers for protective clothing and
equipment, scrap, waste, and debris with asbestos bers
show the following information as per 1529(k)(8)(C):
DANGER
CONTAINS ASBESTOS FIBERS
MAY CAUSE CANCER
CAUSES DAMAGE TO LUNGS
DO NOT BREATHE DUST
AVOID CREATING DUST
Blasting (Abrasives/Sand)
Regulations for blasting with abrasives and sand include the
following:
A. Employees must wear supplied-air respirators (covering the
head, neck, and shoulders) during abrasive blasting:
1. When dust may exceed limits specied in 5155,
5151(b)(1)(B).
2. With silica sand or where toxic material evolves.
5151(b)(1)(C)
Note: A dust lter respirator may be used for 2 hours during
abrasive blasting if the concentration of silica dust is less
than ten times the limit specied in 5151(b)(1)(C).
B. Hearing protection must be worn as required by 1521.
C. Body protection must be worn as required by 1522.
Blasting (Explosives)
A person must hold a valid California Blaster’s License and
must be physically present when performing, directing, and
supervising blasting operations. No person under the age of
21 years shall be permitted in any explosive magazine or be
permitted to use, handle, or transport explosives. 5238(a),
5276(g)
Exception: Persons 18 years or older and under the direct
personal supervision of a licensed blaster.
A. Blaster’s License requirements are discussed in 344.20.
B. All blasting accidents aecting worker safety must be
reported to DOSH within 24 hours. 5248(a)
Note: Accidents involving a serious injury or illness must be
reported to DOSH immediately but not longer than 8 hours.
342(a)
20 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Carcinogens | July 2022 21
C. Explosives must be stored in the proper type of magazine
(see 5252 Table EX-1), 5251(a)
D. Caps and detonators must be stored in separate magazines
away from other explosives. 5251(b), (c)
E. Storage requirements are discussed in 5251, 5252, and
5253.
F. Transportation requirements are discussed in Subchapter 7
Article 115 (Index). 5270
G. Safety rules for blasting operations are as follows:
1. No smoking or open ames are permitted within 50 ft. of
explosives handling. 5276(a)
No source of ignition, except during ring, is permitted in
areas containing loaded holes. 5276(a)
Only non-sparking tools are to be used for opening
containers of explosives. 5276(b)
Explosives must be kept clear of electrical circuits by 25 ft.
5276(d)
Unused explosives must be returned promptly to the
magazine. 5276(e)
Blasting mats must be used when ying material could
damage property. 5276(f)
A tally sheet that records all movement of explosives must
be kept at each magazine. 5251(n)
Holes may be loaded only after all drilling is complete.
(see exception in 5278(a), 5278(a))
No vehicle trac should pass over loaded holes. 5278(c)
Loaded holes must be attended. 5278(o)
Workers must not try to quench an explosive’s re. 5276(l)
Explosives at a blast site must be attended. 5278(o)
No one but the attendant(s), the loading/detonation
crew, inspection personnel, and authorized supervisory
personnel shall be allowed within 50 ft. of the loaded
holes. 5278(o)(3), (w)(3)
Blasts shall not be red without the licensed blaster
in-charge verifying the conditions listed in 5291(b), and
without a warning signal/procedure. The signals shall be
heard clearly in areas that could possibly be aected by
the blast. 5291(b)
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
Carcinogens
Whenever carcinogenic (cancer-causing) chemicals, as specied
in the GISOs Article 110 Regulated Carcinogens are present
in construction materials, the employer must comply with the
reporting requirements and safety rules. 5203
A. For all regulated carcinogens that specify a requirement
for the employer to establish a regulated area, use of a
regulated carcinogen within such a regulated area shall be
reported to Cal/OSHA. For regulated carcinogens that do
not have a regulated area requirement, use of the regulated
carcinogen shall be reported in certain circumstances.
5203(c)
B. Initial use/changes in reported information of a regulated
carcinogen shall be reported in writing to Cal/OSHA within 15
days. 5203(d)
C. Employers with temporary worksites need to provide the
initial use/changes report for their permanent workplace
location. 5203(e)
D. A copy of the applicable written report of use, temporary
worksite notication, and emergency report shall be posted
for aected employees to see. 5203(g)
E. In case of an emergency: 5203(f)
• A report of the occurrence of an emergency and the facts
obtainable at that time shall be made to Cal/OSHA within
24 hours.
• A written report shall be led within 15 days.
The safety data sheet (SDS) and labels on the container must be
reviewed to determine the presence of carcinogens.
Code of Safe Practices
The Code of Safe Practices is a set of worksite rules that
stipulate how to perform job duties safely and to keep the work
site safe. The following are selected requirements:
A. The employer must develop and adopt a written Code of
Safe Practices. 1509(b)
Note: Plate A-3 in Appendix A of 1938 is a suggested code.
The code is general and should be used as a starting point
for developing a code that ts the contractor’s operations.
22 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Concrete Construction | July 2022 23
B. It must be specic to the employer’s operations. 1509(b)
C. It must be posted at each job site oce or be readily
available at the job site. 1509(c)
D. Workers, when rst hired, shall be given instructions
regarding the hazards and safety precautions and directed to
read the Code of Safe Practices. 1510(a)
E. Supervisors shall conduct “toolbox” or “tailgate” safety
meetings, or the equivalent, with their crews at least every 10
working days to emphasize safety.
Competent Person
A competent person is dened in 1504(a) as one who is
capable of identifying existing and predictable hazards in
the surroundings or working conditions that are unsanitary or
dangerous to employees. The competent person has authority to
impose prompt corrective measures to eliminate these hazards.
Some SOs identify specic requirements for the competent
person’s training, knowledge, abilities, and duties. The following
is a list of CSOs that require the use of a competent person:
asbestos 1529(o); (2) excavation 1541, 1541.1; (3) cadmium
1532(b); (4) fall protection 1670, 1671.2; (5) bolting and riveting
1716; (6) pressurized worksites 6075; (7) lift-slab construction
operations 1722.1(i); (8) permit-required conned spaces
1952(a); and (9) silica 1532.3(g)(4).
Concrete Construction
Injuries and illnesses common to the concrete construction
industry are as follows:
• Burns, rashes, and skin irritations from exposure to
cement dust or wet concrete.
• Silicosis, a respiratory disease caused by inhaling
silica dust from exposure to concrete dust during such
operations as concrete cutting, drilling, grinding, or
sandblasting.
• Broken bones, lacerations, and crushing injuries caused
by falls from elevated work surfaces; impalement by rebar
or other objects; and impact from falling objects, form and
shoring failure, and structural failure of components of
the project.
Because the hazards associated with concrete construction
are great, employees must use appropriate personal protective
equipment and conform to safe work practices at all times (see
below).
A. Placement of Concrete. 1720
1. Concrete pumping equipment and placing booms shall
be set-up and operated according to manufacturer’s
guidelines and the title 8 safety orders.
2. The manufacturer’s operation manual shall be maintained
in legible condition and available at the job site.
3. Controls in the equipment shall have their function clearly
marked.
4. Operation of concrete placing booms in proximity of
overhead high-voltage lines shall be in accordance with
Article 37 of the High-Voltage Electrical Safety Orders.
5. Equipment shall be inspected by a qualied operator prior
to daily use and the inspection must be documented.
B. Forms/falsework and vertical shoring in the Forms,
Falsework, and Vertical Shoring section of this guide. 1717
C. Masonry construction. 1722
1. All masonry walls more than 8 ft. high must be braced
to prevent overturning and collapse unless the wall is
adequately supported through its design or construction
method. The bracing shall remain in place until permanent
supporting elements of the structure are in place. 1722(b)
2. A limited access zone (LAZ) shall be established
whenever a masonry wall is being constructed and must
conform to the following:
a. The LAZ shall be established before the start of
construction. 1722(a)(1)
b. The LAZ shall be established on the side that does not
have scaolding. 1722(a)(2)
c. The width of the LAZ shall be equal to the height of the
wall to be constructed plus 4 ft. and shall run the entire
length of the wall. 1722(a)(3)
d. The LAZ shall be entered only by employees actively
engaged in constructing the wall. No other employee
shall be permitted entry. 1722(a)(4)
e. The LAZ shall remain in place until the wall is
24 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Concrete Construction | July 2022 25
adequately supported to prevent collapse unless the
height of the wall is more than 8 ft., in which case the
LAZ shall remain in place until the requirements of
1722(b) have been met. 1722(a)(5)
D. Precast, prefabricated concrete construction, tilt-up, panels.
1715
1. An erection plan, addenda, and procedure shall be
prepared by or under the direction of a Professional
Engineer registered in California.
2. The erection plan, addenda, and procedure shall be
available at the job site.
3. Job site inspections shall be made by the responsible
engineer (or representative) during the course of erection.
4. Proposed eld modications shall be approved by the
responsible engineer.
E. Rebar and other impalement hazards. 1711 and 1712
1. Employees working at grade or at the same surface level
as exposed protruding rebar or similar projections shall
be protected against impalement by guarding exposed
ends that extend up to 6 feet above grade or other work
surface, with approved protective covers or troughs (see
Illustrations 1 and 2). 1712(c) and (d)
2. Employees working above grade or above any surface and
who are exposed to protruding rebar or similar projections
shall be protected from impalement by:
a. The use of guardrails, or
b. Approved fall protection systems, or
c. Approved troughs and covers per 344.90, 1712(c) and
(d).
3. Job-built wood protective covers and troughs shall be built
of at least “standard grade” Douglas Fir.
4. Manufactured protective covers shall be approved by
Cal/ OSHA in accordance with 344.90.
5. Personal fall protection (or equivalent) must be used while
employees place or tie reinforcing steel in walls, columns,
piers, and other structures more than 6 ft. high. 1711(i)
Exception: Reinforcing ironworkers may travel point-to -point
horizontally or vertically on reinforcing steel up to 24 ft.
above the surface below if there are no impalement hazards.
Illustration 1 | Troughs
2” x 4”
1” x 6”
2” x 4”
1” x 8”
1 ¹⁄2”
3”
24”
Protruding
Reinforced Steel
14 Gauge Steel Trough
Troughs can be used for impalement protection if the
following apply:
• The trough designs shown above can be used when
employees are working at heights of 6 ft. or less “above
grade.”
• If employees are working at heights above 6 ft., the
design must be specied by an engineer (Ca PE).
• Job-built wood troughs must be constructed of at least
“standard grade” Douglas Fir.
26 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Conned Spaces | July 2022 27
Illustration 2 | Protective Covers
4” square or
4 ½
” diameter
Protruding rebar
or other
impalement hazard
Manufactured protective covers used for impalement
protection must meet the following requirements:
• The protective covers must be Cal/OSHA-approved.
• The cover surface must be at least 4 in. square. If the
cover is round, its surface must have a minimum diameter
of 4 1/2 inches. For a trough, the protective cover must be
at least 4 inches wide.
• The protective covers used “above grade” must be
designed to withstand the impact of a 250-lb. weight
dropped from 10 ft.
• The protective covers used “at grade” must be designed
to withstand the impact of a 250-lb. weight dropped from
7 1/2 ft.
Mushroomed Cap
Mushroomed caps
cannot be used as
impalement protection
Protruding rebar or other
impalement hazard
6. Guying and supporting of all rebar for walls, piers,
columns, and similar vertical structures are required.
7. Wire mesh rolls shall be secured to prevent dangerous
recoiling action. 1711
F. Concrete nishing
1. Powered nishing tools must be equipped with a dead-
man-type control.
2. Bull oat handles must be constructed of a nonconductive
material if they could come into contact with energized
electrical conductors.
Conned Spaces
Every year several conned space entrants and would-be
rescuers die from hazards, such as oxygen deciency, toxic and
explosive atmospheres, engulfment, and uncontrolled energized
equipment. To prevent such accidents, employers must be able to:
• Recognize conned spaces and which of them are permit-
required conned spaces.
• Know, understand, and eectively implement T8 CCR
Article 37 (1950-1962) and 5158 requirements. Section
5158 contains certain requirements not found in Article
37.
A. A conned space is dened in 1951 as a space that exhibits
the following characteristics:
1. Is large enough and so congured that an employee can
bodily enter it.
2. Has limited or restricted means for entry and exit.
3. Is not designed for continuous employee occupancy.
B. The following are examples of some of the locations that may
exhibit conned-space conditions. 1950(a):
1. Pits (such as elevator, escalator, pump, valve, or other
equipment)
2. Manholes (such as sewer, storm drain, electrical,
communication, or other utility)
3. Tanks (such as fuel; chemical; water; or other liquid, solid,
or gas)
4. Concrete pier columns
28 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Conned Spaces | July 2022 29
5. Sewers
6. Storm drains
7. Enclosed beams
8. Vessels
9. Cesspools
10. Turbines
C. A permit-required conned space is dened in 1951 as a
conned space that also has one or more of the following
characteristics:
1. Contains or has a potential to contain a hazardous
atmosphere.
2. Contains a material that has the potential for engulng an
entrant.
3. Has an internal conguration such that an entrant could
be trapped or asphyxiated by inwardly converging walls or
by a oor that slopes downward and tapers to a smaller
cross-section.
4. Contains any other recognized serious safety or health
hazard.
D. Before starting work at a worksite, the employer must have a
competent person identify all conned spaces and permit-
required conned spaces in which the employer’s employees
might work. 1952(a)
E. Exposed employees at the worksite must be informed
of any permit spaces by posting danger signs or by any
other equally eective means. Employees’ authorized
representatives and the controlling contractor must also be
informed—by other than posting—of the existence, location,
and danger posed by each permit space. 1952(b)
F. Whenever possible, employees should avoid entering these
spaces or use equipment that allows work to be done from
the outside. If employees must enter:
1. The employer must comply with the applicable Cal/OSHA
regulations in T8 CCR. These include:
• Section 1509 (Injury and Illness Prevention Program)
• Article 6 (Excavations)
• Article 37 (Conned Spaces in Construction) of the
Construction Safety Orders
• Section 5158 (Other Conned Space Operations)
• Sections 2943(b) and 2943.1 (High Voltage Electrical
Orders—Enclosed Spaces)
2. All aected employers are required to have a written
permit space program that complies with section 1953. In
general, the employer must have:
• Procedures to identify and evaluate all permit-required
conned spaces before employees enter them.
• Measures to prevent unauthorized entry into permit
spaces.
• A system for preparing, issuing, using, and canceling
entry permits.
• Procedures to test and monitor the permit spaces
before and during all employee entries.
• Procedures to have an attendant outside the permit
space at all times while employees are working inside.
• Eective controls of all existing and potential
atmospheric and/or physical hazards inside the permit
space.
• Appropriate equipment (testing and monitoring tools,
ventilation, PPE, lighting, rescue tools, etc.).
• Employee and supervisor training on safe work
procedures, hazard identication and controls, and
rescue procedures.
• Eective rescue and emergency procedures that are
immediately available on site.
• Procedures to coordinate entry operations when
employees of more than one employer enter the permit
space.
Note:
(1) This is just a partial list of the requirements of a permit
space program.
(2) Refer to section 1952 for details on when permit-
required conned spaces can be “reclassied” as
non-permit, or permit-required conned spaces can be
entered via “alternate procedures.”
(3) Refer to section 1950 for details on the scope and
application of Article 37, including the following
exceptions:
30 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Corrosive Liquids | July 2022 31
a. Construction work regulated by Construction Safety
Orders, Article 6, Excavations. However, a conned
space created within an excavation (e.g., a pipe or
other structure) may constitute a permit-required
conned space covered by Article 37 requirements.
b. Construction work regulated by the Tunnel Safety
Orders. However, a conned space created within a
tunnel (e.g., a pipe or other structure) may constitute a
permit-required conned space covered by Article 37
requirements.
c. Construction work regulated by General Industry Safety
Orders, Group 26, Diving Operations.
d. Construction work regulated by the General Industry
Safety Orders, Article 154, Pressurized Worksite
Operations.
(4) Section 5157 describes permit-required conned space
requirements for non-construction operations.
Illustration 3 | Retrieval Equipment in Use
Corrosive Liquids
Employers must provide the following when employees handle
corrosives:
• Personal protective equipment. 1514(a)
• Safety data sheets (SDS) in English. 5194(g)
• Properly labeled containers with appropriate hazard
warnings. 5194(f)
Note: Employers who become newly aware of any signicant
information regarding the hazards of a chemical shall revise
the labels for the chemical within six months of becoming
aware of the new information. 5194(f)(11)
• An eyewash and a deluge shower that meet ANSI
standards. 3400(d), 5162
Note: Emergency eyewash facilities and deluge showers
shall be in accessible locations that require no more than 10
seconds for the injured person to reach.
• A written hazard communication (HAZCOM) program.
5194(e)
Cranes
Hazards that are associated with crane operations include
electrocution from overhead power lines and equipment failures
because of operator error; faulty or damaged equipment;
overloading; support failure such as ground or outrigger
collapse; and miscommunication.
All of the regulations for cranes used in construction are
covered in T8 CCR sections 1610–1619, 1694, 2940, and 6060.
1610–1619 covers Cranes and Derricks in Construction, 1694
covers Side Boom Cranes, 2940 covers Mechanical Equipment,
and 6060 covers Procedures During Dive. For requirements/
details on cranes and derricks in construction, refer to the
above sections.
To maintain safe and healthful working conditions, employers
and employees must ensure that:
1. All requirements, including prohibitions, are met.
2. Manufacturer’s instructions are followed.
3. All crane operators have a valid certicate of competency
32 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Cranes | July 2022 33
for the specic type of crane that they are operating.
4. Necessary tools, protective equipment, and trainings are
provided.
5. Employees comply with all requirements of crane
operation and perform tasks safely at all times.
Below is a summary of the regulatory requirements for cranes
and derricks used in construction:
A. General requirements for cranes and derricks are given in
sections 1610.1–1610.9. Requirements include:
1. Scope applies to power operated equipment when used in
construction that can hoist, lower and horizontally move a
suspended load. 1610.1
2. Design requirements are given in 1610.2 and 4884.
3. Denitions as per 1610.3.
4. Design, construction, and testing of cranes and derricks
with over 2,000 lbs. of hoisting/lifting capacity must meet
requirements in 1610.4.
5. Ground conditions, including slope, compaction, and
rmness, and all supporting materials, such as blocking,
mats, cribbing, marsh buggies, etc., must meet the
requirements in 1610.5.
6. Equipment modications or additions that aect the
capacity or safe operation of the equipment are prohibited
except where the requirements of subsections as shown in
1610.6 are met.
7. Fall protection is critical in crane operations and must be
provided by employers. The fall protection system varies
depending on the type of crane being used and the work
activity. Requirements for fall protection are given in
1610.7.
8. For cranes with a rated hoisting/lifting capacity of 2,000
lbs. or less, the employer must ensure that all of the
requirements in 1610.8 are met.
9. For cranes with a rated hoisting/lifting capacity over
3,000 lbs., the employer must ensure that the cranes,
derricks, and accessory gears are not used until there is a
verication of current certication as per 1610.9.
10. A copy of the current certication must be available with
each crane and derrick or at the project site. 1610.9(a)
11. Proof load tests and examinations of cranes and
their accessory gear must be conducted as per 5022,
1610.4(f).
12. Do not operate cranes with wheels or tracks o the ground
or working surface at any time unless properly bearing on
outriggers or stabilizers. 4994(a)
B. Sections 1611.1 through 1611.5 address all of the safety
requirements related to assembly and disassembly
operations.
1. When assembling or disassembling equipment (or
attachments), the employer must comply with all
applicable manufacturer prohibitions and requirements in
1611.1.
2. The general requirements for assembly and disassembly
operations, including supervision, review of procedures,
crew instructions, etc., are given in 1611.2.
3. Employers/operators must also follow the requirements for
dismantling booms and jibs as specied in 1611.3.
4. Employer procedures for assembly/disassembly shall be
developed by a qualied person. 1611.4
5. The employer shall follow the power line safety (up to 350
kV) requirements of 1611.5. Employers and employees
always need to presume that power lines are energized.
C. Power line safety is regulated under T8 CCR subsections
1612.1 through 1612.4. The requirements vary depending on
the voltage of the power line. The following requirements apply:
1. For equipment operations with potential involvement of
power lines up to 350 kV, the employer shall follow the
power line safety requirements of T8 CCR 1612.1.
2. For power lines over 350 kV, the employer shall follow all of
the requirements of 1611.5 and 1612.1. See exceptions.
3. For all energized power lines (all voltages), whenever
equipment operations, including load lines or loads, are
closer than the minimum approach distance under Table A,
the employer shall prohibit these operations. 1612.3
4. Unless the overhead high-voltage power lines are de-
energized and visibly grounded, the operation, erection,
or handling of tools, machinery, apparatus, supplies,
or materials, or any part thereof over the power lines is
prohibited. 1612.3(b)
5. If equipment travels under or near power lines with no
34 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Cranes | July 2022 35
load, the employer must establish procedures and criteria,
and follow the safety requirements of T8CCR 1612.4.
D. Requirements for inspections and repairs of cranes and
derricks are given in T8 CCR sections 1613.1 to 1613.12.
Specic requirements include the following:
1. Prior to initial use, all equipment that has modications or
additions that aect the safe operation of the equipment
or capacity shall be inspected by a certicating agency.
The inspection shall meet the requirements of T8 CCR
1613.1.
2. Inspections of repaired/adjusted equipment are subject to
the requirements in 1613.2.
3. Post-assembly inspections are subject to the requirements
in 1613.3.
4. The inspections conducted on each shift are subject to the
requirements in 1613.4.
5. Periodic inspections shall be conducted at least four times
a year. Cranes shall not be operated more than 750 hours
between periodic inspections. The inspection shall include
all items as per 1613.5.
6. Annual/comprehensive inspections need to be done as per
1613.6.
7. Where there is a reasonable probability of damage
or excessive wear, the employer shall stop using the
equipment and a qualied person shall inspect the
equipment for structural damage, which must be
evaluated by the certicating agency. 1613.7
8. Equipment that has been idle for 3 months or more shall
be inspected by a certicating agency or qualied person
as per T8 CCR 1613.5 before initial use. 1613.8
9. General inspections must comply with 1613.9.
10. Inspections of wire ropes are subject to the requirements
of 1613.10.
11. Repairs to load-sustaining members and other critical
crane and derrick parts, including booms, must be
performed as per the provisions of GSO. 1613.11,
1613.12
E. Requirements for the selection and installation of wire ropes
are given in 1614. Selection and installation of original
and replacement wire rope shall be in accordance with the
wire rope manufacturer, the equipment manufacturer, or a
qualied person.
F. Do not load slings and shackles beyond the rated capacities
provided by the manufacturers. Do not use them without
axed and legible identication markings. 5042(a), 5049(g)
Requirements for the safety devices and operational aids are
given in sections 1651.1 and 1615.2:
1. Safety devices such as crane level indicator, horn, jib
stops, boom stops, etc., are required on all equipment
unless otherwise specied. 1615.1
2. Operational aids such as boom hoist limiting device, boom
angle, boom length indicator, load weighing device, etc.,
are required on all equipment unless otherwise specied.
1615.2
Note: Operational aids are classied into Category I and
Category II. 1615.2
G. Requirements for the operation of cranes and derricks
include the following:
1. The employer shall:
a. Follow manufacturer procedures for operation of the
equipment including the use of attachments. Where
procedures for operation are unavailable, the employer
shall comply with 1616.1.
Note: While operating equipment, devices such as cell
phones shall not be used for any activities (texting,
talking, etc.) other than signaling.
b. Ensure loads are rigged by a qualied person or by
a trainee under the qualied person’s direct visual
supervision. 1616.1(x)
c. If equipment travels with a load, the employer shall ensure
that a competent person supervises the operation.
d. Ensure operators do not suddenly accelerate or
decelerate a moving load. 4999(f)
e. Not allow the load, boom, or other parts of the
equipment to contact any obstruction during lifting
operations. 1616.1(o)
2. Whenever there is a concern as to safety, the operator
shall have the authority to stop and refuse to handle loads
until a qualied person has determined that safety has
been assured. 1616.2
36 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Cranes | July 2022 37
3. Employers must control work areas and protect
employees in the hazardous areas. Requirements include:
a. Communication among operators and signal persons
shall be followed as per 1616.3 and 4993.1.
b. Where any part of a crane or derrick is within the load radius
of another crane or derrick, employers must establish a
system to coordinate the operations. 1616.3
c. Prevent employees from entering the hazardous areas
by providing employee training, setting up barriers, etc.,
as per 4993.1.
d. Before an employee goes to a location in the hazard
area that is out of view of the operator, the employee
must inform the operator. 4993.1(a)(3)(A).
4. Operations shall be conducted and the job controlled in
a manner that will avoid exposure of employees to the
hazard of overhead loads. Wherever loads must be
passed directly over workers, occupied work spaces, or
occupied passageways, safety type hooks or equivalent
means of preventing the loads from becoming disengaged
shall be used. All requirements under 1616.4 shall also
be met.
5. Boom free fall is prohibited in each of the circumstances
mentioned in 1616.5. Controlled load lowering is required
and free fall of the load line hoist is prohibited in each of
the circumstances mentioned in 1616.5(d).
6. The use of equipment to hoist employees is prohibited
except where the employer demonstrates that the
erection, use, and dismantling of conventional means of
reaching the work area would be more hazardous or is
not possible because of the project’s structural design or
worksite conditions. 1616.6(a)
7. Hoisting of personnel using cranes is permissible only
when all of the requirements of 1616.6 are met.
Note: The requirements of 1616.6 are supplemental and
apply when one or more employees are hoisted.
8. Supplemental requirements for using multiple crane/
derrick lifts are provided in 1616.7. Before beginning a
crane/derrick operation in which multiple cranes/derricks
will be supporting the load, the operation shall be planned
as per 1616.7(a) and directed by a qualied person.
H. The general requirements for using signals during the
operation of cranes and derricks are given in sections 1617.1
to 1617.3 and include the following:
1. A signal person shall be provided in each of the situations
given under 1617.1. Only qualied persons shall be
permitted to give signals except for a stop signal. Signals
to operators shall be by hand, voice, or audible method
and as per 1617.1. Some of the recommended hand
signals are shown in Illustration 4 on the next page.
2. The devices for transmitting signals shall be tested on site
before start of operations and the devices/signaling shall
meet requirements in 1617.2.
3. Follow the additional requirements in 1617.3 for voice
signals.
Note: Employees shall not text or talk unless it is for
signaling purposes.
38 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Cranes | July 2022 39
Illustration 4
Some of the Recommended Hand Signals
Note: For the complete list of recommended hand signals, see
GISOs 5001, Plate I.
I. The requirements for operator qualication, training and
certication, licensing, and evaluation are given in sections
1618.1
through 1618.4. They include the following:
1. Operator qualications/certication/in-training/evaluation
must comply
with 1618.1.
2.
Make sure that each signal person meets the qualication
requirements in 1618.2 prior to giving any signals.
3. Maintenance, inspection, and repair personnel are
permitted to operate the equipment only when all of the
requirements of 1618.3 are met.
4. The employer shall provide training to all operators, signal
persons, spotters, competent/qualied persons, and
operators-in-training
on their specic jobs as per 1618.4.
5.
Applicant must pass a physical examination, a substance
abuse test, and written and practical tests in order to
obtain an operator license.
J. T8 CCR sections 1619.1 through 1619.5 have supplemental
requirements for certain types of cranes and derricks.
Supplemental
requirements include the following:
1.
Section 1619.1 contains supplemental requirements for
erecting, climbing, operating, dismantling, and all other
operations and devices used in regard to tower cranes.
2.
The supplemental requirements for derricks, whether
temporarily or permanently mounted, are given in 1619.2.
3. Section 1619.3 contains supplemental requirements
for
oating cranes/derricks and land cranes/derricks on
barges, pontoons, vessels, or other means of otation.
See 1619.3 for complete requirements.
4. Overhead and gantry cranes, whether permanently or
temporarily
installed, are subject to the requirements of
1619.4.
5. The supplemental requirements for dedicated pile drivers
are given in
1619.5.
K. Side-boom cranes mounted on wheel or crawler tractors shall
meet all of the requirements
of 1694(d).
L.
A crane/derrick used to get divers in/out of water shall not be
used for any other purpose until all divers are back on board.
6060
M. There shall be no sudden acceleration or deceleration of the
moving load.
40 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Demolition | July 2022 41
N. Inadvertent contact with obstructions shall be prevented. The
load, boom, or other parts of the equipment shall not contact
any obstruction in a way that could cause falling material or
damage to the boom.
Demolition
The primary hazards associated with demolition are:
(1) falls from elevated work surfaces; (2) exposure to hazardous
air contaminants; (3) being struck by falling or collapsing
structures; and (4) electrical hazards. Regulations to address
these hazards include the following:
A. A DOSH permit is required for demolition of any building or
structure more than 36 ft. high. The Project Administrator
shall hold a Project Permit and all other employers directly
engaged in demolition or dismantling activity shall hold an
Annual Permit. 341(d)(3)
B. A pre-demolition survey must be made to determine whether
the planned work will cause:
1. Any structure to collapse. 1734(b)(1)
2. Worker exposure to hazardous chemicals, gases,
explosives, ammable materials, or similarly dangerous
substances. 1735(b)
3. Worker exposure to asbestos. 1529(k)(1), 1735(b)
4. Worker exposure to lead. 1532.1(d)(1)
5. Worker exposure to carcinogenic (cancer-causing)
chemicals, as specied in GISOs Article 110 Regulated
Carcinogens. 5203
6. Worker exposure to silica. 5144
C. Utilities to the structure being demolished must be turned o
or protected from damage. 1735(a)
D. Demolition techniques include the following:
1. Entrances to multi-story buildings must be protected by a
sidewalk shed or a canopy. 1735(j)
2. Demolition work on oors and exterior walls must progress
from top to bottom. 1735(f)(1)
Exception: Demolition with explosives and cutting chute
holes are not required to progress from top to bottom.
1735(f)(1)
3. The employer must check continually for hazards created
by weakening of the structure’s members. If such hazard
occurs, it must be corrected before workers may continue.
1735(d)(4)
4. Floor openings must have curbs and stop logs to prevent
equipment from running over the edge. ( )1735 v
5. Wall openings must be guarded except on the ground oor
and the oor being demolished. 1735(k)
6. Walkways not less than 20 inches wide must be provided as
a means of access across joists, beams, or girders. 1735(h)
7. To prevent dust from rising, demolition debris must be
wetted or other equivalent steps must be taken. 1735(t)
8. Whenever waste material is dropped to any point lying
outside the exterior walls of the building, enclosed chutes
shall be used unless the area is eectively protected by
barricades, fences, or equivalent means. Signs shall be
posted to warn employees of the hazards of falling debris.
1736(a)
9. Chutes or chute sections that are at an angle of more than
45° from the horizontal must be entirely enclosed except
for openings equipped with closures at or about oor level
for the insertion of materials. 1736(f)
10. When chutes are used to load trucks, they must be fully
enclosed. Gates must be installed in each chute at or near
the discharge end. A qualied person must be assigned
to control the operation of the gate and the backing and
loading of trucks. 1736(b)
11. Any chute opening into which employees dump debris by
hand must be protected by a guardrail. 1736(d)
12. When debris is dropped through holes in a oor without
the use of chutes, the area onto which the material is
dropped shall be completely enclosed with barricades
not less than 42 inches high and not less than 6 ft. back
from the projected edge of the opening above. Signs that
warn of the hazard of falling materials shall be posted at
each level. Removal of debris shall not be permitted in
the lower drop area until handling of debris ceases above.
1736(f)
E. Crane demolition work is guided by these regulations: 4941
1. The wrecking ball’s weight must not exceed 50% of the
clamshell rating or 25% of the rope-breaking strength.
4941(a)
42 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Electrical | July 2022 43
2. The swing of the boom should be limited to 30° left or
right. 4941(b)
3. The wrecking ball must be attached with a swivel-type
connection. 4941(b)
4. The load line and ball must be inspected at least twice
each shift. 4941(c)
5. Outriggers are required when using a truck crane to swing
a wrecking ball. 4941(d)
Note: See crane standards in the Cranes section of this
guide; Group 13 in the GISOs.
Dust, Fumes, Mists, Vapors, and
Gases
Oxygen-decient atmospheres or harmful dusts, fumes, mists,
vapors, or gases in concentrations sucient to present a hazard
to employees must be controlled when possible by removing the
employee from the exposure, limiting daily exposure, or applying
engineering controls. 1528
A. Whenever the above controls are not practical or fail to
achieve full compliance, respiratory protection must be used
in accordance with 5144. 1528(a)
B. Ventilation must comply with Article 4 in the GISOs if it is
used as an engineering control method. 1528(c)
C. Common sources of the above hazards may include:
1. Engine exhaust emission (carbon monoxide, NO ,
X
polycyclic aromatic hydrocarbons, and others).
2. Blasting (CO , NO , asbestos, silica, dust).
2 X
3. Concrete and rock cutting (asbestos, silica, dust).
4. Fuel storage tanks (harmful vapors).
5. Lead abatement (lead particles, lead compounds).
6. Asbestos abatement (asbestos bers).
7. Demolition (asbestos, silica, lead, dust, etc.).
8. Welding (fumes).
9. Painting and spraying (solvent, vapors, lead).
10. Sandblasting (asbestos, silica, lead, dust).
11. Harmful dust, fumes, mists, vapors, and gases from other
sources.
Electrical
Each year a large number of employees are injured or killed
because they come into contact with energized electrical wiring
or equipment. The Electrical Safety Orders (ESOs) are designed
to control or to eliminate these often deadly exposures and
include:
A. General requirements for protection from electric shock (other
than excavations). 1518
1. The employer must:
a. Identify exposed or concealed energized electric power
circuits if any person, machine, or tool might come into
contact with the circuit.
b. Advise employees of the location of energized circuits,
the hazards, and protective measures.
c. Provide legible markings or warning signs to indicate
the presence of energized electrical circuits.
2. Protective equipment or devices must be used to protect
employees if a recognized hazard exists.
3. When protective insulating equipment is used, it shall
comply with the Electrical Safety Orders.
4. Barricades shall be used in lieu of other protective
equipment.
Note: 1518(d) applies to electrical installations present on job
sites that do not involve excavations (as dened in 1540).
B. General requirements for low-voltage systems (<= 600 V)
1. Only qualied persons may work on electrical equipment
or systems. 2320.1(a)
2. Maintenance of electrical installations is required to ensure
their safe condition. 2340.1, 2340.2
3. Electrical equipment and wiring must be protected from
mechanical damage and environmental deterioration.
2340.26, 2340.11(a)(2), 2340.12(a)
4. Boxes, ttings, and enclosures must be guarded by
covers or barriers to prevent accidental contact with
44 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Electrical | July 2022 45
live parts, or guarded by location if accessible only by
qualied persons. 2340.17(a)
a. Except for fuse replacement and other necessary
access by qualied persons, maintain guarding of
energized parts within a compartment during operation
and maintenance functions to prevent accidental
contact with energized parts and dropped tools.
2340.17(d)
b. Install barriers to prevent employees not working on
the equipment from contacting exposed live parts when
there is temporary removal of guards. 2340.17(e)
c. Protection from ames and electric arcs during
construction, operation, and maintenance of
electric power generation, control, transformation,
transmission, and distribution lines and equipment,
including related equipment for the purpose of
communication or metering that are only accessible to
qualied employees. 2320.11
5. Making connections. 2320.2(b)
6. Minimum approach distance. 2320.2(d)
7. Fall Protection. 2320.8
C. General requirements for high-voltage systems (>600 V).
2940
1. Voltage determination. 2940.1
2. Minimum approach distances. 2940.2
a. Article 36 Appendix A—working on exposed
energized parts
3. Tools and protective equipment. 2940.6
a. Article 36 Appendix C—protective equipment
4. Mechanical equipment. 2940.7
5. Protection from ames and electric arcs during
construction, operation, and maintenance of electric
power generation, control, transformation, transmission,
and distribution lines and equipment, including related
equipment for the purpose of communication or metering
that are only accessible to qualied employees. 2940.11
a. Article 36 Appendix D—protection from ames and
electric arcs
6. Making connections. 2940.12
7. Hazardous energy control procedures. 2940.13
8. De-energizing lines and equipment for employee
protection. 2940.14
9. Grounding for the protection of employees. 2940.15
10. Safe work practices for high-voltage/power testing
performed in laboratories, shops, substations and in the
eld, and on electric transmission and distribution lines
and equipment. 2940.16
11. The disconnection and discharging of capacitors. 2940.17
12. Ensure that employees do not open the secondary of a
current transformer while the transformer is energized. If it
cannot be de-energized, then the circuit must be bridged
so that the current transformer secondary does not
experience an open-circuit condition. 2940.18
13. Series street lighting work. 2940.19
14. Work on or in proximity to overhead lines. 2941
15. Work on or in proximity to underground cables,
conductors, or equipment. 2943
16. Work on or in proximity to conductors and equipment
located in stations or switchyards. 2944
17. Work in power generation plants 2944.1
18. Access and workspace requirements. 2945
19. Live line tools. Appendix B
20. Protection from hazardous dierences in electrical
potential. Appendix E
21. Line clearance (tree trimming) operations. 2951
D. Main service equipment
Whenever the electric utility provides service via overhead
lines, the installation must:
1. Consist of an acceptable service pole. 2405.3
2. Be suitably grounded. 2395.5(b)
3. Provide suitable overcurrent protection. 2390.1
E. Wiring methods and devices
1. Flexible cords may be used in place of permanent wiring
methods for temporary work if the cords are equipped
with an attachment plug and energized from an approved
46 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Electrical | July 2022 47
receptacle. 2500.7(a), (b)
2. Flexible cords must be Type S and cannot be spliced
unless they are size No. 12 (or larger). 2500.9(a)
3. Skirted attachment plugs must be used on all equipment
operating at more than 300 V. 2510.7(b)
Exception: Plugs or connectors so designed that the arc will
be conned within the body or case of the device shall be
acceptable.
F. Grounding
1. Each receptacle must have a grounding contact that
is connected to an equipment-grounding conductor.
2510.7(a)
2. Temporary wiring must be grounded. 2405.2(g)
3. Electrically powered tools and electrical equipment with
exposed, non-current-carrying metal parts must be
grounded. 2395.45(b)
Exception: Double insulated powered tools need not be
grounded. 2395.45(b)
4. The frame of a portable generator and the frame of a
vehicle where the generator is located need not be
grounded under certain conditions. 2395.6
5. A system conductor shall be bonded to the generator
frame where the generator is a component of a separately
derived system. 2395.6(c)
G. Ground-fault circuit interrupters (GFCIs)
The GFCI device senses ground faults (accidental electrical
paths to ground) in circuits and immediately cuts o all
electrical power in that circuit.
1. GFCIs are required on receptacles that are not connected
to the site’s permanent wiring and that have a rating of 15
or 20 amps, 120V, AC, single phase. 2405.4(c)
2. The assured equipment grounding conductor program
(AEGC program) is an approved alternative to the GFCI
requirement if the following program elements are
included: 2405.4(d)
a. A description of the program must be written.
b. The employer shall designate one or more qualied
persons to implement the program.
c. Daily visual inspection of included equipment must be
conducted.
d. The following tests shall be performed:
(1) All equipment-grounding conductors shall be
tested for continuity and shall be electrically
continuous.
(2) All plugs and receptacles must be tested for
proper attachment to the equipment grounding
conductor.
e. The tests shall be performed as follows:
• Before the rst use of newly acquired equipment.
• Before equipment is returned to service.
• Before equipment is used after an incident that may
have caused damage.
• At intervals not to exceed three months.
f. The employer shall not make available or permit the
use of equipment that has not met the requirements of
2405.4(d).
g. A means of identifying tested equipment shall be
provided.
H. High-voltage power lines (> 600 V)
1. Great care must be taken when working or operating
equipment near overhead high-voltage power lines.
2. The required minimum safe distances (clearance) from
overhead lines energized by 600 V to 50,000 V are: 2946
a. For boom-type equipment in transit, 6 ft.
b. For boom-type equipment in operation, 10 ft.
c. For people working near overhead lines, 6 ft.
Note: See 2946 for minimum required clearances from
voltages greater than 50,000 V.
3. Amusement rides or attractions shall not be located
under or within 15 ft. (4.57 m) horizontally of conductors
operating in excess of 600 volts. 2946(b)(2)
4. The following activities are prohibited unless overhead
power lines have been de-energized and visibly grounded:
a. Work over high-voltage lines. 2946(b)(1)
48 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Emergency Medical Services | July 2022 49
b. Work within required clearances. 2946(b)(2)
Note: When work is to be performed within minimum
required clearances, the operator of the high-voltage
line must be notied by person or persons responsible
for the work before proceeding with any work, which
would impair the aforesaid clearance. 2948
I. High-voltage warning signs. 2947
High-voltage warning signs must be posted in plain view of
equipment operators.
J. Lock-out procedures
Lock-out procedures must be followed during the cleaning,
repairing, servicing, or adjusting of machinery. GISO 3314,
ESO 2320.4(a)(2)
K. Provide medical services and rst aid as required in General
Industry Safety Orders, section 3400. In addition, CPR and
First Aid trained personnel also must be available as per
2320.10, 2320.10(c).
Elevators, Lifts, and Hoists
Construction elevator and personnel hoist requirements are as
follows:
A. An elevator is required for structures or buildings 60 ft. or
more above ground level or 48 ft. below ground level when
completed. The elevator must be installed when the structure
or building reaches 36 feet in height. 1630(a)(1)
B. An elevator is required at demolition sites of seven or more
stories or 72 ft. or more in height. 1735(r)
C. Use of endless-belt-type manlifts is prohibited. 1604.1(a)
D. Before use, construction elevators must be inspected and
tested in the presence of a DOSH representative. A permit to
operate is required. 1604.29(a)
E. Ropes must be inspected at least once every 30 days, and
records of these inspections must be kept. 1604.25(j)
F. A capacity plate must be posted inside the car. 1604.21(b)
G. Elevators must be operated only by competent, authorized
persons. 1604.26(c)
H. Installation must comply with 1604.
I. Landings must be provided at the top oor and at least at
every third oor. 1630(d)
J. Landing doors must be mechanically locked so that they
cannot be opened from the landing side. A hook-and-eye lock
is prohibited. 1604.6(b)
K. For hoists located outside of a structure, the hoistway
enclosures must be 8 ft. high on the building side or the
scaold side at each oor landing and 8 ft. high on all sides
of the pit. 1604.5(c)
L. Hoistway doors shall be at least 6 1/2 ft. high. Solid doors
must contain a vision panel. (See 1604.6(a) for specic
requirements) 1604.6(a).
M. During inspection and maintenance, the car shall be operated
at the slowest speed. In-car operating devices shall not
function when car top operation is selected. The car top
operating devices shall include an emergency stop button.
The tops of cars shall be enclosed by a standard guardrail
and toeboard as per 3209. 1604.24.
Exception: See 1604.24(a)(3)(D).
Emergency Medical Services
Emergency Medical Services (EMS) must be readily available.
1512(a), (e)
A. A rst aid kit must be provided by each employer on all
job sites and must contain the minimum of supplies as
determined by an authorized licensed physician or as listed
in 1512(c). The contents of the rst-aid kit shall be inspected
regularly to ensure that the expended items are promptly
replaced. 1512(c)(1)
B. Trained personnel in possession of a current Red Cross First
Aid certicate or its equivalent must be immediately available
at the job site to provide rst aid treatment. 1504(a), 1512(b)
C. Each employer must ensure that its employees have access
to emergency medical services at the job site. Where more
than one employer is involved in a single construction project
on a given construction site, the employers may agree to
ensure employee access to emergency medical services for
the combined workforce present at the job site. 1512(a)
D. Each employer shall inform all of its employees of the
procedure to follow in case of injury or illness. 1512(d)
50 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Erection and Construction | July 2022 51
E. Employer shall have a written plan to provide emergency
medical services. 1512(i)
Medical services and rst aid in electrical works shall also
comply with the requirements of ESOs, as applicable.
2320.10, 2940.10
F. Proper equipment for prompt transport of the injured or ill
person to an EMS facility or an eective communication
system for calling an emergency medical facility, ambulance,
or re service must be provided. Telephone numbers for
listed emergency services must be posted (see Cal/OSHA
poster S-500). 1512(e)
G. Exposure to bloodborne pathogens is considered a job-
related hazard for construction workers who are assigned
rst aid duties in addition to construction work. Although
construction employers are specically exempted from
GISO 5193 requirements, they are required to provide
appropriate protection for employees who may be exposed
to bloodborne pathogens when providing rst aid. 3203
Engine Exhaust Emission
Extreme care must be taken when engine exhaust can build up
in work spaces, such as conned spaces, excavations, trenches,
and inside buildings or enclosed structures.
A. Exhaust purier devices approved by DOSH or California
Air Resources Board (CARB) must be used to maintain
concentrations of dangerous gases or fumes below
maximum acceptable concentrations if natural or forced
dilution ventilation and exhaust collection systems are
inadequate. 5146
Note: Approval by DOSH will be based on the Maximum
Allowable Standards for Internal Combustion Engine
Exhaust Emissions as set forth in 5146(c).
B. When employees enter shafts (20 ft. or less), culverts,
or pipelines where a hazardous atmosphere exists or is
reasonably expected to exist, a mechanical ventilation system
shall be provided to prevent exposure to engine emissions.
1533(b)
C. Internal combustion engine-driven equipment can be
operated inside buildings or enclosed structures only when it
does not result in exposure to dangerous gases or fumes as
per 5155. 1533(a).
D. Use of internal combustion engines in tunnels is prohibited.
7070(a)
Exception: Diesel engines may be used in underground
tunnels if the engines
are permitted by DOSH. 7069, 7070,
8470
Erection and Construction
Every year many workers lose their lives or are seriously injured
when they fall or are crushed or struck because the structure
they are erecting shifts or collapses. The following SOs address
these hazards:
A. Truss and beam requirements
1. Trusses and beams must be braced laterally and
progressively during construction to prevent buckling or
overturning. The rst member shall be plumb, connected,
braced, or guyed against shifting before succeeding
members are erected and secured to it. 1709(b)
2. An erection plan and procedure must be provided for
trusses and beams more than 25 ft. long. The plan must
be prepared by a California-registered Professional
Engineer, and it must be followed and kept available on
the job site for inspection by Cal/OSHA sta. 1709(d)
B. Structural steel erection 1710
1. A load shall not be released from its hoisting line until
the solid web structural members are secured at each
connection with at least two bolts (of the same size/
strength as indicated in the erection drawings) and drawn
wrench-tight. 1710(g)(1)
2. Steel joists or steel joist girders shall not be placed on any
support structure until the structure is stabilized.
1710(h)(1)(D)
3. When steel joist(s) are landed on a structure, they shall
be secured to prevent unintentional displacement prior to
installation. 1710(h)(1)(E)
4. Floors must be planked at every other story or 30 ft.,
whichever is less. 1635(b)(3), 1710 (l)(7)
5. A oor must be installed within two oors below any tier
of beams on which erection, riveting, bolting, welding,
or painting is being done; otherwise, fall protection is
required. 1635(b)(2)
52 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Erection and Construction | July 2022 53
6. Fall protection is required when workers are connecting
beams where the fall distance is greater than two stories
or 30 ft., whichever is less. 1710(m)(1)
Note: At heights over 15 ft. and up to 30 ft., workers
performing connecting operations must wear personal fall
protection that gives them the ability to tie o.
7. During work other than connecting operations, fall
protection is required where the fall distance is greater
than 15 ft. 1710(m)(2)
8. Before any steel erection begins, the controlling contractor
must provide the steel erector written notications related
to concrete strength and anchor bolt repair/replacement.
1710(c)
9. Prior to removal of planking or metal decking, all
employees must be instructed in the proper sequence of
removal and safety. 1635(b)
10. Requirements for the working area where oor openings
are to be uncovered: 1635(c)
a. The area must be in the exclusive control of steel
erection personnel and shall be barricaded to prohibit
unauthorized entry.
b. The oor area adjacent to the oor opening shall be
barricaded or the oor opening shall be covered when
not attended by steel erection personnel.
c. Floor openings shall be guarded by either temporary
railings and toeboards or by covers. 1632(b)(1)
d. Covers shall:
(1) Be capable of safely supporting the greater of
400 pounds or twice the weight of the employees,
equipment, and materials that may be imposed on
any one square foot area of the cover at any time.
1632(b)(3)
(2) Have not less than 12 inches of bearing on the
surrounding structure. 1635(c)(3)
(3) Be checked by a qualied person prior to each
shift and following strong winds. 1635(c)(5)
(4) Never be removed by walking forward where the
walking surface cannot be seen. 1635(c)(6)
(5) Bear a sign stating “OPENING—DO NOT
REMOVE” in 2-inch-high, black bold letters on a
yellow background. 1635(c)(4)
11. Permanent Flooring-Skeleton Steel Construction in Tiered
Buildings
Unless the structural integrity is maintained by the design
1710(k):
a. There shall be not more than eight stories between the
erection oor and the uppermost permanent oor.
b. There shall be not be more than four oors or 48 ft.,
whichever is less, of unnished bolting or welding
above the foundation or uppermost permanently
secured oor.
12. All columns must be anchored by a minimum of four
anchor bolts. 1710(f)(1)(A)
Exception: When columns are braced or guyed to provide
the stability to support an eccentric load as specied in
1710(f)(1)(B).
Note: Persons engaged in steel erection should review
and be knowledgeable in all the requirements contained
in section 1710.
C. Wood/light gauge steel, residential and light commercial
frame construction
1. Joists, beams, or girders of oors below the oor or level
where work is being done, or about to be done, must be
covered with ooring laid close together. 1635(a)(1)
2. Employees shall not work from or walk on structural
members until they are securely braced and supported.
1716.2(d)
3. Before manually raising framed walls that are 15 ft. or
more in height, temporary restraints, such as cleats on the
foundation or oor system or straps on the wall bottom
plate, must be installed to prevent inadvertent horizontal
sliding or uplift of the framed wall bottom plate. Anchor
bolts alone shall not be used for blocking or bracing when
raising framed walls 15 ft. or more in height. 1716.2(c)
4. When installing windows, wall openings shall be guarded
as required by 1632; however, the guardrail may be
removed for actual window installation if necessary.
1716.2(h)
5. Scaolds used as an edge protection platform must be
fully planked, not more than 2 ft. below the top plate,
54 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Ergonomics in Construction | July 2022 55
and located no more than 16 inches from the structure.
1716.2(i)(3)
6. Employees exposed to fall hazards must be trained to
recognize and minimize the fall hazard. 1716.2(j)
7. Employees performing framing activities who are exposed
to fall heights of 15 ft. or greater must be protected by
guardrails, personal fall protection systems, or other
eective means. 1716.2(e)
D. Reinforcing steel and post-tensioning in concrete
construction:
1. Know and understand T8 CCR sections 1711, 1712, 1713,
and 1717.
a. Site access and layout. 1711(c)
b. Written notications. 1711(d)
c. Stability requirements for vertical and horizontal
columns, walls, and other reinforcing assemblies.
1711(e)
d. Impalement protection and custody of protective covers.
1711(f) and 1712
e. Requirements for hoisting and rigging reinforcement
assemblies. 1711(g)
f. Post-tensioning operations. 1711(h)
g. Fall protection. 1711(i)
h. Formwork and falsework. 1711(j)
i. Training Requirements. 1711(k)
j. Framed panels and concrete forms. 1713
k. Falsework and vertical shoring. 1717
Ergonomics in Construction
Ergonomics is the study of improving the t between the worker
and the physical demands of the workplace. Ergonomics can
be used to reduce injuries, improve productivity, and reduce the
costs of doing business.
The construction industry suers from debilitating and costly
occupational injuries, primarily to workers’ backs, necks,
shoulders, hands, and arms. These types of injuries or traumas
are commonly called repetitive motion injuries (RMIs) and
are caused by activities that are repeated on a regular basis.
Symptoms of RMIs may include chronic pain, numbness,
tingling, weakness, and limited range of motion. RMI symptoms
may not be noticeable for months or even years after exposures,
or may appear to be acute after a sudden and severe onset.
A. Factors that can contribute to RMIs:
1. Awkward postures
2. Forceful exertion, including heavy lifting
3. Repetitive work
4. Vibration from tools and equipment
5. Pinching (contact stress) during tool use and material
handling
6. Temperature extremes
7. Lack of recovery time to aected body parts
Note: Repeated localized fatigue or soreness after
completion of the same task or day’s work often indicates
that the worker is being exposed to conditions that can
lead to RMIs.
B. Knowledge of ergonomic principles can be used to produce
simple changes in the workplace and work activities, which
in turn can avoid injury, improve productivity, and make jobs
easier. The requirements that employers must follow include
the following: 5110
1. Employers must establish and implement a program
designed to minimize RMIs if more than one person is
diagnosed with RMIs as follows:
a. The RMIs are work related.
b. The employees incurred the RMIs while performing a
job process or operation of identical work activity.
c. The RMIs were reported in the past 12 months.
d. A licensed physician objectively identied and
diagnosed the RMIs. 5110(a)
2. The program must include the following:
a. A work site evaluation.
b. Control of exposures that caused the RMIs.
c. Training of employees. 5110(b)
56 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Excavation, Trenches, and Earthwork | July 2022 57
C. Some ways to eliminate or reduce RMIs:
1. Proper lifting and material handling
2. Use of equipment to reduce load and strain
3. Employee rotation for repetitive tasks
4. Use of ergonomically designed tools
5. Use of personal protective equipment
6. Appropriately timed rest periods
D. Employer should regularly scrutinize the 300 Log to see
whether multiple cases of RMI’s are being reported. If an
employer fails to monitor for such patterns of illness, as
reported on the Log, the employer might fail to identify that
two or more RMI cases have occurred in the past year, and
therefore fail to meet the triggered requirement for more careful
assessment of ergonomic risks.
Excavation, Trenches, and
Earthwork
Hazards associated with excavation are cave-ins; the striking of
underground utilities; falling tools, materials, and equipment; and
hazardous air contaminants or oxygen-decient environments.
A. The minimum safety requirements are as follows:
1. Before opening an excavation, these actions must be
taken: 1541
a. Must identify subsurface installations prior to opening
an excavation and ensure they are marked.
b. Two working days before starting the work, notify
all regional notication centers and all subsurface
installation owners who are not members of the
notication centers.
Exception: Emergency repair work to subsurface
facilities done in response to an emergency, as dened
in Government Code section 4216(d).
c. Must receive a positive response from all known
owners/operators of subsurface installations.
d. Must meet with owners/operators of high priority (such
as high-pressure pipelines, natural gas/petroleum
pipelines, electrical lines greater than 60,000 volts, etc.)
and subsurface installations that are located within 10
ft. of the proposed excavation.
e. Only qualied persons (persons that meet training and
competency requirements) can perform subsurface
installation locating activities.
f. All exposed employees must be trained in excavator
notication/excavation activities.
g. Obtain a permit from DOSH if workers are required to
enter an excavation that is 5 ft. deep or deeper.
341(a)(1)
2. While excavating, the exact locations of the underground
utilities must be determined by safe and acceptable
means. 1541(b)(3)
3. Excavators must immediately notify the subsurface
installation owner/operator of any damage discovered
during or caused by excavating activities. If the damage or
escaping material endangers life or property, immediately
notify 911.
4. While the excavation is open, the underground utilities
must be protected, supported, or removed as necessary.
1541(b)(4)
When employees are in an excavation, the following
requirements apply:
1. Employees shall be protected from cave-ins by an
appropriate protective system. 1541.1(a)(1)
Exception: If excavations are made entirely in stable rock
or are less than 5 ft. deep, and a competent person has
determined that there is no potential for a cave-in, no
protective system is needed.
2. A competent person must be on site to do the following:
a. Conduct inspections of the excavations, adjacent
areas, and protective systems before the start of work,
as needed throughout the shift, and daily for potential
cave-ins, failures, hazardous atmospheres, or other
hazards. 1541(k)(1)
b. Take prompt corrective action or remove employees
from the hazard.
3. The competent person must be able to demonstrate the
following:
a. The ability to recognize all possible hazards associated
B.
58 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Excavation, Trenches, and Earthwork | July 2022 59
with excavation work and to test for hazardous
atmospheres.
b. Knowledge of the current safety orders pertaining to
excavation and trenching.
c. The ability to analyze and classify soils.
d. Knowledge of the design and use of protective systems.
e. The authority and ability to take prompt corrective action
when conditions change.
C. Requirements for protective systems include the following:
1. Protective system design must be based on soil
1541.1
Appendix A (b), (c)
2.
protective system design is based on Type C soil:
a.
environmental conditions. 1541.1 Appendix A (a)(1)
b.
A, B, or C soil. 1541.1 Appendix A (c)(1)
c.
one visual and at least one manual analysis. 1541.1
Appendix A (c)(2)
Table 1 | Site Conditions That Aect Rock/Soil
Slope Stability
Condition Requirement
Soil is fractured/unstable
dry rock.
Downgrade to Type B.
Soil is fractured/unstable
submerged rock.
Downgrade to Type C.
Soil is cemented (caliche,
hardpan, etc.)
Classify as Type A.
Downgrade from Type A to
Type B.
Soil is subject to vibration. Downgrade from Type A to
Type B.
Soil has been previously
disturbed.
Downgrade from Type A to
Type B.
Soil is submerged or
water is freely seeping
through the sides of the
excavation.
Downgrade from Type A to
Type C.
Downgrade from Type B to
Type C.
the layers dipping into the
excavation on a slope of
four horizontal or steeper.
Downgrade from Type A to
Type C.
Downgrade from Type B to
Type C.
60 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Excavation, Trenches, and Earthwork | July 2022 61
Illustration 5
Start here
Is soil submerged or is water freely seeping
through the side of the excavation?
This is a gravel
This is a sand
This is a clay
This is a silt 0.5 – 1.5 tsf
Are grains angular?
sYe
sYe
sYe
sYe
sYe
Type C
Type C Type C Type C
Type B
But check Table 1
Type B
But check Table 1
Type B
But check Table 1
Type A
But check Table 1
No
No
No
No
No
Are at least 50% of the grains (by mass)
large enough to be seen with the naked eye?
Is the soil cohesive? Does the soil exhibit:
1) Medium or greater plasticity?
2) Medium or greater toughness?
3) Medium or greater dry strength?
4) Slow reaction during dilatancy test?
compressive strength.
Are at least 50% of the
visible grains (by mass)
” ?
larger than
3. Standard shoring, sloping, and benching must be used as
1540 and 1541.1(b) or according to tabulated
data prepared by a registered engineer (see Illustrations
6–8 below).
4. Protective systems for excavations deeper than 20 ft. shall
be designed by a registered engineer. 1541.1 Appendix F
5. Additional bracing must be used when vibration or
surcharge loads are a hazard. 1541.1 Appendix A
6. Excavations must be inspected as needed after every
rainstorm, earthquake, or other hazard-increasing
occurrence (water in the excavation may require a
1541(k)(1)
7. Employees must be protected from falling materials
by scaling, installation of protective barriers, or other
methods. 1541(j)(1)
8. Uprights shall extend to the top of the trench and its lower
end not more than 2 feet from the bottom of the trench.
1541(j)(1)
9. Employees must be protected from excavated or other
material by keeping such material 2 ft. from the excavation
edge or by using barrier devices. 1541(j)(2)
10. Ladders or other safe access must be provided within 25
ft. of a work area in trenches 4 ft. or deeper. 1541(c)(2)
11. Excavation beneath the level of adjacent foundations,
retaining walls, or other structures is prohibited unless
requirements of 1541(i) have been met. 1541(i)(1)
12. Shored, braced, or underpinned structures must be
inspected daily when stability is in danger. 1541(i)(2)
13. Walkways or bridges with standard guardrails must be
installed when employees or equipment are required or
permitted to cross over excavations that are at least 6 ft.
deep and wider than 30 in. 1541(l)(1)
14. Barriers must be erected around excavations in remote
locations. All wells, pits, shafts, and caissons must be
work is completed. 1541(l)(2)
62 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Excavation, Trenches, and Earthwork | July 2022 63
Illustration 6 | Benching & Sloping For Excavations Made in Type “A” Soil
Illustration 7 | Benching & Sloping For Excavations Made in Type “B” Soil
64 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Explosion Hazards | July 2022 65
Illustration 8 | Benching & Sloping for Excavations Made in “Type C” Soil
D. Safety orders pertaining to shafts and wells include the
following:
1. All shafts and wells more than 5 ft. deep into which
workers are required to enter must be retained with
lagging, spiling, or casing. 1542(a)(1)
2. Tests or procedures shall be performed before entry
into exploration shafts to ensure the absence of
1542(c)(3), 5158
3. An employee entering a bell-bottom pier hole or other
that has a lifeline attended by another employee.
1541(g)(2)(B)
4. Shafts in other than hard, compact soil shall be completely
lagged and braced. 1542(c)(1)
5. Head protection is required for workers who enter a well or
shaft. 3381
6. Shafts more than 20 ft. deep are subject to the TSOs.
8403(a)
7. Provide mechanical exhaust ventilation system and forced
air blower or both for shafts 20 ft. or less which employees
enter and where hazardous atmosphere exists or
reasonably expected to exist due to internal combustion
engine operation. 1533(b)
Explosion Hazards
At times, employees may be exposed to explosion hazards
without their knowledge. In addition to substances (such as
creating explosions, there are substances that will cause an
explosion when present in certain concentrations and exposed to
an ignition source. SOs to control these hazards include:
A. Combustible dust:
1. Combustible dust concentrations must be controlled at
or below 25% of the lower explosive limit (LEL) unless
5174(a)
2. Accumulated and settled combustible dusts must be
5174(b)
3. Cleaning with compressed air and blowing combustible
dust may be done only when other methods cannot
be used, when possible sources of ignition have been
eliminated, and when hoses and nozzles are grounded.
5174(f)
B. Flammable vapors:
1.
exceeding 25% of the LEL. 5416(a)
66 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Fall Protection | July 2022 67
2. No source of ignition is permitted indoors or outdoors
where vapor or gas concentrations may reasonably be
expected to exceed 25% of the LEL. 5416(c)
3.
are toxic even at a very low concentration and can cause
measures to keep employees safe.
Note: Check also for conned space conditions and
hazardous locations. 5158, 2540.1, Conned Spaces section
of this guide.
Fall Protection
T8 CCR includes fall protection standards in various sections of
levels of the fall hazards associated with each activity.
A.
1. Fall height
2. Level of hazard awareness and skill of the employee
3.
stability of the employee on the work surface)
4. Duration of exposure to the fall hazard
Note: Because factors 2, 3, and 4 listed above vary with
dierent trades and activities, the regulatory requirements for
fall protection reect those dierences. Below nd denitions
and selected fall protection requirements:
B. A personal fall protection (PFP) system prevents a worker
from falling or—if the worker is falling—stops the fall. PFP
systems include guardrails, safety nets, personal fall restraint
systems, personal fall arrest systems, and positioning device
systems.
1. Guardrails are required to guard the open sides of all
work surfaces that are 7 1/2 ft. or higher or workers must
be protected by other means. The railing must be made
from select lumber (Doug Fir#1 or better, 1500 psi or
equivalent) and must consist of a top rail 42 inches to
45 inches high, 2” x 4” (min.); a 1” x 6” mid-rail halfway
2” x 4” at 8 ft. o.c.
2. A personal fall restraint (PFR) system is used to prevent
an employee from falling. It consists of anchorages,
connectors, and a body belt or harness. It may include
lanyards, lifelines, and rope grabs designed for that
purpose.
3. A personal fall arrest (PFA) system is used to stop an
employee during a fall from a working level and to keep
him or her from hitting a lower level or structure. The
system consists of an anchorage, connectors, and a body
harness. It may include a lanyard, a lifeline, a deceleration
device, or suitable combinations of these. A PFA system
must meet the following requirements:
a. It must limit the maximum arresting force on an
employee to 1,800 lbs.
b. It must be rigged so that an employee can neither free
fall more than 6 ft. nor contact any lower level, and,
where practicable, the anchor end of the lanyard shall
be secured at a level not lower than the employee’s
waist.
c. Anchorage points must be able to support 5,000 lbs. per
employee attached or:
(1) Must be designed, installed, and used as part of
a complete PFA system with a safety factor of
two; and
(2)
d. The PFA system lifeline must meet the following
requirements: 1670(b)
(1) It must be able to support 5,000 lbs.
(2) Each employee must be attached to a separate
lifeline. 1670(b)(4)
Exception: During the construction of elevator
shafts, two employees may be attached to a
lifeline that is able to support 10,000 lbs.
(3) The lower end of the vertical lifeline must extend
to within 4 ft. from the ground. 1504
(4) A horizontal lifeline system must be designed,
installed, and used under the supervision of a
factor of at least two. 1670(b)(2)
Note: The use of a body belt as a part of a PFA
system is prohibited. 1670(b)
68 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Fall Protection | July 2022 69
4. Body belts, harnesses, and components shall be used
only for employee protection and not to hoist materials.
Body belts used in conjunction with fall restraint systems
or positioning devices shall limit the maximum arresting
force on an employee to 900 lbs. 1670(b)
5. Safety nets may be used in place of all other fall protection
systems if the nets are installed properly. 1671
C. A PFP system compliant with section 1670 must be used if
guardrails or safety nets are not installed for the following fall
distances and work activities:
1. A fall distance of more than 6 ft. when placing or tying
reinforcing steel in walls, columns, piers, etc. 1711(i)
Exception: Reinforcing ironworkers may travel point-to-
point horizontally or vertically on reinforcing steel up to
24 ft. above the surface provided there are no impalement
hazards.
2. A fall distance of 7 1/2 ft. or greater during the following:
a. Work from the perimeter of a structure, through shaft-
ways and openings. 1670(a)
b. Work anywhere on roofs with slopes greater than 7:12.
1670(a)
c. Work from thrust-outs or similar locations when the
worker’s footing is less than 3 1/2 inches wide.
1669(a)
d.
or advertising sign platforms. 1670(a)
e. Work from slopes steeper than 40 degrees. 1670(a)
3. A fall distance of 15 ft. or greater during the following:
a. Work from buildings, bridges, structures on construction
members, such as trusses, beams, purlins, or plates
that are of at least 4-inch nominal width. 1669(a)
b. Ironwork other than connecting. 1710(g)(2)
c. Work on structural wood framing systems and during
framing activities on wood or light gauge steel frame
residential/light commercial construction. 1716.1(c)(1),
1716.2(e)
Exception: For residential/light commercial frame
construction, workers are considered protected when
working on braced joists, rafters, or roof trusses spaced
on 24-inch (or less) centers when they work more than
6 ft. from unprotected sides or edges.
4.
operations (see exceptions in 2a above and 6a and 6b
below). 1730(b)
5. A fall distance of 30 ft. or greater, when ironworkers are
connecting structural beams. 1710(g)(1)
6. Any height during work:
a. On roofs sloped steeper than 7:12, the air hose for
the pneumatic nailer shall be secured at roof level in
such a manner as to provide ample, but not excessive,
amounts of hose. 1704(d)
b. On roofs, while an operator uses a felt-laying machine
or other equipment that requires the operator to walk
backwards (see prohibitions). 1730(d)
c. From boatswain’s chairs. 1662(c)
d. 1663(a)(5)
e. 1664(a)(12)
f. 1660(g)
D. A fall protection plan (FPP) must be implemented when
a fall protection (FP) system is required but cannot be
used because the system creates a greater hazard or is
impractical. 1671.1
The fall protection plan must: 1671.1(a)(1)
1.
the plan.
2.
essentially identical operations.
3. Be updated by the QP.
4. Document why a conventional FP system cannot be used.
5. Identify the competent person to implement and supervise
the FPP.
6. Identify the controlled access zone for each location
where a conventional FP system cannot be used.
7. Identify employees allowed in the controlled access zone (CAZ).
8. Be implemented and supervised by the competent person.
70 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Fire Protection and Prevention | July 2022 71
Note: An up-to-date copy of the fall protection plan must be
at the job site.
E. The controlled access zone must be established and
maintained as follows: 1671.2
1. A control line or its equivalent must control access to the
CAZ and must:
a. Consist of ropes, wires, tapes, or equivalent materials
and be supported by stanchions.
b.
c. Be rigged not fewer than 39 inches and not more than
45 inches from the working surface.
d. Have a breaking strength of 200 lbs. (min.). See 1671.2
for greater detail.
2. Signs must be posted to keep out unauthorized persons.
3. A safety monitoring system is required and must include a
designated safety monitor who is able to:
a. Monitor the safety of other employees.
b. Recognize fall hazards.
c. Warn an employee when it appears that the employee
is unaware of a fall hazard or is acting in an unsafe
manner.
d. Stay in sight of and in communication with the
employee being monitored.
e. Have no other responsibilities. 1671.2
Note: Only an employee covered by a fall protection plan
shall be allowed in a CAZ.
F.
1731(c)
1. For roof slopes 3:12 through 7:12, the following applies:
Employees shall be protected from falling where the eave
height exceeds 15 feet above grade or level below by use
of one or any combination of methods prescribed below:
a. Personal Fall Protection. 1670
b. Catch Platforms. 1724
c. 1724
d. Eave Barriers. 1724
e. Standard Railings and Toeboards. 1620, 1621
f. Roof Jack Systems. 1724
2. For roof slopes steeper than 7:12, the following applies:
Regardless of height, employees shall be protected from
falling by methods prescribed above with exception of
Eave Barriers and Roof Jack Systems.
G. Section 1730
production-type residential construction with roof slopes
3:12 or greater. 1730(f)(6)
Fire Protection and Prevention
prevention program and ensuring that it is followed throughout all
phases of the construction work. 1920(a)
A.
1. Freely accessible at all times. 1920(b)
2. Placed in a conspicuous location. 1920(c)
3. Well-maintained. 1920(d)
B.
equipment must be made available as soon as combustible
materials accumulate. 1921(a)
C. Fire extinguisher use must comply with the following:
1. Fire extinguishers must be kept fully charged, inspected
monthly, and serviced annually. 1922(a)
2.
3.
4. Fire extinguishers rated not less than 2A must be provided
5. Fire extinguishers must be kept within 75 ft. of the
protected area. 1922(a)
Exception: Fire extinguishers must be kept within 50 ft. of
wherever more than 5 gal. of ammable or combustible
liquid or 5 lbs. of ammable gas is being used. 1922(a)
72 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Flammable and Combustible Liquids | July 2022 73
6.
annually. 6151(g)
Note: See specic SOs and manufacturing specications for
appropriate use of re extinguishers.
When sprinklers are provided, they shall be installed in an
approved manner as per the California Fire Code, CCR, Title 24,
section 903.3. 1933, 6170
First Aid
A.
job sites and must contain the minimum of supplies as
determined by an authorized licensed physician or as listed
in 1512(c).
B. Trained personnel in possession of a current Red Cross First
1504(a), 1512(b)
C. Each employer shall inform all of its employees of the
procedure to follow in case of injury or illness. 1512(d)
D. Emergency medical services, including a written plan, must
be provided. 1512(a), and (e)
E. Exposure to bloodborne pathogens is considered a job-
related hazard for construction workers who are assigned
GISO 5193 requirements, they are required to provide
appropriate protection for employees who may be exposed
3203
Flaggers
Flaggers must be used at locations on a construction site as
A.
warning. 1599(b)
B.
conform to the requirements of the “California Manual on
January 13, 2012” (the Manual), published by Caltrans.
1598(a), and 1599(c)
C. Warning signs must be placed according to the “The
Manual.” 1599(c)
D. Flaggers must wear orange or strong yellow-green warning
garments, such as vests, jackets, shirts, or rainwear. 1599(d)
E. The employer shall select the proper type (class) of high-
visibility safety apparel for a given occupational activity
by consulting “The Manual,” apparel manufacturer, ANSI/
Services Association (ATSSA). 1599(f)
F. Flaggers shall wear warning garments manufactured in
accordance with the requirements of ANSI/ISEA 107-2004,
High Visibility Safety Apparel and Headwear. 1599(d)
G. During the hours of darkness: 1599(e)
•
in accordance with the requirements of the ANSI/ISEA
107- 2004, High Visibility Safety Apparel and Headwear.
•
distance of 1,000 ft.
• During snow or fog conditions, only colored vests, jackets,
ANSI/ISEA and the minimum distance requirements shall
be worn.
H. Flaggers must be trained. 1599(g)
I. Training must be documented in accordance with the IIPP
requirements. 1599(g)
Flammable and Combustible
Liquids
Flammable and combustible liquids include gasoline, paint
thinners, solvents, etc.
A. These liquids must be kept in closed containers when not in
use. 1935(a)
B. Leakage or spillage must be disposed of promptly and safely.
1935(b)
74 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Forklifts | July 2022 75
C. Flammable and combustible liquids may be used only where
1935(c))
D.
plainly marked with a warning legend. 5417(a)
E. Flammable liquids must not be used: 5417
•
there is adequate ventilation
• To spray for cleaning purposes unless the liquids are used
in a spray booth or outdoors where there is no ignition
source within 25 ft. of their use
F. Flammable liquids must be stored and transported in closed
containers. 5417(e)
Note: For specic requirements concerning indoor and
outdoor storage, see 1931 and 1932. For on-site dispensing
operations, see 1934.
G. A hazard communication program is required. 5194
Forklifts
Safety regulations concerning the use of forklifts are as follows:
A. Industrial trucks such as forklifts shall be designed,
constructed, and maintained in accordance with the
applicable standards. 3650(c)
B. The employer shall establish and enforce a system to prevent
trucks, trailers, or railcars from pulling away from the loading
dock before the loading or unloading operation is completed.
Trucks, trailers, and railcars boarded by forklifts during
loading dock operations shall be secured against unintended
movement. 3336
C. The rated lifting capacity of the forklift must be posted in a
location readily visible to the operator. 3660(a)
D. Elevating employees requires the following:
1. The forklift must be equipped with a platform not less than
24” x 24” in size.
a. The platform must be properly secured to the forks or
the base of the fork carriage.
b. The platform must be equipped with guardrails,
toeboards, and a back guard.
c. It must have no spaces or holes larger than 1 inch.
d. It must have a slip-resistant platform surface.
3657(b)(5)
2. The operator must be at the controls while the employees
are elevated. 3657(e)
3. The operator must follow the operating rules as per
3657(j) for elevating employees. 3657(j)
4. Employees shall not sit, climb, or stand on platform
guardrails or use planks, ladders, or other devices to gain
elevation. 3657(i)
Note: When guardrails are not possible due to clearance
limits/nature of the work, personal fall protection is
required. 3657(b)
5. Where boom type forklifts are used to elevate employees,
personal fall restraint or positioning devices must be used
in addition to the above requirements.
E. All forklifts must have parking brakes. 3661(b)
F. All forklifts must have an operable horn. 3661(c)
G. When the operator is exposed to the possibility of falling
objects, the forklift must be equipped with overhead
protection (canopy). 3657(d)
H. When provided by the industrial truck manufacturer, an
operator restraint system such as a seat belt shall be used.
3650(t)
I. Seat belt assemblies shall be provided and used on all
equipment where rollover protection is installed. 3653(a)
J. The employer must post and enforce a set of operating rules
that includes, but not limited to the following: 3650(t)
1. Only trained and authorized drivers may operate forklifts.
2. Stunt driving and horseplay are prohibited.
3. Employees must not ride on the forks.
4. Employees must never be permitted under the forks
(unless forks are blocked).
5. Employees must never place any part of their bodies
outside the running lines of an industrial truck or between
mast uprights.
6. The driver must inspect the vehicle once during a shift.
76 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Forms, Falsework, and Vertical Shoring | July 2022 77
7. The operator must look in the direction of travel and must
not move the vehicle until all persons are clear of the
vehicle.
8. Forks must be carried as low as possible.
9.
and set the brakes (or block the wheels) before leaving
the forklift unattended (when the operator is out of sight of
the vehicle or 25 ft. away from it).
10. Trucks must be blocked and brakes must be set before a
forklift is driven onto the truck bed.
11. Extreme care must be taken when tilting elevated loads.
12. The forklift must have operable brakes capable of safely
stopping it when fully loaded.
K.
employer) before operating a forklift. 3668(a)
1. An evaluation of the operator’s performance must be
conducted at least once every three years. 3668(d)
2. Refresher training in relevant topics must be provided to
the operator when: 3668(d)(1)
a. The operator is observed operating the vehicle in an
unsafe manner.
b. The operator has been involved in an accident or near-
miss incident.
c. The operator’s evaluation reveals that he or she is not
operating the truck safely.
d.
truck.
e.
operation of the truck.
L. The use, care, and maintenance of slings used in lifting
suspended loads must meet the requirements of Article 101
of the GSO. 3650(u)
M. Loads must be so balanced, braced, or secured as to
prevent tipping and falling. Only stable or safely arranged
loads shall be handled. 3650(l)
Forms, Falsework, and Vertical
Shoring
Falsework, however, also includes support systems for forms,
until appropriate curing or stressing processes have been
completed.
See below for selected SOs:
A. Design of falsework
1. Concrete formwork and falsework must be designed,
supported, and braced to safely withstand the intended
load. 1717(a)(1)
2. Falsework design, detailed calculations, and drawings
must be signed and approved by an engineer (Ca PE)
the individual horizontal span length exceeds 16 ft., or
1717(b)(1)(A), (B)
Note: For other falsework, approval may be provided by a
manufacturer’s representative or a licensed contractor’s
qualied representative. 1717(b)(2)(B), and (C)
3. Falsework plans must be available at the job site.
1717(b)(3)
4. Minimum design loads are as follows: 1717(a)(2)
a. Total combined live and dead load: 100 psf.
b. Live load and formwork: 20 psf.
5. Additional loads must be considered in the design.
1717(a)
B. Erection of falsework
1. Falsework must be erected on a stable, level, compacted
base and supported by adequate pads, plates, or sills.
1717(b)(4)
2. Shore clamps (metal) must be installed in accordance
with manufacturer’s instructions. 1717(d)(2)
C. Inspection
1. Before pouring concrete on falsework requiring design
approval, an engineer (Ca PE) or the engineer’s
78 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Guardrails | July 2022 79
representative must inspect for and certify compliance
with plans. 1717(c)(1)
Note: For other falsework, the inspection and certication
may be provided by a manufacturer’s representative or a
licensed contractor’s qualied representative.
1717(c)(2)(B), and (C)
2. A copy of the inspection certication must be available at
the job site. 1717(c)(3)
D. Access to forms and falsework
1. Joists (5 1/2 inch wide) at not more than 36 inches o.c.
may be used as walkways while forms are placed.
1717(d)(3)
2. A plank (12 inches wide) may be used as a walkway while
joists are placed. 1717(d)(5)
E. Fall protection
Periphery rails are required as soon as supporting members
are in place. 1717(d)(4)
Note: The area under formwork is a restricted area and must
be posted with perimeter warning signs. 1717(d)(6)(A)
Guardrails
Guardrails must be installed at the open sides of all work
surfaces that are 7 1/2 ft. or higher above the ground, oor, or
level underneath, or workers must be protected by other fall
protection or, if justied, by a valid fall protection plan. 1621(a)
A. Guardrail specications. 1620
1. Railings shall be constructed of wood or in an equally
substantial manner from other materials, and shall consist
of the following:
a. A wooden top rail that is 42 inches to 45 inches high
and that measures 2 inches x 4 inches or larger.
b. A mid-rail shall measure at least 1 inch x 6 inches and
shall be placed halfway between the top rail and the
oor when there is no wall or the parapet wall is less
than 21 inches high.
c. Screens, mesh, intermediate vertical members, solid
panels, or equivalent members may be used in lieu of a
mid-rail subject to the following:
(1) Screens and mesh shall extend from the top rail
to the oor and along the entire opening between
top rail supports.
(2) The gap between the intermediate vertical
members shall not be greater than 19 inches.
(3) Other intermediate members such as solid panels
shall not have gaps more than 19 inches.
d. Wood posts shall be not less than 2 inches by 4 inches
in cross section, spaced at 8 ft. or closer intervals.
Note: Use only “Selected Lumber”— free from damage that
aects its strength for wood railings. Steel banding and
plastic banding shall not be used as top rails or mid-rails.
2. All railings and components shall be capable of
withstanding a force of at least 200 lbs. applied to the
top rail within 2 inches of the top edge, in any outward or
downward direction, at any point along the top edge.
3. Mid-rails, screens, mesh, intermediate vertical members,
solid panels, and equivalent members shall be capable
of withstanding a force of at least 150 lbs. applied in any
downward or outward direction at any point.
4. The top rail or mid-rail on scaolding platforms may be
substituted by the X-braces (see the Scaolds section in
this guide). 1644(a)(6)
5. The ends of the rails shall not overhang the terminal
posts, except where such overhang does not constitute a
projection hazard. 1620(f)
6. Railings shall be so surfaced as to prevent injury to an
employee from punctures or lacerations and to prevent
snagging of clothing. 1620(g)
B. Guardrail applications
1. Floor and roof openings: 1632(b)(3)
a. Floor, roof, and skylight openings in any work surface
must be guarded by railings and toeboards or by
covers.
b. The cover must be able to support 400 lbs. or twice the
weight of the employees, equipment, and material, and
be securely fastened.
c. Covers must bear a sign with minimum 1-inch letters
stating—OPENING—DO NOT REMOVE.
80 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Hazard Communication Program (HAZCOM) | July 2022 81
d. Employees within 6 ft. of any skylight shall be protected
from falling through the skylight opening by any one of
the following methods:
(1) Guardrails. 3209
(2) Skylight screens. 3212(e)
• Installed above the skylight. 3212(e)(1).
• Installed below the skylight. 3212(e)(2).
(3) Personal fall protection system. 1670
(4) Covers installed over the skylights, including
skylights themselves that meet 3212(b) and 1632.
(5) Skylight nets. 3212(e)(6)
(6) Fall protection plan. 1671.1
Exception: When the work is of short duration and
exposure is limited. 3212(e)
e. Access to surfaces glazed with transparent or
translucent materials are not permitted unless an
engineer certies that the surface will sustain all
anticipated loads. 3212(f)
2. Wall openings: Wall openings must be guarded if there is
a drop of more than 4 ft. and the bottom of the opening is
less than 3 ft. above the working surface. 1632(j)
3. Elevators: Guardrails are required for elevator shaft
openings that are not enclosed or do not have cages.
1633
4. Falsework: Guardrails are required as soon as falsework-
supporting members are in place. 1717(d)(4)
5. Demolition: Wall openings must be protected by guardrails
during demolition except on the oor being demolished
and on the ground oor. 1735(k)
6. Roong operations: Provisions must be made during
roong operations to prevent workers from falling o roofs
20 ft. or higher. 1730(b)(1)
7. Skeleton steel building: A single 3/8-inch wire rope, in
lieu of standard railing, may be used to guard openings
and exposed edges of temporary oors or planking in
skeleton steel buildings. The 3/8-inch wire rope must have
a breaking strength of 13,500 lbs. (min.) and be placed at
42 inches to 45 inches above the nished oor. 1710(l)(3)
Hazard Communication Program
(HAZCOM)
A hazardous chemical is any chemical that is classied as
a physical hazard or a health hazard, a simple asphyxiant,
combustible dust, pyrophoric gas, a hazard not otherwise
classied, or is included in the List of Hazardous Substances
prepared by the Director pursuant to Labor Code section 6382.
These chemicals may include solvents, paints, thinners, cleaning
agents, fresh concrete, and fuels. Employers whose employees
may be exposed to hazardous chemicals are required to have a
HAZCOM program. 5194
A. Employers must develop, implement, and maintain at
the workplace a written HAZCOM program that includes
information on labels, warning, safety data sheets (SDSs),
training requirements, and other relevant information as per
5194.
B. The program must include the following:
1. A list of the hazardous chemicals that are used or stored in
the workplace. It must include any chemicals listed in the
following:
a. The Hazardous Substances List. 339
b. The Code of Federal Regulations (CFR, Part 1910,
Subpart Z).
c. Threshold Limit Values for Chemical Substances in the
Work Environment (ACGIH) latest edition.
d. Chemicals identied and regulated under Title 8,
Article 107, Dusts, Fumes, Mists, Vapors and
Gases, and Article 109, Hazardous Substances and
Processes. 5194(d)(3)
e. T22 CCR 12000 (Proposition 65).
2. Labels and other forms of warning on containers of
hazardous chemicals.
3. Readily accessible SDSs.
4. Procedures for safe handling, use, storage, disposal, and
clean up to protect employees.
Note: All hazardous liquids capable of physical injury on
skin contact must be covered, insulated, or otherwise
guarded against inadvertent contact. When the nature
of the work makes covering or guarding impracticable,
82 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Heat Illness Prevention | July 2022 83
employer must provide personal protective equipment.
3302
5. Training on the hazardous chemicals that employees are
or could be exposed to in the workplace.
6. The methods the employer will use to inform employees
of the hazards of non-routine tasks and the hazards
associated with chemicals contained in unlabeled pipes in
their work areas. 5194(e)(1)(B)
7. Clear and reasonable warnings for exposures to
hazardous chemicals shall be displayed in the workplace
using warning signs and labels or provided through
information and training. 5194. Appendix G #12601(c)
8. For each chemical included in the HAZCOM program,
the information provided on the warning signs and labels
must include all of the required texts as per the T8 CCR
requirements for that specic chemical.
9. A plan for managing multi-employer work-site issues
including the methods used to inform other work-related
employers.
10. A plan for periodically (e.g., annually) evaluating the
eectiveness of the program and for updating the program.
C. The HAZCOM program must be available on request to
employees, their representatives, and Cal/OSHA.
Note: The Guide to the California Hazard Communication
Regulation is available free of charge from Cal/OSHA at:
www.dir.ca.gov/dosh/dosh_publications/hazcom.pdf.
D. Employers must make sure that:
1. Each container of hazardous chemicals in the workplace
is labeled, tagged, or marked. Information can be provided
using labels on shipped containers or with required
information such as product identiers, pictograms,
precautionary and hazard statements, rst aid information,
and signal words. 5194(f)(6)
2. The labels on incoming containers of hazardous chemical
substances are not removed or defaced.
E. Employers are required to: 5194(g)
1. Have an SDS for each hazardous chemical they use.
2. Use SDSs that are consistent with the Globally
Harmonized System (GHS).
3. Make the SDSs readily accessible during each work shift
to employees when they are in their work areas.
F. Employers must provide all required information and training
as per 5194(h) to their employees. The training includes:
1. Labeling, pictograms, symbols, etc.
2. SDSs, including physical and health hazards.
3. Chemical-specic information (must always be available
through labels and SDSs).
4. Location of hazardous chemicals.
5. Where the written HAZCOM program is kept.
6. Detection of presence or release of hazardous chemicals.
7. PPE and appropriate work practices.
8. Emergency and rst aid procedures.
Heat Illness Prevention
Heat illness can be one or more medical conditions including
heat rash, heat cramps, fainting, heat exhaustion, and heat
stroke. Heat illness may be mild initially but can become severe
or fatal if the body temperature continues to rise. Supervisors,
foremen, and employees should look continuously for signs and
symptoms of heat illness in themselves and fellow workers.
To help employers develop, implement, and monitor their heat
illness prevention procedures, Cal/OSHA has provided a number
of materials on heat illness prevention including:
• Educational resources including Employer’s Training Kit
(www.dir.ca.gov/DOSH/HeatIllnessInfo.html)
• eTool (www.dir.ca.gov/dosh/etools/08-006/index.htm)
• Employer’s Sample Procedures (www.dir.ca.gov/dosh/
dosh_publications/HIP-sample-procedures.doc)
• “Protect Yourself from Heat Illness” publication
(www.dir.ca.gov/dosh/dosh_publications/
HeatIllnessEmployeeEngSpan.pdf)
84 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Heat Illness Prevention | July 2022 85
Signs and symptoms of heat illness may include:
Heat Rash (Prickly Heat)—General Symptoms:
• Can cover large parts of the body
• Looks like a red cluster of pimples or small blisters
• Often on the neck, chest, groin, under the breasts, or in
elbow creases
• Feels uncomfortable, can disrupt sleep and work
performance
• Complicated by infections
Heat Cramps—General Symptom:
• Painful muscle spasms in the stomach, arms, legs, and
other body parts (may occur after work or at night)
Fainting—General Symptoms:
• Sudden dizziness, light-headedness
• Unconsciousness
Notes:
» Provide first aid immediately
» Never give liquids to an unconscious person
Heat Exhaustion—General Symptoms:
• Heavy sweating, painful muscle cramps, extreme
weakness and/or fatigue
• Nausea, vomiting, dizziness, headache
• Body temperature normal or slightly high
• Fainting
• Pulse fast and weak
• Breathing fast and shallow
• Clammy, pale, cool, and/or moist skin
Note: Heat exhaustion can occur because of high core body
temperature even when an individual is well hydrated.
Heat Stroke—General Symptoms:
• No sweating; the body cannot release heat or cool down
• Mental confusion, delirium, convulsions, dizziness
• Hot and dry skin (e.g., red, bluish, or mottled)
Muscles may twitch uncontrollably
Pulse can be rapid and weak
Throbbing headache, shallow breathing, seizures/ts
Unconsciousness and coma
Body temperature may range from 102–104˚F or higher
within 10–15 minutes
•
•
•
•
•
Note: A heat stroke victim may die within 30 to 60 minutes
unless treated properly, and survivors may have some
degree of permanent neurological impairment.
Requirements and guidance for heat illness prevention in the
workplace:
A. All employers who have employees working in outdoor
places of employment must have a written heat illness
prevention plan and implement eective procedures for the
prevention of heat illness.
B. The plan must be employer-specic and be available on site
or immediately available on request of the employee or the
Division.
C. Heat illness prevention plan, at a minimum, must include:
3395(i)
1. Procedures for providing sucient water
2. Procedures for providing access to shade
3. High-heat procedures
4. Emergency response procedures
5. Acclimatization methods and procedures
D. The plan shall be in writing in both English and the language
understood by the majority of the employees.
E. Procedures for providing sucient water. 3395(c)
1. Sucient amounts of fresh, pure, and suitably cool potable
water shall be available at all times.
2. Provide at least one quart per employee per hour for the
entire shift.
3. If individual water containers are provided, the containers
must be clean, and a source of potable water must be
readily available.
86 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Heat Illness Prevention | July 2022 87
4. Water from unpermitted/unlicensed or non-tested water
sources must not be used.
Notes:
Permits for public water systems are granted by the California
State Water Resources Control Board (
)
www.waterboards.
ca.gov/drinking_water/certlic/ drinkingwater/Permits.shtml
5. If hoses or connections are used, they must meet the
requirements for potable drinking water system as per
California Health and Safety Code section 114205–
114242.
6. During hot weather, the water must be cooler than the
ambient temperature.
Note: Do not have water so cool as to cause discomfort.
7. Place water as close as practicable to where employees
are working. For example, on a multi-story construction
site, place water in a safely accessible location on every
oor where employees are working.
8. Remind workers to drink water often and not to wait until
they are thirsty to drink.
9. Provide water at no cost to the workers.
F. Procedures for providing access to shade. 3395(d)
Provide shade to employees during breaks and preventative
cool down rest periods by taking following measures.
1. When outdoor temperature is 80˚F or less:
a. Have shade available and provide shade or timely
access to shade upon request.
b. It helps to have the shade erected if the weather is hot
enough that the shade can help employees to cool o.
2. When outdoor temperature exceeds 80˚F:
a. Have one or more areas with shade at all times while
employees are present. If no other shade is readily
available, erect shade structures immediately.
b. It is a good idea to set up the shade in advance if at
5:00 p.m. the night before, the temperature is predicted
to exceed 80˚F.
3. Perform frequent checks of the temperature at the
worksite because you need to set up the shade
immediately if the temperature exceeds 80˚F. It is a good
idea to check the temperature hourly.
4. Place the shade structure as close as practicable to the
areas where employees are working.
5. Shade must be either open to the air or provided with
ventilation or cooling, and must be easy for employees to
reach.
6. Permit employees to access shade at all times.
7. Provide enough shade to accommodate all employees:
a. who are on recovery and rest period breaks, and
b. who choose to remain in areas designated for recovery
and rest periods during their meal periods.
8. Erect additional structures on an as-needed basis.
9. Encourage employees to take a cool-down rest in the
shade when they feel the need to do so to protect
themselves from overheating.
10. Have water available in the rest area so that employees
are encouraged to drink more water.
11. When it is not possible to erect a shade structure, you
may provide alternative cooling measures that oer
equivalent protection. Exceptions to 3395(d)(1) and (d)(2)
12. Monitor the employee on cool-down rest and ask if he
or she is experiencing any symptoms of heat illness,
including simple fatigue.
13. If an employee exhibits or complains of any sign or
symptom of heat illness, initiate rst-aid procedures
without delay.
14. Encourage the employee on cool-down rest to remain in
the shade for 5 or more minutes as needed.
G. High-heat procedures: 3395(e)
1. Implement high-heat procedures when the temperature
equals or exceeds 95˚F.
2. Train all employees to recognize the signs and symptoms
of heat illness and allow them to call for emergency
medical services when necessary.
3. Train all employees to stay in contact, observe each
other, and immediately report any signs/symptoms of heat
illness.
88 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Heat Illness Prevention | July 2022 89
4. Observe and monitor employees for alertness and signs or
symptoms of heat illness by implementing one or more of
the following:
a. Supervisor or designee observation of 20 or fewer
employees
b. Mandatory buddy system
c. Regular communication with sole employee using radio
or cellular phone
d. Other eective means of observation
(1) Contact employees regularly.
(2) Designate one or more employees on each
worksite as authorized to call for emergency
medical services.
5. Remind employees throughout the work shift to drink
plenty of water.
6. Provide close supervision to new employees as they may
have less or no acclimatization.
7. Conduct pre-shift meetings to review the high-heat
procedures and to remind employees to drink plenty of
water and take a cool-down rest when necessary.
H. Emergency response procedures: 3395(f)
Employers are required to implement eective emergency
response procedures in the workplace. Requirements and
guidance include the following:
1. Maintain eective communication by voice, observation, or
electronic means.
2. Take immediate action if any signs or symptoms of heat
illness in any employee is observed or reported.
3. Implement emergency response procedures if the signs or
symptoms indicate severe heat illness.
4. Do not leave the employee exhibiting signs or symptoms
of heat illness alone or send them home without oering
onsite rst aid and/or providing emergency medical
services.
5. Contact emergency medical services and, if necessary,
transport employees to a place where they can be
reached by an emergency medical provider.
6. In the event of an emergency, make sure that clear
and precise directions to the worksite are provided to
emergency responders.
7. If you have mobile crews, provide the emergency medical
provider a map of the crew’s location or detailed direction.
I. Acclimatization methods and procedures 3395(g)
1. Make sure that all employees are observed by a
supervisor or designee during a heat wave.
Note: A “heat wave” means any day in which the predicted
high temperature for the day will be at least 80˚F and at
least 10˚F higher than the average daily high temperature
in the preceding 5 days.
2. Have a supervisor or designee closely observe any
employee who has been newly assigned to a high heat
area for the rst 14 days of the employment.
3. Be extra-vigilant in employee monitoring during heat
waves and when new employees are on the job.
J. Training of employees and supervisors 3395(h).
1. Training of employees and supervisors in your heat illness
prevention plans and procedures is extremely important
for the prevention of heat illness at the workplace.
2. Make sure that employees and supervisors are trained
before any anticipated exposure to the risk of heat illness.
3. Provide training when an employee is hired.
4. Provide refresher training as needed.
Note: Training that is given close in time to the hot season
is more eective than training given during colder seasons
without follow-up refresher training.
5. Cover general and site/work-specic topics in the training
including:
• All procedures in your heat illness prevention plan,
including procedures for providing water, shade and
cool-down rests, high heat, emergency response, and
acclimatization
• The concept, importance, and methods of
acclimatization
• The dierent types of heat illness and the common
signs and symptoms of heat illness
• Appropriate rst aid and/or emergency response for the
90 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Heavy Construction Equipment | July 2022 91
dierent types of heat illness, and how to access
Ensure that the work procedures are consistent with
the information provided in the training
Give rst aid for heat exhaustion, lay the person down at
in a cool environment, loosen their clothing, and give them
plenty of water to drink.
Ways to prevent heat illness also include:
Monitoring the weather forecast ahead of time and
planning accordingly.
Timing the heaviest workload for the coolest part of the
workday.
For more information on Heat Illness Prevention, see Cal/OSHA’s
Heat Illness Prevention eTool at www.dir.ca.gov/dosh/etools/08-006/
index.htm.
3. Starting work early in the morning.
4. Providing training on heat stress including prevention,
recognition, and rst aid as a part of the employer’s IIPP.
3203, 3400, 3439
2.
1.
L.
2. Give rst aid for heat stroke, immediately start aggressive
cooling of the person and get them to a hospital right
away. Cooling can include placing cool wet towels on the
trunk, arms, and legs while refreshing the cooling towels
every few minutes.
1.
K. Have a suitable number of trained persons to render rst
aid. Typical rst aid methods for heat exhaustion and heat
stroke:
• Maintain records of the training
•
• Provide the training in a language the employees
understand
Heavy Construction Equipment
Safety requirements for heavy construction equipment are as
follows:
A. General repairs must not be made to powered equipment
until workers are protected from movement of the equipment
or its parts. 1595(a)
B. Before repairs are made, workers must comply with lock-out/
block-out requirements if applicable. 3314
C. Wherever mobile equipment operation encroaches on a
public thoroughfare, a system of trac controls must be
used. 1598(a)
D. Flaggers are required at all locations where barricades and
warning signs cannot control the moving trac 1599(a).
(See exceptions in the “California Manual on Uniform Trac
Control Devices for Streets and Highways, January 13,
2012” [the Manual], published by Caltrans.)
Flaggers shall wear high-visibility safety apparel and
headwear manufactured in accordance with ANSI/ISEA
standards 1599(d). Also, all employees (on foot) such as
grade-checkers, surveyors, and others exposed to the
hazard of vehicular trac, shall wear high-visibility safety
apparel in accordance with the requirements of 1598 and
1599. 1590
E. Jobsite vehicles must be equipped with the following:
1. Operable service, emergency, and parking brakes.
1591(c), 1597(a)
2. Two operable headlights and taillights for night operation.
1597(b)
3. Windshield wipers and defogging equipment as required.
1597(d)
4. Seat belts if the vehicle has rollover protection structures.
1597(g)
5. Fenders or mud aps. 1591(f), 1597(i)
6. Adequate seating if the vehicles are used to transport
employees. 1597(f)
7. If an exhaust retrot is installed on a vehicle, it shall be
installed and maintained as per 1591(m).
F. Vehicles and systems must be checked for proper operation
at the start of each shift. 1597(j)
G. Rollover protection structures and seat belts must be
installed for:
1. The following equipment having a brake horsepower rating
above 20. 1596(a)(1)
a. Bulldozer
b. Front-end loader
92 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Hot Pipes and Hot Surfaces | July 2022 93
c. Motor grader
d. Scraper
e. Tractor (except side boom pipe laying)
f. Water wagon prime mover
2. The following equipment:
a. Rollers and compactors weighing more than 5,950 lbs.
1596(a)(2)
Exceptions: See 1596(a)(2)(B)
b. Sheepsfoot-type rollers and compactors. 1596(a)(2)(A)
c. Crawler tractor. 3666
H. Haulage and earth-moving equipment safety requirements
are as follows:
1. Every vehicle having a body capacity of 2.5 cu. yds. or
more must be equipped with an automatic backup alarm
that sounds immediately on backing. 1592(a)
2. All other vehicles operating when rear vision is blocked
must be equipped with an automatic backup alarm or its
equivalent. 1592(b)
3. All vehicles must be equipped with a manually operated
warning device. 1592(c)
4. Haulage vehicles in operation must be under operator
control and must be kept in gear when descending grades.
1593(b)
5. The brakes on a haulage vehicle must meet the criteria
specied by the CSOs. 1591(c)
6. The control devices on a haulage vehicle must be
inspected at the beginning of each shift. 1593(d)
7. Exposed scissor points on front-end loaders must be
guarded. 1593(i)
8. Engines must be stopped during refueling. 1594(a)
9. Lights are required for night operation. 1591(g)
10. Vehicles loaded by cranes, shovels, loaders, and similar
devices must have an adequate cab or canopy for operator
protection. 1591(e)
11. Dust control is required when dust seriously limits visibility.
1590(b)
12. In dusty operations, equipment operators shall use
adequate respiratory protection. 1590(b)
13. Loads on vehicles must be secured from displacement.
1593(f)
14. If an exhaust retrot is installed, install and maintain as
per 1591(m).
I. Safety requirements for industrial trucks and tractors include:
1. Posting and enforcing by employers using industrial trucks
or industrial tow tractors a set of operating rules including
the appropriate rules listed in GISO 3650(t), 3664(a).
2. Providing operating instructions at the time of initial
assignment and at least annually thereafter. 3664(b)
3. Using the locking device where the dump body of a truck
is raised for work. 1595(b)
4. Performing repair work only when there is no possibility
of sudden movements or operation of the equipment or
its parts. Keeping all controls in a neutral position, with
the engine(s) stopped and brakes set, unless work being
performed requires otherwise. 1595(a)
Hot Pipes and Hot Surfaces
A. Cover all hot pipes and hot surfaces with a thermal insulating
material or keep them guarded against contact when they
are at 140˚F (60˚C) or higher and located within:
• 7 ft. measured vertically from oor or working level or
• 15 inches measured horizontally from stairways, ramps or
xed ladders. 3308
Note: This order does not apply to operations where the
nature of the work or the size of the parts makes guarding or
insulating impracticable. 3308
B. Check for leaks from pipelines and ensure the leaks are
stopped before working near them. The energy within the
piping system must be controlled to prevent an uncontrolled
release that could cause injury. 3329
94 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Injury and Illness Prevention Program | July 2022 95
Housekeeping/Site Cleaning
Housekeeping is a term used to describe the cleaning of the
work site and surrounding areas of construction project-related
debris. The term also refers to the managing and storing of
materials that are used on the project. Listed below are the
general requirements for housekeeping to which all work sites
are subject.
It is important to remember that work sites subject to specic
SOs may have additional housekeeping requirements with which
to comply.
A. Work surfaces, passageways, and stairs shall be kept
reasonably clear of scrap lumber and debris. 1513(a)
B. Ground areas within 6 ft. of buildings under construction shall
be kept reasonably free of irregularities. 1513(b)
C. Storage areas and walkways on construction sites shall be
kept reasonably free of dangerous depressions, obstructions,
and debris. 1513(c)
D. Piled or stacked material shall be placed in stable stacks to
prevent it from falling, slipping, or collapsing. 1549(a)
E. Material on balconies or in other similar elevated locations
on
the exteriors of buildings under construction shall be
placed, secured, or positively barricaded in order to
prevent the
material from falling. 1549(h)
Injury and Illness
Prevention Program
An Injury and Illness Prevention Program (IIPP) is required at all
work sites. The program is considered eective if it satises the
regulatory requirements of 3203 and helps the employer and the
employee to identify and control the hazards specic to their
work site. Following is a summary of the regulatory requirements.
A. The IIPP must be in writing and must include the following
elements: 1509(a), 3203(a)
1. The employer’s assignment of responsibilities. 3203(a)(1)
2. A system for ensuring employee compliance with safe
work practices. 3203(a)(2)
3. A system for two-way communication between employers
and employees about safety issues. 3203(a)(3)
4. Scheduled inspections and an evaluation system to identify
hazards. 3203(a)(4)
5. An accident investigation process. 3203(a)(5)
6. Procedures for correcting unsafe and unhealthy
conditions. 3203(a)(6)
7. Safety and health training. 3203(a)(7)
8. Employee access to the written IIPP. 3203(a)(8)
9. Recordkeeping. 3203(b)
B. Other IIPP requirements for construction are as follows:
1. Employers must adopt and post a Code of Safe Practices
at each job site. Plate A-3 in Appendix A of the CSOs
illustrates a general format. 1509(b), (c)
2. Periodic meetings of supervisors must be held to discuss
the safety program and accidents that have occurred.
1509(d), 3203
3. Supervisors must conduct tailgate or toolbox safety
meetings at least every 10 working days; however, weekly
meetings are recommended. 1509(e)
C. Required safety training for employees includes the following:
1. New workers shall be instructed in safe work practices,
job hazards, and safety precautions and shall be required
to read the Code of Safe Practices. 1510(a)
2. The employer shall permit only qualied or experienced
employees to operate equipment or machinery. 1510(b)
3. Workers shall be instructed in the following:
a. The recognition of job site-specic hazards
b. Procedures for protecting themselves
c. First aid procedures in the event of injury. 1510(c)
D. General safety requirements are as follows:
1. No worker shall be required or permitted to work in an
unsafe workplace. 1511(a)
2. Before starting work, the employer shall survey the job site
for hazards and use necessary safeguards to ensure that
work is performed safely. 1511(b)
E. Specic requirements are as follows:
If an employer is subject to specic safety orders, the
96 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Ladders | July 2022 97
requirements of these SOs must be considered when
developing the employer’s IIPP. These SOs may include
specic procedures or processes as well as requirements for
reporting, training, exposure limits, personal protection, and
registration and certication.
F. Employees have numerous rights under the IIPP, including
the following: 3203(a)
1. The right to work in a safe and healthful workplace
2. The right to inform the employer of workplace hazards
without fear of reprisal
3. The right to receive training that is readily understandable
4. The right to access and receive a copy of the written IIPP
G. To ensure the eectiveness of the IIPP:
1. Supervisors should be qualied in safety procedures and
held accountable.
2. The eectiveness of the safety program should be
monitored.
H. Create your written IIPP using the following resources:
1. IIPP publications (www.dir.ca.gov/dosh/PubOrder.
asp#IIPP) on Cal/OSHA’s website are provided to help
you develop or improve your IIPP. To develop a written
IIPP customized to your workplace, answer the IIPP
questions in the IIPP Builder or use the applicable model
program.
2. “The Guide to Developing Your Workplace Injury and
Illness Prevention Program” is available online at
www.dir.ca.gov/dosh/dosh_publications/iipp.pdf.
Ladders
Falls are the most common cause of worker injury associated
with ladder use. Falls are mostly caused by the (1) use of faulty
ladders; (2) improper set-up of a ladder; or (3) incorrect use of
ladders.
Except where either permanent or temporary stairways or
suitable ramps or runways are provided, ladders shall be used to
give safe access to all elevations. 1675(a)
A. General requirements for ladders:
1. Portable ladders shall comply with T8 CCR 3276, 1675(b).
2. Design and construction of portable ladders shall comply
with T8 CCR 3276(c).
3. Fixed ladders shall comply with T8 CCR 3277 and 3278,
1675(c).
4. Wood parts of xed ladders shall meet the requirements of
T8 CCR 3276(c), 3277(c)(5).
5. Extension ladders shall comply with 3276(e)(16).
6. Portable metal ladders shall comply with 3276.
7. Portable wood ladders shall comply with 3276.
8. Portable reinforced plastic ladders shall comply with
3276(c), (e).
9. Single-rail ladders shall not be used.
B. Portable ladders are generally designed for one-person
use to meet the requirements of the person, the task, and
the environment. When selecting a ladder for use, consider
the ladder length, height, the working load, the duty rating,
worker position, and how often the ladder is used.
3276(d)(1)(B)
C. Double-cleat ladders are required for two-way trac or when
25 or more employees are using a ladder. Double-cleat
ladders shall not exceed 24 ft. in length. 1629(c)
D. Maximum lengths of portable ladders shall not exceed the
following: 3276(e)(16)(D)
Ladder Type Maximum Length (Feet)
Step ladder 20
Two-section extension ladder (wood) 60
Two-section extension ladder (metal) 48
Three-section extension ladder (metal) 60
Two-section extension ladder (reinforced plastic) 72
Painter’s step ladder 12
Cleat ladder 30
Single ladder 30
Ladder Size (Feet) Minimum Overlap (Inches)
Up to and including 32
Over 32, up to and including 36
Over 36, up to and including 48
Over 48, up to and including 60
36
46
58
70
E. Minimum overlap in two-section portable extension ladders
shall not be less than the following: 3276(e)(16)(E)
F. Portable ladders shall be used according to the following duty
classications: 3276(
d)(2)
Duty Rating Ladder
Type
W
orking Load
(Pounds)
Special Duty IAA 375
Extra Heavy-
Duty
IA 300
Heavy-Duty
I
250
Medium-Duty
II 225
Light-Duty
III 200
G. All portable ladders used in outdoor advertising structures
shall be at least Type I, Type IA or Type IAA as designed and
constructed in accordance with T8 CCR 3276, 3413(a).
H. Job-built ladders must meet the following requirements:
1. Job-built ladders must safely support the intended load.
1676(a)
2. Cleats must be made from clear, straight-grained lumber
and must be uniformly spaced 12 inches apart vertically.
1676(c)
3. Cleats must be nailed at each end with three 10d nails or
the equivalent. 1676(j)
4. Cleats must be blocked or notched into the side rails.
1676(j)
5. The width of single-cleat ladders shall be 15 inches to 20
inches. 1676(f)
6. Rails must be made from select Douglas Fir without knots
(or the equivalent). 1676(b)
7. Rail splicing is permitted only when there is no loss of
strength to the rail. 1676(b)
8. Single-cleat ladders must not exceed 30 ft. in length.
1676(e)
9. Double-cleat ladders must not exceed 24 ft. in length.
1676(d)
I. Portable Ladders
1. Inspection and maintenance requirements are below:
a. Ladders shall be inspected by a Qualied Person for
visible defects frequently and after any occurrence that
could aect their safe use. 3276(e)(2)
b. Ladders shall be maintained in good condition at all
times. 3276(e)(2)
c. Metal ladders shall not be exposed to acid or alkali
materials that are capable of corroding the ladder and
reducing the ladder’s strength, unless recommended
otherwise. 3276(e)(1)
d. Remove ladders that have developed defects, such
as broken or missing steps, rungs, cleats, safety feet,
side rails, or other defects from service, and tag or mark
them “Dangerous, Do Not Use.” 3276(e)(3)
e. All ladders shall be free of oil, grease, or slippery
materials. Wood ladders shall not be painted with other
than a transparent material. 3276(e)
2. Prohibited uses of portable ladders are given below:
a. Ladders shall not be used as a brace, skid, guy or gin
pole, gang-way, or for uses they were not intended for,
unless recommended by the manufacturer. 3276(e)(16)
b. Do not place planks on the top cap. 3276(e)(16)(B)
c. Step ladders shall not be used as single ladders or in
the partially closed position. 3276(e)(16)(C)
3. To safely use portable ladders, employees must also follow
the requirements noted below:
a. All portable ladders used for window washing shall be
equipped with nonslip devices. Middle and top sections
shall not be used as bottom sections unless equipped
with nonslip bases. 3287(b)(2)
b. Portable ladders shall not be overloaded when used.
3276(e)(6)
c. The base of ladders shall be placed on a secure and
level footing. Ladders shall not be placed on unstable
bases. 3276(e)(7)
d. Ladders shall not be used on ice, snow, or slippery
98 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Ladders | July 2022 99
surfaces unless slippage is prevented. 3276(e)(7)
e. The top of a non-self-supporting ladder shall be placed
with two rails supported equally, unless a single support
attachment is provided and used. 3276(e)(8)
f. Non-self-supporting ladders shall, where possible,
be used so that the horizontal distance from the top
support to the foot of the ladder is one-quarter of the
working
length of the ladder. 3276(e)(9)
g. The ladder shall be so placed as to prevent slipping, or
it shall be tied, blocked, held, or otherwise secured to
prevent slipping. 3276(e)(9)
h. Ladders shall not be used in a horizontal position as
platforms, runways, or scaolds unless designed for
such use. 3276(e)(9)
i. When two or more separate ladders are used to reach
an elevated work area, the ladders shall be oset
with a platform or landing between the ladders (see
exceptions). 3276(e)(10)
j. Extend ladder side rails to at least 3 ft. above the
landing unless handholds are provided. 1629(c)(3),
3276(e)(11)
k. Do not tie ladders together to provide longer sections
unless the ladders are designed for such use and
equipped with the necessary hardware ttings.
3276(e)(12)
l. Extension ladders shall be erected so that the top
section is above and resting on the bottom section with
the rung locks engaged. 3276(e)(13)
m.Do not place ladders in passageways, doorways,
driveways, or any location where they may be
displaced unless protected by barricades or guards.
3276(e)(14)
n. Climb or work with the body near the middle of the
step or rung and do not overreach from this position. To
avoid overreaching, the employee shall descend and
reposition the ladder. 3276(e)(15)(A)
o. Employees shall be prohibited from carrying equipment
or materials that prevent the safe use of ladders.
3276(e)(15)(B)
p. Face the ladder while climbing and descending, and
maintain contact with the ladder at three-points at all
times. 3276(e)(15)(C)
q. Do not stand and work on the top three rungs of single
or extension ladders. 3276(e)(15)(D)
r. Employees shall not sit, kneel, step, or stand on the
pail shelf, topcap, or the step below the topcap of a
stepladder. 3276(e)(15)(E)
Exception: Employees may stand on the step below the
topcap if it is located 18 inches under the topcap.
s. Do not use the X-bracing on the rear section of a
stepladder for climbing unless the ladder is so designed
and provided with steps for climbing on both front and
rear sections. 3276(e)(15)(F)
t. Ladders shall not be moved or extended while
occupied, unless designed and recommended by the
manufacturer. 3276(e)(15)(G)
u. Portable rung ladders with reinforced rails shall be used
only with the metal reinforcement on the underside.
3276(e)(17)
v. Non-conductive ladders shall be used in locations
where the ladder or user may contact unprotected
energized electrical conductors or equipment.
Conductive ladders shall be legibly marked with
signs reading—“CAUTION -- DO NOT USE AROUND
ELECTRICAL EQUIPMENT” or equivalent. 3276(e)(18)
w. The area around the top and bottom of a ladder shall be
kept clear. 3276(e)(19)
J. Fixed Ladders
To safely use xed ladders, employees must also follow the
requirements noted below:
1. Do not carry equipment or materials that prevent the safe
use of ladders. 3278(a)
2. Fixed ladders shall be inspected before use. Any ladder
determined to be unsafe shall not be used. 1511(b)
3. Face the ladder when ascending and descending. 3278(a)
4. Always use both hands when climbing up or down the
ladder. 3278(a)
5. Do not use single-rail ladders. 3278(a)
K. The following are training requirements for employees using
portable ladders: 3276(f)
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1. Employees shall be trained in the safe use of ladders
before using them.
2. Supervisors of employees who routinely use ladders shall
also be trained in ladder safety training.
3. The training may be provided as part of the employer’s
IIPP (T8 CCR 3203).
4. The training shall address the following topics, unless the
employer demonstrates that a topic is not applicable to
the workplace:
a. Importance of using ladders safely, including discussion
of injuries due to falls from ladders. 3276(f)(1)
b. Selection of ladders, including types, proper length,
maximum working loads, and electrical hazards.
3276(f)(2)
c. Maintenance, inspection, and removal of damaged
ladders from service. 3276(f)(3)
d. Erecting ladders, including footing support, top support,
securing, and angle of inclination. 3276(f)(4)
e. Climbing and working on ladders, including user’s
position and points of contact with the ladder.
3276(f)(5)
f. Causes of falls, including haste, sudden movement,
lack of attention, footwear, and user’s physical
condition. 3276(f)(6)
g. Prohibited uses, including climbing on cross bracing,
uses other than designed, exceeding maximum
lengths, and not meeting minimum overlap
requirements. 3276(f)(7)
L. It is a good idea to make sure that the stepladder is properly
set up and that the spreader is in the locked position before
use.
Laser Equipment
The primary hazard of using laser equipment is injury to the
eyes. The following are selected regulatory requirements:
A. Only qualied persons may operate laser equipment. 1801(a)
B. Equipment must be turned o or shielded when unattended
and not in use. 1801(e)
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C. Laser beams must never be pointed or directed at persons.
1801(g)
D. Lasers must have a label indicating their maximum output.
1801(i)
E. Employees who have potential exposure to direct or
reected laser light greater than 5 milliwatts shall be provided
with anti- laser eye protection as specied in section 3382(e),
1801(c).
F. Warning signs and labels (in accordance with ANSI) must be
posted in areas where lasers are used. 1801(d)
Lead
Occupational exposures to lead can occur in construction
activities, such as plumbing system retrots; the spraying,
removal, or heating of paint that contains lead; and the welding,
cutting, and grinding of lead-containing construction materials.
Occupational lead exposures can aect workers as well as
family members and friends who come in contact with the “take-
home” lead on the worker’s clothing, hair, hands, etc. The toxic
eects of lead on the human body have been well documented
and include damage to the kidneys, brain, and reproductive
organs that, in turn, causes the loss of kidney function, sterility,
decreased fertility, and birth defects and mental retardation in
ospring.
Because of the serious, and in many cases life threatening,
health eects of lead, the employer must be thoroughly
knowledgeable about the regulations to protect people from lead
exposure before their employees engage in any work exposing
them to lead. 1532.1
A. Cal/OSHA enforces the “Lead in Construction Safety Orders,”
which make employers responsible for the following: 1532.1
1. For each job site, the lead hazard must be assessed.
1532.1(d)(1)
2. Where lead is present, the following is required:
a. Lead dust must be controlled by HEPA vacuuming, wet
cleanup, or other eective methods. 1532.1(h)
b. The employer shall ensure that food, beverage, and
tobacco products are not present or used in areas
where employees are exposed to lead above the
PEL. The employer shall provide hygiene facilities
Lead | July 2022 103
for changing, showering, eating, and hand washing.
1532.1(i)
c. Workers shall have access to labels on containers of
lead and safety data sheets, and must be trained as
per 5194 and 1532.1, 1532.1(l)(1)(A).
d. The employer shall implement a written compliance
program to control hazardous lead exposures.
1532.1(e)
e. The employer shall provide the worker with and require
the use of appropriate personal protective equipment.
1532.1(f), (g)
f. The employer shall ensure that all protective clothing
is removed at the completion of a work shift only in
change areas provided for that purpose. 1532.1(g)
B. The permissible exposure limits (PELs) for airborne lead
are 0.05 milligrams per cubic meter of air (mg/m
3
) and an
action level of 0.03 mg/m
3
, both as an 8-hour time-weighted
average (TWA). 1532.1(b)(c)
C. Trigger tasks are certain highly hazardous tasks that carry
the presumption of airborne exposure above the PEL. They
require special protective measures until it is determined that
worker airborne exposures to lead are below levels specied
in 1532.1.
Following are the three levels of trigger tasks (as provided
in Cal/OSHA’s “Lead in Construction” fact-sheet [www.dir.
ca.gov/dosh/dosh_publications/lead-fct-sheet rev.pdf])
involving lead-containing materials and their associated
respirator requirements: 1532.1(d)(2)
1. Level 1 trigger tasks: Spray painting, manual demolition,
manual scraping or sanding, using a heat gun, and power
tool cleaning with dust collection system.
• Minimum respirator requirement: a half-mask respirator
with N100, R100, or P100 lters
2. Level 2 trigger tasks: Using lead-containing mortar;
burning lead; rivet busting; cleaning power tools without
a dust collection system; using dry, expendable abrasives
for clean-up procedures; moving or removing an abrasive
blasting enclosure.
• Minimum respirator requirement: A full-face mask
respirator with N100, R100, or P100 lters; a supplied-
air hood or helmet; or a loose-tting hood or helmet
with a powered air-purifying respirator with N100,
R100, or P100 lters
3. Level 3 trigger tasks: Abrasive blasting, welding, cutting,
or torch burning on structures
• Minimum respirator requirement: A half-mask supplied-
air respirator operated in a positive pressure mode
D. Protective requirements for all trigger tasks and any other
task that may cause a lead exposure above the PEL include
the following:
1. Respirators, protective equipment, and protective clothing.
1532.1(f), (g)
2. Clothing change areas and a shower. 1532.1(i)
3. Initial blood tests for lead and zinc protoporphyrin.
1532.1(j)
4. Basic lead hazard, respirator, and safety training. 1532.1(l)
5. The employer shall post the following warning signs in
each regulated area or work area where an employee’s
exposure to lead is above the PEL. 1532.1(m)(1)(a)
DANGER
LEAD WORK AREA
MAY DAMAGE FERTILITY OR THE UNBORN CHILD
CAUSES DAMAGE TO THE CENTRAL NERVOUS SYSTEM
DO NOT EAT, DRINK OR SMOKE IN THIS AREA
Note: The above protective requirements must be enforced
until worker airborne exposures are shown to be below
levels specied in 1532.1.
E. Blood lead monitoring is especially important for evaluating
work and hygiene practices that may result in lead ingestion.
Employees whose blood lead levels exceed specied limits
must be removed from the work with exposure to lead at or
above the action level. These workers must be provided with
normal earnings, seniority, and other employee rights and
benets for 18 months or until the job from which they were
removed is discontinued, whichever occurs rst. Mandatory
medical removal of an employee due to lead (or other
regulated chemicals) must be recorded on the Log 300 with
a check in the “poisoning” column. 1532.1(k)(2), 14300.9
F. Employer shall notify an employee whose blood lead level
is at or above 40 μg/dl that medical removal protection with
benets is required when a blood lead level is at or above 50
104 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Lead | July 2022 105
μg/dl. 1532.1(j)(2)(D)(2)
Note: Many physicians are now choosing to place
employees on medical removal protection at blood lead
levels above 20 μg/dl, rather than 50 μg/dl. Thus, employers
should target for the 20 μg/dl level as they evaluate the BLL
results.
G. Feasible engineering and work practice controls must be
implemented to maintain employee exposures to lead below
the PELs.
H. A written compliance program that details how lead
exposures will be controlled is required. 1532.1(e)
I. On jobs at residential and public-access buildings, workers
whose exposures to lead measure above the PELs and
their supervisors must receive state-approved training and
certication by the California Department of Health Services.
J. Records of air monitoring, blood lead testing, and medical
removal must be maintained. 1532.1(n)
K. Employers who conduct lead work listed in 1532.1(d)(2)
must notify the Division, in writing, at least 24 hours before
the start of work. 1532.1(p)
L. The “LEAD-WORK PRE-JOB NOTIFICATION” form with
required information is available from Cal/OSHA at
www.dir.ca.gov/DOSH/leadnotication.pdf
Lighting
A. Proper illumination is important in all construction activities.
Construction areas, ramps, corridors, oces, shops, storage
areas, etc., shall be lighted to not less than the minimum
illumination intensities in the following table while work is in
progress: 1523(a)
106 Cal/OSHA Pocket Guide for the Construction Industry | July 2022
Table 2 | Minimum Illumination Intensities in Foot-
Candles
Foot Candles Area of Operation
3 General construction area lighting low
activity
5 Outdoor active construction areas,
concrete placement, excavation and
waste areas, access ways, active storage
areas, loading platforms, refueling, and
eld maintenance areas
5 Indoors: Warehouses, corridors, hallways,
stairways, and exit-ways
10 General construction plant and shops
(e.g., batch plants, screening plants,
mechanical and electrical equipment
rooms, carpenter shops, rigging lofts
and active storerooms, barracks or living
quarters, locker or dressing rooms, mess
halls, indoor toilets, and workrooms)
10 Nighttime highway construction work
30 First aid stations, inrmaries, and oces
B. Nighttime highway construction work lighting shall be
provided within the work zone to illuminate the task(s) in
a manner that will minimize glare to work crews and not
interfere with the vision of oncoming motorists. 1523(b)
Lock-out/Block-out Procedures
Every year many employees are injured or lose their lives when
the equipment they are repairing or maintaining is turned on
by a coworker or when potential energy is released while the
employee is in harm’s way of the equipment. Employees shall
be trained and made familiar with the safe use and maintenance
of all machinery or equipment. To prevent such injuries, SOs
require that a lockout/block-out procedure must be followed.
A. For cleaning, repairing, servicing, setup, or adjusting
operations the following applies: GISO 3314
1. Cleaning, servicing, or adjusting operations 3314(c)
a. Machinery or equipment capable of movement shall be
stopped, and the power source shall be de-energized
Lock-out/Block-out Procedures | July 2022 107
or disengaged.
b. Moveable parts shall be mechanically blocked or locked
out.
c. If the equipment must move during cleaning, servicing
or adjusting operations, the employer shall provide and
require the use of extension tools or other means to
protect employees from injury due to the movement.
Employees shall be trained on the safe use and
maintenance of such tools or means. 3314(c)(1)
2. Repair work or setup operations. 3314(d)
a. Equipment that has lockable controls or that is readily
adaptable to lockable controls shall be locked out or
positively sealed in the o position.
b. For equipment not equipped with lockable controls or
readily adaptable to lockable controls, positive means
must be taken, such as de-energizing or disconnecting
the equipment from its source of power, or other action
which will eectively prevent the equipment from
inadvertent movement or release of stored energy.
3. Accident prevention signs or tags shall be placed on the
controls of equipment, machines, and prime movers.
3314(c), (d)
4. A written hazardous energy control procedure shall be
developed and used by the employer. 3314(g)
a. Energy control procedure must include separate
procedural steps for the safe lockout/tagout of each
machine.
5. When servicing and/or maintenance is performed by a
crew, craft, department, or other group, they shall utilize
a procedure which aords the employees a level of
protection equivalent to that provided by the utilization of a
personal lockout or tagout device. 3314(h)
6. Specic hazardous energy control procedures must be
utilized during shift or personnel changes to ensure the
continuity of lockout or tagout protection, including, but not
necessarily limited to, provision for the orderly transfer of
lockout or tagout device protection between o-going and
oncoming employees, in order to minimize exposure to
hazards from the unexpected energization or start-up of
the machine or equipment, or the release of stored energy.
3314(i)
7. The employer is required to conduct a periodic inspection
of the energy control procedures(s) at least annually to
evaluate their continued eectiveness and determine
necessity for updating written procedures. 3314(j)
8. Energy control procedures for controlling energy sources
in electrical power generation installations and related
equipment for communication or metering shall be in
accordance with 2940.13
9. De-energizing procedures of transmission/distribution
lines and equipment for the purpose of protecting
employees shall be in accordance with section 2940.14
B. For heavy construction equipment repair, 1595(a) requires
that repairs must not be made until workers are protected
from movement of the equipment or its parts.
C. An authorized person shall be responsible for the following
before working on de-energized electrical equipment or
systems unless the equipment is physically removed from the
wiring system: 2320.4
1. Notifying all involved personnel. 2320.4(a)(1)
2. Locking the disconnecting means in the “open” position
with the use of lockable devices, such as padlocks or
combination locks, or disconnecting the conductor(s) or
other positive methods or procedures that will eectively
prevent unexpected or inadvertent energizing of a
designated circuit, equipment, or appliance. 2320.4(a)(2)
Exception: Locking is not required under the following
conditions:
a. Where tagging procedures are used as specied in
2320.4(a)(3), and
b. Where the disconnecting means is accessible only to
personnel instructed in these tagging procedures.
3. Tagging the disconnecting means with suitable accident
prevention tags conforming to the provisions of 2320.6,
3314(e), and 2320.4(a)(3).
4. Eectively blocking the operation or dissipating the energy
of all stored energy devices that present a hazard, such
as capacitors or pneumatic, spring-loaded, and like
mechanisms. 2320.4(a)(4)
D. For more helpful information see:
1. The Lock-out/Block-out Methods and Sample Procedures
publication from Cal/OSHA at:
108 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Lock-out/Block-out Procedures | July 2022 109
English: www.dir.ca.gov/dosh/dosh_
publications/lockout.pdf
Spanish: www.dir.ca.gov/dosh/dosh_
publications/lockout_sp.pdf
Cal/OSHA’s Lockout/Tagout for Employers eTool at
www.dir.ca.gov/dosh/etools/08-003/index.htm
Machine Guarding
Machine guarding is required on all moving machine parts when
the operation of a machine or accidental contact with the parts
could injure the operator or other workers. The following are
some of the major moving machine parts that must be guarded:
• Gears, sprockets, and chain drives. 4075(a)
• Belt and pulley drives. 4070(a)
• Belt conveyor head and tail pulleys. 3999(b)
• Screw conveyors. 3999(a)
• Exposed shafts and shaft ends 4050(a), 4051(a)
• Collars and couplings. 4050(a)
• Hazardous revolving or reciprocating parts. 4002(a)
Multi-Employer Worksites
Multi-employer work sites are work locations where more
than one employer and their employees work, usually but not
necessarily at the same time. Most construction sites are multi-
employer work sites, and therefore more than one employer
is responsible for safety at these work sites. Each employer is
required to notify the other employers of hazards and to guard
against exposing their own employees as well as all other
employees on the site.
The four categories of employers who may be cited by Cal/OSHA
for employee exposures to violative conditions are identied in
336.10 and 336.11.
A. Exposing Employer is an employer whose employees were
exposed to the violative condition at the work site regardless
of whether that employer created the violative condition.
B. Creating Employer is an employer who actually created the
110 Cal/OSHA Pocket Guide for the Construction Industry | July 2022
violative condition.
C. Controlling Employer is an employer who is responsible, by
contract or through actual practice, for safety and health
conditions at the work site and who has the authority to
correct the violation.
D. Correcting Employer is an employer who has the
responsibility to correct the violative condition.
Personal Protective Equipment
When a hazard cannot be eliminated or controlled by
engineering or administrative controls as required by Cal/OSHA
regulations, workers must be protected by personal protective
equipment (PPE). Employers must ensure that all required
safety devices and safeguards, whether employer- or employee-
provided, comply with the applicable Cal/OSHA regulations
and are maintained in a safe, sanitary condition. Employers
must perform hazard assessments for all jobs and select the
proper PPE for those hazards. Employers also must ensure
that employees have an understanding of all of the PPE-related
information listed in 3380(f)(4). Workers must be protected by
PPE as follows:
A. Eye and face protection is required when there is an inherent
risk of eye injury from ying particles, injurious chemicals, or
harmful light rays. 3382
B. Foot protection is required for workers who are exposed
to foot injury from hot, corrosive, or injurious substances;
from falling objects; or from crushing or penetrating actions.
Foot protection is also required for employees who work in
abnormally wet locations. 3385
C. Hand protection is required for workers who are exposed to
skin absorption of harmful substances, cuts or lacerations,
abrasions, punctures, chemical burns, thermal burns,
radioactive materials, and harmful temperature extremes.
3384, 2320.2(a)
D. Body protection is required for workers who are exposed to
injurious materials. These workers must wear appropriate
body protection and clothing appropriate for their work.
1522(a)
1. Loose sleeves, ties, frills, lapels, cus, or other loose
clothing may not be worn around machinery in which it
could become entangled. 1522(b)
Personal Protective Equipment | July 2022 111
2. Workers must not wear clothing saturated or impregnated
with ammable liquids, corrosives, irritants, or oxidizing
agents. 1522(c)
E. Hearing protection (HP) is required because the noise
levels of many construction operations frequently exceed 90
dBA. When employees are subjected to sound levels listed
in Table 3 (5096(b)), feasible administrative or engineering
controls must be used. If these controls fail to reduce sound
levels to an acceptable range, workers must wear hearing
protection and be trained to properly use the HP devices.
Table 3 | Allowable Exposure Levels to Sound
Sound Level (dBA) Time Per Day (Hours)
90 8
95 4
100 2
105 1
110
F. Head protection requirements include the following:
1. Head protection is required for employees who are
exposed to ying or falling objects or to electric shocks and
burns. 3381(a)
2. When required, the employer shall provide each employee
with head protection that meets the requirements of
3381(b).
3. These employees must wear approved head protection.
Hair must be conned if there is a risk of injury from
entanglement in moving parts, combustibles, or toxic
contaminants. 3381(e)
4. Everyone at a construction site should wear hard hats with
bills in the forward position.
G. Respiratory protection is required when engineering or
administrative controls are not feasible or adequate for
limiting harmful exposure to airborne contaminants.
In these circumstances, exposed employees must
wear respirators approved by the National Institute for
Occupational Safety and Health (NIOSH). 5144(a)
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For all respirator use, a written respiratory protection program
must be in place, covering employee training, respirator
selection, medical evaluation, t testing, use, cleaning,
sanitizing, inspection, and maintenance. 5144(a), (c)
Notes: The following helpful resources are available from
Cal/OSHA:
The health and safety fact sheet “Respiratory Protection”
(www.dir.ca.gov/dosh/dosh_publications/respiratory-
protection-fs.pdf)
A guide titled “Respiratory Protection in the Workplace—A
Guide for Employers”
(www.dir.ca.gov/dosh/dosh_publications/respiratory.pdf)
H. Personal otation devices are required to be worn when
working over or near water. 1602
I. Some of the SOs require specialized personal protective
equipment not mentioned here. Employers and employees
should refer to the specic SOs applicable to the type of work
they perform to determine additional PPE requirements (for
example, the Electrical Safety Orders 2299 – 2874).
J. Work on exposed energized parts of equipment or systems
is allowed when suitable personal protective equipment and
safeguards (i.e., approved insulated gloves or insulated tools)
are provided and used, and other conditions as listed in
2320.2(a) are met. 2320.2.
Pile Driving
Regulations concerning pile driving are as follows:
A. A supervised danger zone must be established around the
operating hammer if employees are cutting, chipping, or
welding. 1600(a)
B. A blocking device or other eective means capable of safely
supporting the weight of the hammer shall be provided to
secure the hammer in the leads and shall be used at all times
when any employee is working under the hammer. 1600(b)
C. All pressurized lines and hoses must be secured by inch
alloy steel chain (3,250 lb. rated capacity) or wire rope of
equivalent strength. 1600(c)(1)
D. When used, work platforms must meet the specic
requirements of 1600(d).
Pile Driving | July 2022 113
E. Leads shall be provided with a continuous ladder or
horizontal bracing that is uniformly spaced at intervals no
greater than 18 inches, and the leads shall be equipped with
adequate anchorages for use with a personal fall protection
system. The operator of the equipment will apply all brakes
and necessary safety switches to prevent uncontrolled
motion of the equipment before an employee may access the
leads. 1600(f)
F. Fall protection must be provided when workers are exposed
to unguarded platforms or walkways exceeding 7 ft. in
height. 1670(a)
G. Walkways that are at least 20 inches wide must be provided
for access to all work areas. 1600(h)
H. Employees shall not ride the hammer, crane load block, or
overhaul ball. Sheet piling shall be rmly stabilized before
workers are permitted to work on them. 1600(g)
I. Where a drop hammer is used for driving piling, other than
sheet piling, a driving head or bonnet shall be provided to bell
the head of the pile and hold it true in the leads. 1600(h)(3)
The pile hammer, clamp, power unit, and supply hoses
shall be inspected in accordance with their manufacturer’s
recommendations. 1600(i)
J. Adequate and accessible otation gear (e.g., ring buoys, a
lifesaving boat) must be provided to protect workers who are
exposed to a drowning hazard. 1600(j), (k)
K. The engine or winch operator shall receive signals only from
a designated signaler. 1600(l)
Exception: When an employee is aloft in the leads, the
hammer shall not be moved except on the signal of the
employee aloft.
L. A hammer stop block is required. 1600(o)
M. Two steam (or compressed air) shuto valves are required;
one must be a quick-acting valve within reach of the hammer
operator. 1600(c)(2)
N. Rigs must be stabilized with guys or outriggers when needed.
Hammers shall be lowered to the bottom of the leads while
the pile driver is being moved (traveling). 1600(p)
O. Piles shall be unloaded and stored in a controlled manner.
1601
P. The rated capacity of the hammer’s suspension shall not
114 Cal/OSHA Pocket Guide for the Construction Industry | July 2022
be exceeded. The manufacturer’s recommendations for
extracting piling shall be observed at all times. 1600.1
Q. Barges or oats used in pile driving shall meet the
requirements of Article 13.
Pressurized Worksites
Pressurized worksites (also known as compressed-air worksites)
are sites where employees perform duties in a pressurized
environment, such as a caisson. Employees working on
pressurized worksites may be exposed to some specic health
and safety hazards due to compression and decompression.
These hazards are similar to hazards found in diving operations,
pressurized tunneling operations, and conned spaces.
Employees may develop decompression sickness (bends) from
exposure to decompression. The symptoms of decompression
sickness include headache, unusual tiredness, rash, pain in one
or more joints, tingling in the arms or legs, muscular weakness
or paralysis, breathing diculties, shock, unconsciousness, or
death.
Also, in a pressurized work environment, structural failures or
blowouts may occur. This may lead to the work area becoming
inundated with mud and water, causing drowning and asphyxia.
A. Cal/OSHA must receive written notication at least seven
days before the work is started. 6075
B. Regulatory requirements for pressurized (hyperbaric) work
environments include:
1. Following the guidelines for proper compression of
employees as per 6080(a).
2. Not subjecting employees to pressure exceeding 50
pounds per square inch. 6080(b)
3. Not allowing employees working in compressed air to pass
from the working chamber to atmospheric pressure until
after decompression, in accordance with 6085, 6090.
Exception: The requirements above do not apply in an
emergency. 6080
4. Controlling decompression of employees as discussed
in 6085.
5. Decompression of employees in accordance with the
specied decompression tables of the U.S. Navy Diving
Pressurized Worksites | July 2022 115
Manual, Volume 2, Chapter 9, 2008. 6085
Exception: Requirements #4 and #5 do not apply in an
emergency provided that employees are decompressed in
accordance with decompression tables and procedures
recommended by the supervising physician.
6. Temperature, illumination, sanitation, and ventilation as
per 6100. Ventilation in the locks and chambers, with
the exception of the medical chamber, shall be such that
the air quality meets the requirement of section 5144(i).
Ventilating air shall be not less than 30 cubic ft. per minute
per person. 6100
7. Providing forced ventilation during decompression to
ensure a source of fresh air. 6100(f)
8. Taking one or both of the following steps when an oxygen
breathing gas system is used during decompression,
to ensure that the concentration of oxygen inside the
chamber or lock does not exceed 25 percent (25%) by
volume: 6100(i)
a. The oxygen breathing gas system shall capture the
oxygen that is not consumed by the user and directly
exhaust it to a well-ventilated area outside of the lock
or chamber.
b. An oxygen meter shall be used to continuously monitor
the oxygen concentration inside the chamber or lock.
9. Retaining a supervising physician who shall be available
at all times while pressurized work is in progress in order
to provide medical supervision of employees employed in
compressed air work. 6120
10. Following re prevention and oxygen safety requirements
as specied in 6115.
C. Employees who are exposed to or control the exposure
of others to hyperbaric conditions shall be trained in
hyperbaric related physics and physiology, recognition of
pressure related injuries, and how to avoid discomfort during
compression. 6075
Qualied Person
A qualied person is a person designated by the employer,
and who by reason of training, experience, or instruction has
demonstrated the ability to perform safely all assigned duties;
116 Cal/OSHA Pocket Guide for the Construction Industry | July 2022
and, when required, is properly licensed in accordance with
federal, state, or local laws and regulations. 1504 The CSOs
refer to a Qualied Person in several of the regulations.
Ramps and Runways
Regulations concerning ramps and runways are as follows:
A. General requirements
1. Ramps must be properly designed to provide a safe
means of access for foot or vehicle trac. 1623, 1624,
1625
2. Open sides of ramps that are 7
ft. or more above
ground must have standard guardrails. 1621(a)
B. Foot ramps
1. Foot ramps must be at least 20 inches wide and must be
secured and supported to avoid deection or springing
action. 1624(a)
2. If the ramp slope exceeds 2 ft. of rise for every 10 ft. of
run, cleats must be 8 inches or more in length and must be
placed not more than 16 inches apart. 1624
C. Wheelbarrow ramps and runways
1. Wheelbarrow ramps and runways must be rmly secured
against displacement. 1624(c)
2. Ramps more than 3 ft. high must be 30 inches wide, and
planks must be rmly cleated together. 1623
3. Falsework design loads must be increased by 10 psf for
worker-propelled carts. 1717(a)
Roong Operations
Working conditions at roong projects are often dicult and
continuously expose workers to serious hazards. In California,
one of the most common causes of work-related deaths is falls
from roofs. Injuries common to the roong industry include (1)
broken bones because of falls; (2) back injuries because of
awkward postures and heavy lifting; and (3) burns from contact
with hot roong asphalt and associated equipment.
Roong operations are classied as either single-unit or multi-
unit. Examples of single-unit (monolithic) roong are built-up
Ramps and Runways | July 2022 117
roong, at-seam metal roong, and vinyl roong. Examples of
multi-unit roong are asphalt shingles, cement, clay and slate
tile, standing seam metal panels, shingle metal roong, and
wood shingles.
Employees shall be protected from falls from roofs. The following
regulations aim to minimize or eliminate the hazards associated
with the roong industry:
A. Specic fall protection methods are used for: 1730
• Dierent roof heights and slope conditions
• Dierent types of roong operations including custom- built
homes
• Re-roong operations
• Roong replacements or additions on existing residential
dwelling units
• Roong operations (including new production-type
residential construction) with slopes less than 3:12
1. For single-unit roofs with slopes of 0:12 through 4:12 and
more than 20 ft. in height. 1730(b)
a. Warning lines and headers 1730(b)
b. Personal fall protection systems as per 1724(f)
c. Catch platforms with guardrails 1724(c)
d. Scaold platforms 1724(d)
e. Eave barriers 1724(e)
f. Parapets that are 24 inches or higher 1730(b)
g. Standard railings and toeboards. Article 16
Exceptions: 1730(b)
»Whenever any equipment is pulled by an operator who
walks backwards, one or a combination of the above
methods shall be applied regardless of height.
»At those job sites where any equipment is pulled by
an operator who walks backwards or an operator
rides motorized equipment, the parapet must be 36
inches or more in height at those roof edges which are
perpendicular (or nearly so) to the direction in which the
equipment is moving.
2. For single-unit roofs with slopes exceeding 4:12 and more
than 20 ft. in height: 1730(c)
118 Cal/OSHA Pocket Guide for the Construction Industry | July 2022
a. Parapets that are 24 inches or higher 1730(c)
b. Personal fall protection systems as per 1724(f)
c. Catch platforms 1724(c)
d. Scaold platforms 1724(d)
e. Eave barriers 1724(e)
f. Standard railings and toeboards. Article 16
Exception:
Provisions in 1730(c) do not apply at job sites where the
motorized equipment on which the operator rides:
»Has been designed for use on roofs having slopes
greater than 4:12 and
»Is used where a parapet is:
i. At least 36 inches high at roof edges and
ii. Perpendicular to the direction in which the
equipment is moving
3. For single-unit roofs with slopes exceeding 4:12,
no equipment that is pulled by an operator walking
backwards shall be used.
4. For multi-unit roofs with slopes 0:12 through 5:12 and
more than 20 ft. in height, employees shall be protected
from falls by the use of one of the following: 1730(c)
a. A roof jack system as provided in section 1724(a)
b. A minimum of 24-inch-high parapet
c. Other methods aording equivalent protection
5. For multi-unit roofs with slopes exceeding 5:12 and more
than 20 ft. in height, employees shall be protected from
falls by the use of one or a combination of the following:
1730(f)
a. Parapets that are at least 24 inches high
b. Personal fall protection systems as per 1724(f)
c. Catch platforms 1724(c)
d. Scaold platforms 1724(d)
e. Eave barriers 1724(e)
f. Roof jack systems (safety lines are required when using
roof jack systems on roofs steeper than 7:12) 1724(a)
Roong Operations | July 2022 119
B. New production-type residential construction with roof slopes
of 3:12 or greater have specic fall protection requirements.
1731
1. For New Production-Type Residential Construction with
slopes 3:12 through 7:12 and the eave height exceeds
15 ft. above the grade or level below, employees shall be
protected from falling when on a roof surface by use of one
or any combination of the following methods:
a. Personal Fall Protection 1670
b. Catch Platforms 1724(c)
c. Scaold Platforms 1724(d)
d. Eave Barriers 1724(e)
e. Standard Railings and Toeboards. Article 16
f. Roof Jack Systems 1724(a)
2. For New Production-Type Residential Construction with
slopes greater than 7:12 regardless of height, employees
shall be protected from falling by methods prescribed in
the above subsections a, b, c, and e. 1731(c)
C. Roong operations require documented employee training.
For New Production-Type Residential Construction, training
shall include the following in addition to those required by
1509 and 3203:
1. Work on or near gable ends
2. Slipping hazards
3. Roof holes and openings
4. Skylights
5. Work on ladders and scaolds
6. Access to the roof
7. Placement and location of materials on the roof
8. Impalement hazards
9. Care and use of fall protection systems
D. Hot operations are subject to the following regulations:
1. Workers must not carry buckets containing hot material up
ladders. 1725(a)
2. An attendant must be stationed within 100 ft. of any kettle
not equipped with a thermostat. 1725(d)
3. Liqueed petroleum gas cylinders must not be located
where the burner will increase the temperature of the
cylinder. 1725(g)
4. A Class BC re extinguisher shall be kept near each kettle
in use, as shown below:
a. For a kettle with a capacity of less than 150 gal. = 8:BC
b. For a kettle with a capacity of 150 gal. to 350 gal. =
16:BC
c. For a kettle with a capacity of more than 350 gal. =
20:BC 1726(d)
5. The fuel tanks of compressed-air-fueled kettles must
be equipped with a relief valve set for a pressure not to
exceed 60 psi. 1726(c)
6. Coal tar pitch operations are subject to the following
requirements:
a. Workers must use skin protection. 1728(a)
b. Washing or cleansing facilities must be available.
1728(c)
c. Workers must use respirators and eye protection in
conned spaces that are not adequately ventilated.
1728(b), 5158
7. Hot pitch and asphalt buckets have the following
maximum capacities:
a. Carry buckets = 6 gal.
b. Mop buckets = 9 gal. 1729(a) (2), (4)
E. Personal fall protection for roong operations is regulated as
follows: 1724(f)
1. Personal fall arrest systems, personal fall restraint
systems, and positioning devices must be installed and
used in accordance with Article 24 in the GISO. 1724(f)
2. Safety lines must be securely attached to substantial
anchorages on the roof. 1724(f)
3. Roof openings must be railed or covered. Temporary
railing and toeboards shall meet the requirements of
sections 1620 and 1621. The railing shall be provided
on all exposed sides, except at entrances to stairways.
1632(b)(2)
4. The cover must be securely fastened and able to
120 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Roong Operations | July 2022 121
withstand 2 times the expected load or a minimum of 400
lbs. Covers must bear a sign stating OPENING—DO NOT
REMOVE. 1632(b)(3)
5. An employee approaching within 6 ft. of any nished
skylight or skylight opening must be protected from falling
through the skylight or opening as specied in 3212(e).
Scaolds
Work activities associated with scaolds are subject to many
hazards; however, falls are by far the number-one cause of
injury or death among construction workers. The following
requirements regulate the design, erection, use, and dismantling
of scaolds:
A. General requirements
1. Scaolds must be provided for work that cannot be done
safely by employees standing on ladders or on solid
construction that is at least 20 inches wide.
Exception: A 12-inch-wide plank on members that are on
24-inch (or closer) centers is permitted. 1637(a)
2. The design and construction of scaolds must conform
to applicable standards and requirements 1637, ANSI
A10.8-1988, ANSI/ASSE A10.8-2001. Standards are
based on stress grade lumber. Metal or aluminum may
be substituted if the structural integrity of the scaold is
maintained. 1637(b)
3. Manufactured scaolds shall be used in accordance with
the manufacturer’s recommendations. 1637(b)(4)
Exception: Where specic requirements that address
riding on a rolling scaold in section 1646(i) and (j) may
conict with the manufacturer’s recommendations, the
provisions in section 1646(i) and (j) take precedence.
4. Each scaold must be designed to support its own weight
and 4 times the maximum load. Maximum working loads
are as follows:1637(b)
a. Light-duty scaolds: 25 psf of work platform.
b. Medium-duty scaolds: 50 psf of work platform.
c. Heavy-duty scaolds: 75 psf of work platform.
d. Special-duty scaolds: exceeding 75 psf as determined
by a qualied person or a California registered Civil
122 Cal/OSHA Pocket Guide for the Construction Industry | July 2022
Engineer with scaold design experience.
e. Engineered scaolds: as determined by a California
registered Civil Engineer with scaold design
experience.
5. The erecting and dismantling of scaolds are regulated as
follows:
a. Scaold erection and dismantlement must be
supervised by a qualied person. 1637(k)(1)
b. Scaolds must be erected and dismantled according
to design standards, engineered specications, or
manufacturer’s instructions. 3328, and 1637(k)
c. A DOSH permit is required for erecting and dismantling
scaolds that exceed 3 stories or 36 ft. in height.
341(d)(5)(B)
6. Scaold access: Ladders, horizontal members, and
stairways must provide safe and unobstructed access to
all platforms. The equipment must be located so that its
use will not disturb the stability of the scaold: 1637(n)
a. Ladders may be used, as follows:
(1) Portable ladders shall comply with T8 CCR 3276.
1675(b)
(2) Fixed ladders shall comply with T8 CCR 3277.
1675(c)
(3) Ladders must be securely attached to scaolds.
1637(n)
(4) Ladders must extend 3 ft. above the platform, or
handholds must be provided. 3276(e)(11)
b. Manufactured hook-on and attachable ladders shall be
securely attached to the scaold and: 1637(n)
(1) Shall be specically designed for the type of
scaold used;
(2) Shall have a minimum rung length of 11 in.
(29 cm);
(3) Shall have uniformly spaced rungs with a
maximum spacing between rungs of 16 in;
(4) Shall be positioned so that their bottom rung
is not more than 24 inches (61 cm) above the
scaold supporting level; and
Scaolds | July 2022 123
(5) When hook-on and attachable ladders are used
on a supported scaold more than 35 feet
(10.7 m) high, they shall have rest platforms at
35-foot maximum vertical intervals.
c. Horizontal members built into the end frame of a
scaold may be used to access platforms if: 1637(n)
(1) The horizontal members are parallel and level.
(2) The horizontal members make a continuous
ladder, bottom to top, with the ladder sides of the
frames in a vertical line.
(3) The horizontal members provide sucient
clearance for a good handhold and foot space.
1637(n), 1644(a)
d. Stairways must conform to the following: 1637(n)(2)
(1) Permanent stairways for scaolds must comply
with GISO requirements (i.e., 3214, and 3622).
(2) Prefabricated scaold steps or stairs must comply
with:
• ANSI 10.8-1988 or ANSI/ASSE 10.8-2001 if
manufactured on or before May 28, 2005
• ANSI/ASSE 10.8-2001 if manufactured after
May 28, 2005
7. Scaolds must be secured as follows:
a. Scaolds must be tied o with a double-looped No.
12 iron wire or a single-looped No. 10 iron wire or the
equivalent. A compression member should prevent
scaold movement toward the structure. 1640, 1641,
and 1644
b. Light duty wooden pole scaolds must be tied o every
20 ft. horizontally and vertically. 1640(b)
c. Heavy-trade wooden pole scaolds must be tied o
every 15 ft. horizontally and vertically. 1641(f)
d. Metal scaolds must be tied o as specied in
1644(a)(5).
8. Scaold platforms must conform to the following:
a. Platforms must be capable of supporting the intended
load. 1644(a)(1), and 1637(m)
b. Platforms must be planked solid (without gaps) and
124 Cal/OSHA Pocket Guide for the Construction Industry | July 2022
cover the entire space between scaold uprights.
1640(b), 1641(g), 1644(a), and 1646(e)
Exception: In solid planking the following gaps are
permissible:
(1) The opening under the back railing
• Wood scaolds: 8-inch (max) horizontal.
1640(b)(5)
• Metal scaolds: 10-inch (max) horizontal.
1644(a)(7)
(2) Space between the building (structure) and the
platform
• Wood scaolds: 14-inch (max). 1640(b)(5)
• Metal scaolds: 16-inch (max). 1644(a)(7)
• Bricklayers’ scaolds: 7-inch (max) to nished
face of building. 1641(g)(2)
c. Platform minimum widths are as follows:
(1) Light duty: 20-inch 1640(b)(5)
(2) Heavy trades: 4 ft. 1641(c)
d. Platform slope must not exceed 2 ft. vertically to 10 ft.
horizontally. 1637(o)
e. Overhead protection is required when people are
working overhead. 1637(q)
f. Slippery platform conditions are prohibited. 1637(p)
g. All scaold platforms shall meet the planking
requirements of section 1637. 3622(f)(5)
9. Planking must conform as follows:
a. All solid sawn planking, unless specied in other orders,
must be made of scaold grade (structural plank 2200
psi) lumber (see 1504) with a nominal dimension of at
least 2” x 10”. 1637(f)(1)
Prior to being placed into service, all solid sawn wood
scaold planks shall be certied by, or bear the grade
stamp of, a grading agency approved by the American
Lumber Standards Committee. 1637(f)(5)
b. All Douglas Fir and Southern Pine planking sized
2 x 10 inch (nominal) or 2 x 9 inch (rough) shall not
exceed a maximum span as follows: 1637(f)(2)
Scaolds | July 2022 125
(1) Light trades @ 25 psf = 10 ft.
(2) Medium trades @ 50 psf = 8 ft.
(3) Heavy trades @ 75 psf = 7 ft.
c. The maximum permissible spans allowed for other
wood species of scaold planking shall not exceed 10
ft. and shall be determined by a licensed professional
engineer. 1637(f)(3)
(1) All manufactured scaold planking, including
engineered wood products, laminated veneer
lumber, metal, composite, and plastic planks
shall be capable of supporting, without failure, its
own weight and 4 times the maximum intended
working load.
(2) Prior to being placed in service, all laminated
veneer lumber scaold planks manufactured
after December 2, 2010, shall be labeled with the
seal of an independent, nationally recognized,
inspection agency approved by the International
Accreditation Services (IAS) certifying
compliance with ASTM D 5456-09a and ANSI/
ASSE A10.8-2001, section 5.2.10.
(3) Planks with spans in excess of 10 ft. shall be
labeled to indicate the maximum intended working
load.
(4) Planks shall be used in accordance with the
manufacturer’s specications.
d. All scaold planks shall be visually inspected for defects
before use each day. 1637(f)(6)
e. Defective or damaged scaold planks shall not be used
and shall be removed from service. 1637(f)(7)
f. Planking shall overhang the ledger or support as follows:
(1) A minimum of 6 inches 1640(b), 1645(b)
(2) A maximum of 18 inches 1637(g), 1645(b)
g. A single plank (up to 4 ft. high) is only permitted on
light-trade wooden pole and horse scaolds.
1640(b)(5)(A), 1647(e)(2)
h. All platform planks shall not deect more than
of the span when loaded to the manufacturer’s
recommended maximum load. 1637(w)
126 Cal/OSHA Pocket Guide for the Construction Industry | July 2022
10. Guardrails must be installed on open sides and ends of
platforms that are 7 ft. or higher. 1621(a)
Exception: 1644(a)(6)(A), (B)
• X braces that substitute for a mid-rail must intersect
20 inches to 30 inches above the platform.
• X-braces that substitute for a top rail must intersect 42
inches to 48 inches above the platform, and a mid-rail
must be placed at 19 inches to 25 inches above the
platform.
11. Toeboards are required on all railed sides of work surfaces
where employees work or pass below. 1621(b)
12. Height limits for scaolding are as follows:
a. Wood (frame/post) = 60 ft. 1643
b. Tube and coupler = 125 ft. 1644(b)(4)
c. Tubular (welded) = 125 ft. 1644(c)(7)
Exception: The above limits do not apply when the
scaolding is designed by a civil engineer registered in
California.
d. Horse (single) = 10 ft. 1647(b)(2)
e. Horse (tiered) = 10 ft. 1647(b)(2)
13. Prohibited scaolds and supports: 1637(j)
a. Shore scaolds
b. Jack scaolds (with brackets attached to single studs)
c. Lean-to scaolds
d. Stilts
e. Nailed brackets
f. Brick or blocks
g. Loose tile
h. Unstable objects
14. Maximum scaold working load must be posted or
provided to and available from the job site supervisor.
1637(b)(6)
15. Prohibited work practices:
a. Work on or from scaolds during storms or high winds
unless: 1637(u)
Scaolds | July 2022 127
(1) A qualied person has determined that it is safe
and
(2) Employees are protected by a personal fall arrest
system or wind screens.
Note: Wind screens shall not be used unless the
scaold is secured against the anticipated wind forces.
1637(u)
b. Wood platforms shall not be painted with opaque
nishes but can be coated with certain clear nishes.
1637(v)
B. Scaold-specic requirements
After reviewing the general requirements for scaolds, refer
to the regulations listed below (and any other applicable
SOs) for the specic type(s) of scaold in use to determine
whether these requirements replace or augment the general
requirements.
The requirements listed below are unique to each specic
type of scaold listed:
1. Tubular welded scaold systems 1644
These scaold systems are commercially fabricated and
must meet the following requirements:
a. Frames must nest with coupling or stacking pins to
provide proper vertical alignment. 1644(c)(5)
b. Frame panels must be vertically pinned if uplift may
occur. 1644(c)(6)
2. Tower and rolling scaolds 1646
The specications for tower and rolling scaolds are as
follows:
a. The “height-to-base” must not exceed 3:1 unless the
scaold is secured. 1646(a)
b. A screw jack must extend of its length into the leg
tube and the exposed thread must not exceed 12
inches. 1646(b)(2)
c. Two wheels or casters must swivel; all four must lock.
1646(c)
d. A fully planked platform is required. 1646(e)
e. All frame and center joints shall be locked together by
lock pins, bolts, or equivalent fastenings. 1646(d)
128 Cal/OSHA Pocket Guide for the Construction Industry | July 2022
f. The scaold must have horizontal diagonal bracing (see
Illustration 9). 1646(b)
g. Railings are required if the platform is 7 ft. or more
above grade. 1646(b)
h. Ladders or other unstable objects shall not be placed on
top of rolling scaolds to gain greater height. 1646(f)
i. When scaolds are built on motor trucks or vehicles,
they must be rigidly attached to the truck or vehicle.
1646(g)
j. Trucks or vehicles that have scaolds attached to them
shall have a device in use whenever employees are
on the scaold that prevents swaying or listing of the
platforms. 1646(h)
k. Employees may ride on a rolling scaold moved by
others below if the following conditions exist: 1646(i)
(1) The oor or surface is within 3 degrees of level,
and free from pits, holes, or obstructions.
(2) The minimum dimension of the scaold base,
when ready for rolling, is at least of the height.
Outriggers, if used, shall be installed on both
sides of staging.
(3) The wheels are equipped with rubber or similar
resilient tires. For towers 50 ft. or over, metal
wheels may be used.
(4) The manual force used to move the scaold shall
be applied as close to the base as practicable,
but not more than 5 ft. (1.5 meters) above the
supporting surface of the scaold.
(5) Before a scaold is moved, each employee on the
scaold shall be made aware of the move.
(6) No employee shall be on any part of the scaold
that extends outward beyond the wheels, casters,
or other supports.
l. Employees may ride and move on a Self-Propelled
rolling scaold while on the platform without assistance
from others below, provided the following conditions are
met: 1646(j)
(1) All of the provisions in 1646(i) shall be met, except
that the scaold need not be moved by others
below.
Scaolds | July 2022 129
(2) The scaold platform shall not be more than 4 ft.
above the oor level.
(3) The working platform shall be no less than 20
inches in width with a maximum 1-inch space
between platform planks.
(4) Wheels or casters of rolling scaolds shall be
provided with an eective locking device that
is used in accordance with 1646(c); or rolling
scaolds shall be provided with an eective
device that is used to prevent movement of the
scaold when workers are climbing or working on
the scaold.
(5) The use of power systems such as motor
vehicles, add-on motors, or battery-powered
equipment to propel a rolling scaold is
prohibited.
m.Employees who ride on rolling scaolds and employees
who assist in moving employees riding on a rolling
scaold shall be trained on the hazards associated with
riding on a rolling scaold as per 1646 and 1509.
130 Cal/OSHA Pocket Guide for the Construction Industry | July 2022
Illustration 9 | Tower and Rolling Scaold
Guardrails
Working platform
Guardrail
support
Toeboard
Access
ladder
Locking
pins
Crossbracing
Locking
casters
3. Suspended Scaolds 1658
a. General requirements for suspended scaolds (swing
staging). 1658
Most suspended scaolding has a two-point
suspension supported by hangers or stirrups. The
following applies:
(1) Each wire is suspended from a separate outrigger
beam or thrustout. 1658(k)
(2) Multi-stage units or units with overhead protection
must be equipped with additional suspension
lines to support the scaolding in case the primary
suspension system fails. 1658(u)
(3) The scaold must be inspected daily by a
qualied person and tested frequently. 1658(g)
Scaolds | July 2022 131
Horizontal
diagonal brace
(4) When a suspended scaold is left unattended in
an elevated position, it shall be securely lashed to
the building and be cleared of all tools, buckets, or
other moveable materials. 1658(p)
(5) All hoisting mechanisms and metal platforms must
meet nationally recognized standards. 1658(a)
(6) Outrigger beams must be secured in a saddle
and anchored at one end to a solid structure. The
inboard end must be tied back. 1658(j)
(7) The beam must be capable of supporting four
times the intended load. 1658(j)(1)
(8) Use of a ladder as a platform is prohibited even if
a horizontal work surface is added over the rungs.
1658(d)
(9) The load limit is one person per suspension rope.
1660(a)
(10) An insulated wire suspension rope is required
when workers are welding, burning, sandblasting,
or using any chemical substance that may
damage the rope. 1658(f)
(11) A separate safety harness and lifeline are required
for each worker. 1658(i), 1660(g)
(12) Platform dimensions must be as follows:
• Width = 14 in. to 36 in. 1660(d);
= 24 in. to 36 in. if the platform is used by
cement masons. 1661(b)
• Span = 10 ft. (2” x 10” planks). 1660(e);
= 12 ft. (2” x 12” planks). 1660(e)
• Bolster (ledger) = 2” x 4” cross section.
1660(c)
b. Specic requirements for suspended scaolds:
(1) Powered suspended scaolds 1667
The general rules for swing scaolds apply except
as listed below:
• The minimum platform width must be 20 inches
1667(d)
• Railings are required on open sides and ends,
and on all sides if the scaold is suspended by
one rope. 1667(a)
132 Cal/OSHA Pocket Guide for the Construction Industry | July 2022
• The load limit is 425 lbs. for a ladder-type
platform. 1667(b)
• Controls must be of the dead-man type.
• Load release units for fast descent are
prohibited. 1667(f)(1)
(2) Interior hung suspended scaolds 1665
These scaolds are of a wood or steel-tube-
and-coupler type, and they are suspended from
a ceiling or roof structure. The general and
suspended scaold rules apply.
Exception:
• Suspension ropes must be wrapped twice
around supporting members and ledgers.
1665(b)
• Ends of wire rope must be secured with at least
three clips.
(3) Float suspended scaolds. 1663
These scaolds are intended for such work as
welding, riveting, and bolting. 1663(a)
• Platform size: 3 ft. x 6 ft. x -inch plywood.
1663(a)(1)
• Rope: 1-inch diameter manila (min.). 1663(a)(4)
• Load limit: Three people 1663(a)
• Personal fall protection and a separate lifeline:
Required for each person. 1663(a)(5)
(4) Boatswain’s chair. 1662
The use of a boatswain’s chair requires training or
experience. 1662(a)
• Platform size: 10 in. x 24 in. x 2 in. 1662(i)
• Rope: -inch diameter manila (min.) and
-inch diameter protected wire for welding.
1662(j), (k)
• Personal fall protection and a separate lifeline:
Required 1662(c)
• Area below: Barricaded. 1662(b)
(5) Needle-beam scaolds. 1664
Scaolds | July 2022 133
The specications for needle-beam scaolds are
as follows:
• Beam size: 4 in. x 6 in. x 10 ft. 1664(a)(1)
• Rope: 1
-inch diameter manila. 1664(a)(4)
• Personal fall protection: Required in
accordance with Article 24 in the CSOs.
1664(a)(12)
Note: See the hitches for holding needle beams in
Illustration 10.
(6) Outrigger scaolds. 1645
Outrigger scaolds are regulated as follows:
• Brackets or beams must be anchored or
braced against turning, twisting, or tipping.
1645(a)(1)
• Platform: at least two 2-inch x 10-inch planks.
1645(a)(2), 1645(b)(5)
• Beam size: 3 inches x 12 inches (min.)
1645(a)(2)
• Beam length: Outboard of fulcrum must not
exceed 6 ft; inboard must be 1 times the
outboard section. 1645(a)(1)
Note: For multi-level structures, the units must be
designed by a California registered Civil Engineer.
1645(a)(3)
134 Cal/OSHA Pocket Guide for the Construction Industry | July 2022
Illustration 10 | Hitches for Holding Needle
Beams
Square knot
Bowline
Rolling or
taut-line hitch
Scaffold hitch Clove hitch Round turn and
two half-hitches
Eye splice Running bowline Round turn and
two half-hitches
(7) Bracket scaolds (light trades). 1645
Brackets must be bolted through walls, welded to
tanks, properly secured to metal studs, or hooked
over a supporting member. 1645(d)
• Platform: 20 inches x 10 ft. (min.)
• Load limit: Carpenter’s type = two workers and
75 lbs. of equipment. 1645(e)(4)
Scaolds | July 2022 135
(8) Horse scaolds. 1647
The specications for horse scaolds are as
follows:
• Platform width:
i. Light trades = 20 inches (min.); 10 inches if
the platform is less than 4 ft. high.
ii. Heavy trades = 4 ft. (min.). 1647(e)(2)
iii. Width of base legs = x height (min.).
1647(a)(3)
• Height:
i. Collapsible horse = 6 ft. (max.). 1647(d)(2)
ii. Single horse = 10 ft. (max.). 1647(e)(1)
iii. Two tiers (max.) = 10 ft. (max.). 1647(e)(1)
(9) Ladder jack scaolds. 1648
The specications for ladder jack scaold
platforms are as follows:
• Span = 16 ft. (max.) 1648(b)
• Height = 16 ft. (max.) 1648(a)
• Width = 14 in. (min.) 1648(b)
• Load = two workers (max.) 1648(a)
Notes:
»Ladders must be Type I, IA, or IAA duty rated
ladders in accordance with 3276(c). Job-built
ladders shall not be used for this purpose.
1648(d)
» A safety line is required for each worker. 1648(c)
(10) Window jack scaolds. 1654
The specications for window jack scaolds are
as follows:
• Only one window per scaold is permitted.
1654(d)
• The load limit is one person per scaold.
1654(d)
• Fall protection or railings are required. 1654(c)
136 Cal/OSHA Pocket Guide for the Construction Industry | July 2022
Silica Dust
Construction work that involves exposure to crystalline silica-
containing materials can cause lung diseases. These silica-
containing materials include (but are not limited to):
• Sand
• Rock
• Ceramic and terracotta tiles
• Concrete and concrete block
• Manufactured stone
• Roof tiles
• Bricks and blocks
• Grouts and mortar
• Some joint compounds
• Abrasive materials
Exposure to crystalline silica can cause a variety of lung
diseases, including silicosis, lung cancer, COPD (chronic
obstructive pulmonary disease), decreased lung function,
increased likelihood of getting tuberculosis, and immune system
and kidney eects. Although most cases of silicosis develop after
years of exposure, instances of extremely high exposure have
resulted in illness and even death in a matter of weeks.
The 8-hour permissible exposure limit (PEL) for airborne
crystalline silica is established at 0.05 mg/m
3
with an Action Level
of 0.025 mg/m
3
(see Table AC-1 of 5155 and section 1532.3).
Hazardous work activities include abrasive blasting with sand
and loading, dumping, chipping, hammering, cutting, and drilling
of rock, sand, or concrete. Generally, during work on materials,
such as rock or concrete that contain a signicant amount of
silica, continuous exposure to a visible cloud of dust will probably
result in levels of exposure that exceed the PELs. However, in
some cases the PELs can be exceeded even when there is no
visible cloud of dust.
For additional information on the hazards and control of silica
exposures see the:
Hazards of Silica in Construction eTool (www.dir.ca.gov/
dosh/etools/08-019/index.htm)
Respirable Crystalline Silica Standards Update and FAQ
(www.dir.ca.gov/dosh/respiratory-silica-F AQ.html).
Silica Dust | July 2022 137
138 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Temporary Agencies | July 2022 139
Before beginning work that could expose employees to
crystalline silica, employers must comply with the following
requirements:
A. Know and understand T8 CCR sections 1532.3 and 1530.1.
Section 1530.1 contains certain requirements not found in
1532.3, such as:
1. Procedures to ensure that dust reduction systems
maintain their eectiveness.
2. Additional training topics for employees and supervisors.
B. Methods of exposure control or compliance.
1532.3(c) or (d)(3)
C. Exposure assessments. 1532.3(d)(2)
D. Respiratory protection. 1532.3(e)
E. Housekeeping. 1532.3(f)
F. Restricted areas. 1532.3(g)(1)(D)
G. Written exposure control plan. 1532.3(g)
H. Medical surveillance. 1532.3(h)
I. Communication of respirable crystalline silica hazards to
employees. 1532.3(i)
J. Recordkeeping. 1532.3(j)
Stairways
Stairways are an acceptable method for gaining access to oors
and working levels of buildings and scaolds.
In addition to the stairways required, buildings 60 ft. or more in
height or 48 ft. below ground level require an elevator. 1630(a)
Stairways must be installed as follows:
A. In buildings of up to three stories or 36 ft. in height, at least
one stairway is required. 1629(a)(4)
B. In buildings of more than three stories or 36 ft. in height, two
or more stairways are required. 1629(a)(4)
C. A stairway to a second or higher oor must be installed
before studs are raised to support the next higher oor.
1629(b)(1)(A)
D. In steel frame buildings, a stairway must be installed leading
up to each planked oor. 1629(b)(2)
E. In concrete buildings, a stairway must be installed to the oor
that supports the vertical shoring system. 1629(b)(3)
F. Stairways shall be at least 24 inches in width and shall be
equipped with stair rails, handrails, treads, and landings.
G. All guardrails, including their connections and anchorage,
shall be capable of withstanding a load as specied in
1620(c).
H. Handrails must be 34 inches to 38 inches above the tread
nosing. 1626(c)(6)
I. Wooden posts shall be not less than 2-inch by 4-inch in
cross section, spaced at 8 ft. or closer intervals. Wooden
top railings shall be smooth and of 2-inch by 4-inch or larger
material. Double 1-inch by 4-inch members may be used as
top railings when certain conditions are met. 1620(b)(2), (3)
J. Railings and toeboards must be installed around stairwells.
1626(a)(2)
K. The stairway shall have landings at each oor or level of not
less than 30 inches in the direction of travel and extend at
least 24 inches in width at every 12 ft. or less of vertical rise.
1626(a)(2)
L. Stair steps must be illuminated with at least 5 foot-candles of
light and all lamps must be guarded. 1629(a)(7)
Temporary Agencies
A. Host employers have the primary responsibility for
maintaining safe worksites. Temporary (temp) agencies are
responsible for:
1. Determining the conditions at the worksite.
2. Providing basic safety information to temp employees.
3. Informing the temp employees how to get specic
information on protection from hazards at the host site.
B. To ensure a clear understanding of each employer’s role,
Cal/OSHA recommends temp agency and host employer to
establish responsibilities in their contract.
C. In general, temp agencies are responsible for ensuring that
employees have received proper training. Host employer is
responsible for the site-specic trainings appropriate to the
employees’ particular task.
140 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Toilets/Washing Facilities/ Sanitation | July 2022 141
D. Both the temp agencies and the host employer need to follow
all relevant California labor laws and T8 CCR as they relate
to the health and safety of their employees. Requirements
include:
1. Have a written, eective, and fully implemented IIPP. 3203
2. In a dual-employer worksite, where an employee has
two employers at the same time, contact Cal/OSHA for
regulatory requirements.
3. In a multi-employer worksite, where two or more
employers have their employees working, employers need
to follow requirements as per T8CCR sections 336.10 and
336.11.
E. Injury and illness records should be kept by:
1. Where temp agency exercises day-to-day supervision, the
temp agency keeps the records.
2. Where temp agency and host employer share the
supervision, the two employers reach an agreement on
who keeps the records.
3. Where the host employer exercises supervision, the host
employer keeps the records.
Note: Only one employer’s log should contain a record of
injuries and illnesses of the employees.
F. Temp agencies need to keep in touch with their employees
and monitor their safety and health at work on a regular
basis.
Toeboards
Regulations concerning toeboards include the following:
A. Toeboards must be provided on all open sides and ends of
railed scaolds at locations where persons are required to
work or to pass under the scaold and at all interior oor,
roof, and shaft openings. 1621(b)
B. Specications for toeboards are as follows:
1. A toeboard must be securely fastened at a minimum of 4
inches (nominal) in height from its top edge to the level of
the oor, platform, runway, or ramp. A toeboard must have
not more than a 1/4 in. clearance above the oor level. It
may be made of any substantial material, either solid or
with openings not more than 1 inch in greatest dimension.
1621(b)
2. Where material is piled to such a height that a standard
toeboard does not provide protection, paneling or
screening from oor to intermediate rail or top rail shall be
provided. 1621(c)
Toilets/Washing Facilities/
Sanitation
Regulations concerning toilets, hand washing, and sanitation
include the following:
A. Toilet facilities are required at the job site. 1526(b)
B. A toilet is required for each 20 employees or fraction thereof
of each sex; urinals may be substituted for half of the units.
1526(a)
Exceptions:
»Sites with fewer than five employees are only required
to provide one single-user toilet (a toilet facility that is
lockable from the inside with one toilet, or one toilet and
one urinal) designated for all-gender use. 1526(a)(1)
»Sites may use single-user toilets designated for
all-gender use as long as the total number of toilets
provided meets the requirements of 1526(a), all single-
user toilets are designated for all-gender use, and all
multi-user separate toilet facilities are provided in equal
number to each sex. 1526(a)(2)
C. Toilets must be kept clean and supplied with toilet paper.
1526(d)
D. Toilets are not required for mobile crews if transportation to
nearby toilets is available. 1526(e)
E. One washing station must be provided for each 20
employees or fraction thereof. 1527(a)
F. Washing stations must be clean and have an adequate
supply of soap, water, and single-use towels (or warm air
blower). 1527(a)
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G. Washing station must have a sign indicating water is for
washing. 1527(a)(1)(F)
H. Wash stations are to be located outside and not attached to
the toilet facility. 1527(a)(1)(F)
Exception: Where there are less than ve employees and
only one toilet facility is required, the wash station may be
located inside the toilet facility.
I. If showering is required by the employer, the shower must
meet specic requirements. 1527(a)(3)
J. An adequate supply of potable (drinkable) water must be
provided at each job site. The employer shall take one or
more of the following steps to ensure every employee has
access to drinking water: 1524(a)
1. Provide drinking fountains.
2. Supply single-service cups.
3. Supply sealed one-time use water containers.
4. Ensure reusable, closable containers are available for
individual employee use.
Note: Additional requirements for the provision of drinking
water in outdoor places of employment are contained in 3395.
Tools and Equipment
General requirements for tools and equipment include:
• Tools must be kept clean and in good repair. 1699
• Only trained or experienced employees may operate
tools, machines, or equipment. 1510(b)
• Power-operated tools must be grounded or of the double-
insulated type. If double-insulated types of tools are used,
the equipment shall be distinctively marked. 2395.45
• Power-operated tools should be kept out of wet
locations. 2395.45
A. Power-operated tools shall be grounded under the following
conditions: 2395.45
1. Utilization equipment used in hazardous (classied)
locations (See Article 59).
2. Hand-held motor-operated tools, stationary and xed
motor-
operated tools, and light industrial motor-operated
tools.
3. Motor-operated tools and utilization equipment of the
following types: Drills, hedge clippers, lawn mowers, snow
blowers, wet scrubbers, sanders, and saws.
4. Tools likely to be used in wet and conductive locations.
Notes:
» The following shall not be required to be grounded:
2395.45
i. Listed portable tools or utilization equipment likely to
be used in wet and conductive locations if supplied
through an isolating transformer with an ungrounded
secondary of not over 50 volts.
ii. Listed or labeled portable tools and utilization
equipment protected by an approved system
of double insulation. Where such a system is
employed, the equipment shall be distinctively
marked.
» Double-insulated type power-operated tools are not
required to be grounded.
B. Guards required by the SOs must not be removed or
deactivated. 3942
C. Control switches for powered hand tools are subject to the
regulations noted below:
1. The following tools must be equipped with a constant-
contact (dead-man) on-o switch: 3557(a)
a. Drills
b. Tappers
c. Fastener drivers
d. Grinders
e. Disc and belt sanders
f. Reciprocating saws
g. Circular saws
h. Chain saws
i. Concrete vibrators
j. Concrete breakers
144 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Tools and Equipment | July 2022 145
k. Concrete trowels
l. Powered tampers
m. Jackhammers
n. Rock drills
o. Tools similar to those above
2. Hoisting or lowering electric tools by their cords is
prohibited. 1707(a)
D. Powder-actuated tools (PAT) shall be approved for their
intended use as dened in 1505, or have California approval
numbers. 1684(a)(1), (2)
1. Only trained workers holding a valid operator’s card may
use a PAT. 1685(a)(1)
2. Containers must be lockable and bear a label that says
POWDER-ACTUATED TOOL on the outside. The storage
container must be kept under lock and key. 1687(a)
3. The PAT must be provided with the following:
a. An operating and service manual
b. A power load and fastener chart
c. An inspection and service record
d. Repair and servicing tools. 1687(b)
4. Limitations on the use of PATs are as follows:
a. Workers must not leave the tool unattended. 1690(b)
b. Workers must not use the tool:
(1) In an explosive environment. 1690(a)
(2) On hard or brittle material. 1690(c)
(3) On easily penetrated or thin materials or materials
of questionable resistance unless backed. 1690(d)
(4) Within a 1/2-inch of the edge of steel. 1690(e)
(5) Within 3 inches of the edge of masonry. 1690(f)
(6) On thin concrete. 1690(g)
(7) On spalled areas. 1690(h)
(8) On existing holes. 1690(i)
5. Requirements for operating PATs are as noted:
a. Eye or face protection is required for operators and
assistants. 1691(b)
b. Operators must inspect the tool before using it. 1691(c)
c. Defective tools must not be used. 1691(d)
d. Tools must not be loaded until ready for use. 1691(g)
e. Tools must be unloaded if work is interrupted. 1691(h)
f. Operators must never point a loaded tool or an empty
tool at anyone. 1691(i)
g. The tool must be held in place for 30 seconds on
misre. 1691(l)
h. Dierent power loads must be kept in separate
compartments. 1691(m)
i. Warning signs that say POWDER-ACTUATED TOOLS
IN USE must be conspicuously displayed within 50 ft.
of a PAT operation. 1691(n)
j. Misres and skipped power charges must be stored
and disposed of properly. 1689(c), 1691(a)
E. Concrete-nishing tools must be equipped with a dead-man-
type control. 1698(d)
F. Airless spray guns must have an automatic or visible
manual release safety device or a diuser nut and tip guard.
3559.1(a)
G. Circular power saws are regulated as follows:
1. Portable Circular power saws:
a. All saws shall be equipped with guards above and
below the base plate or shoe. 4307(a)
b. Teeth on the upper half of the saw blade must be
permanently guarded. 4307(a)
Exception: The upper guard shall cover the saw to the
depth of the teeth, except for the minimum arc required
to permit the base to be tilted for bevel cuts.
c. Teeth on the lower half of the saw blade must be
guarded with a telescopic or hinged guard. The lower
guard must automatically and instantly return to the
covering position when the tool is withdrawn from the
work. 4307(b)
Exception: The lower guard shall cover the saw to the
146 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Tools and Equipment | July 2022 147
depth of the teeth, except for the minimum arc required
to allow proper retraction and contact with the work.
d. Saw guards must not be blocked open to prevent
guards from functioning. 4307(c)
2. Self-feed Circular power saws: 4301
a. In addition to guards over blades as specied in 4296,
feed rolls shall be protected by a hood or guard.
b. The employer shall ensure that power feed devices are
properly adjusted for each piece of stock in order to
reduce the possibility of kickback.
c. Every self-feed circular ripsaw shall be equipped with
an anti-kickback device installed on the infeed side.
Note: The arbor speed of circular saw blades shall not
exceed speeds recommended by the manufacturer.
H. Miter (chop) saws are regulated as follows: 4307.1
1. With the carriage in the full cut position, a guard must
enclose the upper half of the blade and at least 50 percent
of the arbor end. 4307.1(a)
2. With the carriage in the full retract (raised) position, lower
blade teeth must be fully guarded, and the guard must
extend at least 3/4-inch beyond the teeth. 4307.1(b)
3. Employers shall instruct employees to keep hands and
ngers outside the area below the blade until the blade
has come to a complete stop. 4307.1(c)
I. Stump cutters are regulated as follows: 3428
1. Stump cutters shall be equipped with enclosures or
guards to protect employees.
2. Each employee in the immediate area of stump grinding
operations shall wear PPE as required by Article 10 of
the GISO.
J. Radial arm (horizontal pull) saws are regulated as follows:
1. The upper half of the saw blade and arbor ends must be
completely covered. 4309(a)
2. The sides of the lower exposed portion of the blade shall
be guarded as per 4309(a)(2).
3. An anti-kickback device must be used during ripping
operations. 4309(c)
4. Saws must return automatically to the table’s back when
released. 4309(d)
5. Saws must have a stop provided to prevent the saw blade
from passing the front edge of the table. 4309(b)
K. Table saws are regulated as follows:
1. A hood must cover the saw to at least the depth of the
teeth. 4300(a)
2. The hood shall automatically adjust itself to the thickness
of the material being cut at the point where the stock
encounters the saw blade. The hood may be a xed or
manually adjusted hood or guard provided the space
between the bottom of the guard and the material being
cut does not exceed 1/4-inch. 4300(b), (c)
3. Table saws must be equipped with an anti-kickback device
during ripping operations. 4300(d)
4. Push sticks or push blocks shall be provided at the
workplace in the several sizes and types suitable for the
work to be done. 4300(f)
Note: The arbor speed of circular saw blades shall not
exceed speeds recommended by the manufacturer.
L. Band saws are regulated as follows:
1. All portions of the band saw blade must be guarded
except between the guide rolls and the table. 4310(a)(1)
2. Band saw wheels must be enclosed. 4310(a)(2)
M. Chain saws are regulated as follows:
1. Chain saws must be started on the ground or where it is
otherwise rmly supported. 3425(a)(2)
a. Chain saws must not be drop started, as dened in
3420.
b. Chain saws must not be started from an elevated
position unless the area below is clear of personnel.
2. Chain saws weighing more than fteen pounds used
in trees must be supported by a separate line or tool
lanyard, except when working from an aerial-lift device
or during topping or removing operations where no
supported limb is available. 3425(a)(3)
3. Chain saws must be equipped with a constant-pressure
control that returns the saw to idling speed when released.
3425(a)(4)
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4. A chain saw must not be started and operated unless
everyone, except the operator, is clear of the saw.
3425(a)(5)
5. A chain saw shall not be running when it is being carried
up into a tree. 3425(a)(6)
6. Chain saws must have a clutch adjusted to prevent the
chain drive from engaging at idling speed. 3425(a)(7)
7. Chain saws must be stopped when carried for a distance
longer than 100 feet, or in hazardous conditions such as
slippery surfaces or heavy underbrush. 3425(a)(8)
8. Chain brakes must be engaged or the engine stopped
when the saw is carried more than 10 feet in distance.
3425(a)(8)
9. The chain saw must be stopped for cleaning, refueling,
adjustments, and repairs except where manufacturers’
instructions require otherwise. 3425(a)(9)
10. If operating a chain saw in a tree, use a second point of
attachment such as a work-positioning lanyard or double-
crotched rope, unless the employer demonstrates that this
causes a greater hazard. 3425(a)(10)
11. Chain saws must be equipped with a quick shuto switch
readily accessible to the operator. 3425(a)(12)
N. Pneumatic tools are regulated as follows:
1. Safety clips are required on pneumatic tools to prevent
dies from being accidentally expelled from the barrel.
3559(a)
2. Pneumatic nailers and staplers must have a safety device
that prevents the tool from operating when the muzzle is
not in contact with the work surface. 1704(b)
Exception: Light-Duty Nailers and Staplers
3. Pneumatic nailers and staplers must be disconnected
from the air supply at the tool when performing any
maintenance or repair on the tool, or when clearing a jam.
1704(c)
4. The air hose of pneumatic nailers and staplers must be
secured at roof level to provide ample but not excessive
amounts of hose when an operator works on roofs sloped
steeper than 7:12. 1704(d)
5. All pneumatic hoses exceeding 1/2-inch inside diameter
shall have a safety device at the source of supply or branch
line to reduce pressure in case of hose failure. 1704(e)
6. Jackhammer operators must wear personal protective
equipment when required (see Personal Protective
Equipment section in this guide), including foot protection
as per 3385. Jackhammer operators must also use
hearing protection when noise levels exceed allowable
exposure levels as per 5096(a).
O. All portable pipe threading/cutting machines, portable power-
driven augers (earth drills), and portable power drives shall
be permanently equipped with a momentary contact device.
4086
Trac Control
Regulations concerning trac control are noted below:
A. Worksite trac controls and placement of warning signs
must conform to the requirements of the “California Manual
on Uniform Trac Control Devices for Streets and Highways,
January 13, 2012” published by the State Department of
Transportation. Additional means of trac control, such as
continuous patrol, detours, barricades, or other techniques
for the safety of employees may be employed. 1598(a)
B. Specications for the size and design of signs, lights,
and devices used for trac control shall be as described
in the “Manual,” pursuant to the provisions of California
Vehicle Code section 21400, which is incorporated by this
reference. 1598(b)
C. Employees (on foot), such as grade-checkers, surveyors,
and others exposed to the hazard of vehicular trac, shall
wear high-visibility safety apparel in accordance with the
requirements of 1598, 1599, and 1590.
Note: The warning garments such as vests, jackets, or shirts
shall be manufactured in accordance with the requirements
of the ANSI/ISEA 107-2004, High Visibility Safety Apparel
and Headwear. 1598(c)
D. Flaggers (see Flaggers section in this guide) are required
when the controls cited above are inadequate. 1599(a)
Note: The use of one agger under specied circumstances
is also permitted. 1599(a)
E. The employer shall select the proper type (class) of high-
visibility safety apparel for a given occupational activity
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by consulting the Manual, apparel manufacturer, ANSI/
ISEA 107-2004, Appendix B or the American Trac Safety
Services Association (ATSSA). 1599(f)
Training
Each year, serious and fatal injuries are caused by ineective
and inadequate training of employees. Employees who are
newly hired, given new job duties, or who are using tools and
equipment that they are unfamiliar with have a greater risk of
being injured.
A. Eective Training
Eective training relates directly to the work being done by
employees. It instructs employees on general safe work
practices and also provides specic information on the
hazards they may encounter in their jobs. In general, eective
training instructs employees on how to work safely and:
1. Communicates information in a language and by methods
understandable to all employees (including those who
do not speak English or have limited comprehension of
English)
2. Helps establish a relationship with employees to improve
trust and communication
3. Is participatory and involves employees by drawing on
their own real life experiences
4. Allows group hazard identication and problem solving by
means of demonstrations, asking questions, discussing
ideas, and providing observations and stories
5. Provides opportunities to demonstrate newly learned safe
work practices and the safe use of tools, equipment, and
chemicals
6. Provides concrete safety and health changes in how work
is set-up and performed
7. Is repeated as often as necessary
8. Encourages employees to express safety concerns and to
make suggestions
For help with your workplace training, see the Eective
Workplace Training eTool (www.dir.ca.gov/dosh/etools/09-002/
index.htm).
B. Training Requirements
The specic Cal/OSHA training requirements that apply
to each worksite depend on the work activities in which
employees are involved. Cal/OSHA has a list of Safety and
Health Training and Instruction Requirements organized
by training topics. This list has requirements contained
in the CSOs and GISOs (www.dir.ca.gov/dosh/dosh_
publications/TrainingReq.htm).
The SOs require training employees when:
1. They are rst hired. 1510(a), 3203(a)
2. They will operate machinery and equipment (see the
Qualied Person section in this guide).
3. They are given a new job assignment for which they have
not previously received training. 3203(a)(7)(C)
4. They are exposed to known job-site hazards, such as
poisons, hazardous materials and gases, harmful plants
and animals, etc. 1510(c)
5. New substances, processes, procedures, or equipment
are introduced to the workplace and represent a new
hazard. 3203(a)(7)(D)
6. The employer is made aware of a new or previously
unrecognized hazard. 3203(a)(7)(E)
7. Supervisors need to familiarize themselves with the
safety and health hazards to which employees under their
immediate direction and control may be exposed.
3203(a)(7)(F)
8. Tailgate or toolbox safety meetings are held (at least every
10 working days). 1509(e)
Exception: For tunneling operations tailgate meetings
must be held weekly. 8406(e)
Note: Cal/OSHA has a large number of regulations that
require employee training. The list above includes only some
of the Cal/OSHA regulations that require training.
The complete set of Cal/OSHA regulations in Title 8 can be
found at www.dir.ca.gov/samples/search/query.htm.
Tunnels and Tunneling
Employees working on tunneling operations are exposed to
numerous hazards, including:
152 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Tunnels and Tunneling | July 2022 153
1. Tunnel collapses;
2. Hazardous atmospheres; and
3. Explosive atmospheres.
Employees working on pressurized tunneling operations may
also be exposed to hazardous hyperbaric conditions.
When employees work in tunnels, underground chambers of any
depth, and shafts planned to exceed 20 ft. in depth, the following
operations are subject to the Tunnel Safety Orders (TSOs):
• Pipe-jacking and boring
• Micro-tunneling
• Mechanized tunneling
• Drill and blast work
• Excavation
• Ground support work
• Repair and maintenance
• Tunnel renovations
Employees who are exposed to or control the exposure of others
to hyperbaric conditions shall be trained in hyperbaric -related
physics and physiology, recognition of pressure-related injuries,
and how to avoid discomfort during compression. 6075(c)
The Mining and Tunneling (M&T) Unit of Cal/OSHA enforces the
TSOs, which include:
A. Classications: The M&T Unit is required to classify the gas
hazards of each tunnel or shaft. These classications are:
8422(a), (b)
1. Nongassy;
2. Potentially gassy;
3. Gassy; and
4. Extra hazardous.
Note: The request for classication shall be sent to the
nearest M&T Unit oce.
B. Pre-job safety conference: Before underground excavation
may begin, the M&T Unit must conduct an on-site, pre-
job safety conference with the project owner, the general
contractor, the tunnel contractor, and the tunnel contractor’s
employees. The goal of the conference is to ensure that all
of the employees are aware of the conditions under which
the tunnel will be driven and that all of the safety issues are
discussed and problems resolved. 8408
C. Certied persons: Cal/OSHA requires the persons
performing the duties of gas tester or safety representative
to be certied by passing a written and an oral examination
administered by the M&T Unit. 8406(f), (h)
1. A certied gas tester is required for the following
operations:
a. After blasting operations
b. Projects during which diesel equipment is used
underground
c. Hazardous underground gas conditions. 8406
2. A certied safety representative must direct the required
safety and health program and must be on-site while
employees are engaged in operations during which
the TSOs apply. The safety representative must have
knowledge in underground safety, must be able to
recognize hazards, and must have the authority to correct
unsafe conditions and procedures subject to the TSOs.
8406(f)
D. Diesel engines: Diesel engines are the only type of internal
combustion engine acceptable for use during tunneling
operations, provided that the following requirements are met:
1. Cal/OSHA must issue a permit for diesel engine operation.
2. Conditions of the permit must be observed.
3. Ventilation and fresh air ow must meet the required
minimum standards.
4. Air concentrations of nitrogen dioxide, carbon monoxide,
and carbon dioxide in the tunnel must be determined
at least once during each shift at the peak of diesel
operation and kept at or below the PELs.
5. A written record must be kept of the above readings.
6. PELs of the above air contaminants or any other
contaminants must not be exceeded.
7. A certied gas tester must conduct the testing (see
additional requirements in 8470).
8. An approved exhaust purier must be installed and
maintained (see the requirements in 8470).
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E. Materials, tools, and supplies being raised or lowered with a
crane or hoist shall be secured or stacked to prevent the load
from shifting, snagging, or falling, as required in 8500.
F. Licensed blasters: All blasting at tunnel sites shall be carried
out or directly supervised onsite by a California licensed
blaster as required by TSO 8560.
Welding, Cutting, and Other
Hot Work
Each year, numerous deaths from explosions, electrocutions,
asphyxiation, falls, and crushing injuries are associated with
hot work activities. These deaths from hot work often occur
in conned or restricted spaces. In addition, numerous health
hazards, including heavy metal poisoning, lung cancer, metal
fume fever, ash burns, and welders ash (burn to the eyes) are
associated with exposure to fumes, gases, and ionizing and
non-ionizing radiation formed or released during welding, cutting,
brazing, and other hot work.
A. Before workers begin hot work, the following controls must be
established:
1. No welding is permitted in an explosive environment. 4848
2. A written “hot work” permit is recommended whenever a
combustible environment may exist. 4848
3. All combustible materials in the work area must be
removed or shielded. 4848
4. Suitable re extinguishers that meet NFPA and ANSI
Standards must be provided in the work area. 4848
5. Welding blankets, curtains, and pads shall be approved
for their intended use in accordance with section 3206.
4848(b)
6. Employers must instruct employees on hot work safety.
4848(a)
7. Welders must be required to wear:
a. Non-ammable gloves with gauntlets. 3384
b. Appropriate foot protection. 3385
c. Aprons (leather) and shirts that have sleeves and
collars. 1522(a)
d. Helmets, hoods, and face shields suitable for head
protection. 3381(a), 3382(a)
e. Suitable eye protection. 3382
f. Respiratory protection (as required). 5144
g. Screens must be provided to protect the eyes of non-
welders from ash burns and ultraviolet light rays.
3382(b)
B. Gas welding is regulated as follows:
1. Fuel gas and oxygen hoses must be distinguished from
each other. 1742(a)
2. Couplings must not disconnect by means of a straight- pull
motion. 1742(g)
3. Oil or grease must never come into contact with oxygen
equipment. 1743(c)
4. Oxygen from a system without a pressure regulation
device must never be used. 1743(e)
5. Gas cylinders must be stored and used as follows:
a. Cylinders must be protected from all heat sources.
1740(a)
b. Cylinders containing oxygen, acetylene, or fuel gases
shall not be taken into conned spaces. 1740(b)
c. Acetylene and fuel gas cylinders, including but not
limited to welding and cutting fuel gas cylinders, shall be
stored and used with the valve end up. 1740(b)
Exception: Fuel gas cylinders containing fuel gas used
to power industrial trucks regulated by Article 25 of the
GISO.
d. All gas cylinders in service shall be securely held in
substantial xed or portable racks, or placed so they will
not fall or be knocked over. 1740(c)
e. Cylinders must be handled in suitable cradles with
their valve caps installed; they must never be lifted by
magnet, rope, or chain. 1740(c), (d)
f. Cylinders must not be placed where they might form a
part of any electric circuit. 1740(e)
g. Oxygen cylinders in storage shall be separated from
fuel gas cylinders or combustible materials (especially
oil or grease), a minimum distance of 20 ft. or by a
156 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Wildre Smoke | July 2022 157
noncombustible barrier at least 5 ft. high having a re-
resistance rating of at least one-half hour. 1740(g)
h. Valve stem wrenches must be left in place while
cylinders are in use. 1743(g)
i. A re extinguisher rated at least 10 B:C must be kept
near the operation. 1743(j)
j. Backow protection is required. 4845(b)
C. Arc welding is regulated as follows:
1. Cables in poor condition must not be used; no cable may
be spliced within 10 ft. of the electrode holder. 4851(e)(2)
2. The frames of arc welding and cutting machines must be
grounded. 4851(f)(5)
3. Electrodes and holders that are not in use shall be
protected so they cannot make electrical contact with
employees or conducting objects. 4851(g)
4. Defective equipment must not be used. 4851(j)
D. Ventilation regulations for welding, cutting, and brazing
operations require that workers’ exposures to hazardous
fumes, gases, and vapors be reduced below PELs. 1536,
1537, 5155
1. Outdoor operations
Respirators are required for any operation involving
beryllium, cadmium, lead, or mercury. For other operations
and materials, respirators are not required when natural
or mechanical ventilation is sucient to prevent exposure
to airborne contaminants in excess of the PELs noted in
5155. 1536(c).
2. Indoor operations
Respirators shall be used when local exhaust or
mechanical ventilation is not feasible or able to prevent
exposures that exceed limits specied in 5155.
E. In enclosed spaces supplied-air respirators shall be used
when local exhaust ventilation is not an eective means for
preventing potentially hazardous exposures. 1536(b), 5152
F. Employer needs to include all potentially hazardous
materials involved in welding and cutting such as uxes,
coatings, coverings, and ller metals in the HAZCOM
program. Employer also must provide employee access to
labels and safety data sheets, and train employees, as per
5194, 5150.
Wildre Smoke
Smoke from wildres contains chemicals, gases and ne
particles that can harm health. The greatest hazard comes from
breathing ne particles in the air (PM2.5), which can reduce
lung function; worsen asthma and other existing heart and
lung conditions; and cause coughing, wheezing and diculty
breathing. When the current Air Quality Index (AQI) for PM2.5 is
151 or higher, and workers may be exposed to wildre smoke,
employers are required to protect their workers.
A. Determine if the air is harmful, using one of the following two
methods: 5141.1(c)
1. Check AQI forecasts and the current AQI on a website
specied in 5141.1(c), or subscribe to emails or texts.
2. Use a direct reading instrument in accordance with
Appendix A of 5141.1 to check the current AQI at the
start of each shift and periodically throughout the day.
B. Protect workers if the current AQI for PM2.5 is 151 or higher
outside:
1. Communicate: 5141.1(d)
a. Inform workers about the current AQI and the
measures the employer is taking to protect them.
b. Encourage workers to inform the employer of
worsening air quality and any symptoms that might be
caused by exposure to wildre smoke.
2. Train and instruct workers on the items contained in
Appendix B of 5141.1, at a minimum:
a. Health eects of wildre smoke.
b. The right to obtain medical attention without fear of
retaliation.
c. How to nd out the AQI for PM2.5.
d. The requirements of title 8 section 5141.1.
e. The employer’s two-way communication system.
f. The employer’s methods to protect workers from
wildre smoke.
g. The importance, limitations, and benets of using a
respirator when exposed to wildre smoke.
h. How to properly put on and use the respirators
158 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Work Over or Near Water | July 2022 159
provided by the employer.
3. Control worker exposures to wildre smoke so that
exposure to PM2.5 is below an AQI of 151:
a. Use engineering controls, such as providing enclosed
buildings, structures, or vehicles where the air is
ltered. 5141.1(f)(1)
b. If engineering controls are not enough, use
administrative controls, such as moving the work to a
location with less exposure to wildre smoke, changing
the work schedule, or taking more breaks. 5141.1(f)(2)
c. Provide respirators, such as N95: 5141.1(f)(3)
• If AQI is from 151 to 500, provide respirators for
voluntary use.
• If AQI is above 500, provide respirators and require
their use.
Wood Preservative Chemicals
Wood preservatives that contain creosote, pentachlorophenol,
inorganic arsenic, and chromates are widely used. Because
these chemicals are carcinogens, exposures to employees must
be eliminated or reduced to the lowest levels possible below
the PELs by using eective engineering controls (for example,
enclosure or connement of the operation, general and local
exhaust ventilation, and substitution of less toxic materials).
When eective engineering controls are not feasible, or while
they are being instituted, use of NIOSH-approved respirators
is required to eliminate harmful airborne exposures to these
chemicals. 5141, 5144(a), and 5214
When the probability of skin or eye irritation exists, workers must
use appropriate protective clothing and equipment, such as
coveralls, gloves, shoes, face shields, or impervious clothing.
Work Over or Near Water
A. At locations where there is danger of drowning, employees
shall use the following safety devices unless protected by
appropriate fall protection measures: 1602(a)
1. Personal Flotation Devices (PFD).
2. Ring buoys.
3. Lifesaving boats.
B. Ramps used by vehicles to access the barges shall be
strong, have side boards, be maintained, and be secured.
1603(a)
C. When employees can’t step safely from a wharf, oat, barge,
or riverboat tow, a ramp compliant with 1603(a) or a safe
walkway needs to be provided. 1603(b)
D. All means of access to wharves, oats, barges, and boats
shall be adequately illuminated for their full length. 1603(g)
E. Decks and other working surfaces of barges shall be
maintained in a safe condition, as per 1511, and 1603.1.
160 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 List of Acronyms | July 2022 161
List of Acronyms
AB 1127: Assembly Bill 1127
ACCM: asbestos-containing construction material
ACGIH: American Conference of Industrial Hygienists
ACM: asbestos-containing material
AEGC program: assured equipment grounding conductor
program
ANSI: American National Standards Institute
AQI: Air Quality Index
ASSE: American Society of Safety Engineers
ASTM: American Society for Testing and Materials
ATSSA: American Trac Safety Services Association
˚C: Degree Celsius temperature scale
Cal/OSHA: California Occupational Safety and Health
Administration
Ca PE: California Registered Professional Engineer
CARB: California Air Resources Board
CASOs: Compressed Air Safety Orders
CAZ: controlled access zone
CCR: California Code of Regulations
CFR : Code of Federal Regulations
CO
2
: carbon dioxide
CSHIP: Construction Safety
and Health Inspection Project
CSOs: Construction Safety Orders
cu. ft.: cubic feet
cu. yd.: cubic yard
d: Penny size of nails
dBA: a unit of sound level as measured on the A-scale of a
standard sound level meter
DOSH: Division of Occupational Safety and Health
EMS: emergency medical service
ESOs: Electrical Safety Orders
eTool: electronic educational products for safety and health
˚F: Degree Fahrenheit temperature scale
FP: fall protection
FPP: fall protection plan
ft.: feet
GFCI: ground-fault circuit interrupter
GHS: Globally Harmonized System
GISOs: General Industry Safety Orders
HAZCOM program: hazard communication program
HEPA: high-eciency particulate air
HP: hearing protection
IDLH: immediately dangerous to life or health
IIPP: Injury and Illness Prevention Program
in.: inches
ISEA: International Safety Equipment Association
LAZ: limited access zone
LEL: lower explosive limit
MSHA: Mine Safety and Health Administration
NFPA: National Fire Protection Association
NIOSH: National Institute for Occupational Safety and Health
NO
x
: Oxides of Nitrogen
o.c.: on center
OPU: order to
prohibit use
PACM: presumed asbestos-containing material
PAT: powder-actuated tool
PEL: permissible exposure limit
PFA: personal fall arrest
PFP: personal fall protection
PFR: personal fall restraint
162 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Index | July 2022 163
PM2.5: particulate matter 2.5 micrometers or less in size
PPE: personal protective equipment
psf: pounds per square foot, unit of pressure
psi: pounds per square inch, unit of pressure
QP: qualied person
RMI: repetitive motion injury
SAR: supplied-air respirator
SDS: safety data sheet
SO: safety order
sq. ft.: square feet
T8 CCR: Title 8 of the California Code of Regulations
tsf: tons per square foot
TSOs: Tunnel Safety Orders
TWA: time-weighted average
V: volt, unit of electric voltage
Index
The subject headings are provided in all bold type fonts.
About this Pocket Guide, 5
Abrasives 18–19, 104–105,137
Access, 6–7
aerial devices, cranes, 6, 7
elevators, 7
ladders, 6, 7
personnel hoist, 7
ramps and runways, 7
stairways, 6, 7
Administrative Requirements, 7–11
certication, 7, 8, 11
licensing, 11
notication, 8, 9, 10
permitting, 8, 9, 10, 11
posting, 8–9
recordkeeping, 8, 9
registration, 8, 9, 11
Aerial Devices and Elevating Work Platform Equipment, 12–13
aerial devices, 12–13
elevating work platform, 12–13
fall protection, 12
Airborne Contaminants and Dust, 13
airborne contaminants, 13
dust, 13
Air Compressors, 14
permit, 14
warning signs, 14
portable air compressors, 14
Airless spray guns,145
Annual permit, 10, 40
Asbestos, 8-11, 13, 14–19
certication, 16
monitoring, 15–17
notication, 9, 15–16
permissible exposure limit, 15–16
registration, 15
respiratory protection, 17
training, 16, 18
164 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Index | July 2022 165
Augers, 149
Backup alarm, 92
Band saws, 147
Barricades, 41, 43, 52, 61, 72, 91, 94, 100, 133, 149
Benching, 61–64
Blasting (Abrasives/Sand), 19
respirator, 19
hearing protection, 19
body protection, 19
Blasting (Explosives), 19–20
license, 19, 20
storage, 20
safety rules, 20
transportation, 19–20
Boatswain’s chair, 69, 133
Body protection, 19, 111
Boom cranes, 31, 39
Bracket scaolds, 135
Brakes, 12, 75, 76, 91, 92, 114
aerial devices, 12
forklifts, 75, 76
haulage vehicles, 92–93
Cab (vehicle), 92
Cadmium, 10, 13, 22, 156
Cal/OSHA poster, 8, 50
Canopy, 40, 75, 92
demolition, 40
forklift, 75
haulage equipment, 92
Carcinogens, 21
reporting requirements, 21
SDS, 21
Certication, 7, 8, 11, 16, 32, 39, 78, 96, 106, 153
administrative requirements, 7, 8
asbestos, 16
cranes, 11, 32, 39
falsework, 78
gas tester, 153
IIPP, 96
lead, 106
Chain saws, 143, 147–148
Chutes, 40–41
Circular saws, 143, 146, 147
Clean-up, 16-18, 65, 81, 94, 103–104
Asbestos, 16–18
Explosion hazards, 65
Lead, 103–104
Code of Safe Practices, 21–22
posting, 22
safety meetings, 22
Combustible dusts, 65
Combustible liquids, 73–74
Combustible materials, 71, 154–155
Competent Person, 22
asbestos, 22
bolting, riveting, 22
cadmium, 22
excavation, 22
fall protection, 22
lift-slab construction, 22
pressurized worksites, 22
Concrete Construction, 22–27
concrete nishing, 27
nishing tools, 27
forms/falsework, 23
impalement hazards, 24–26
limited access zone, 23–24
masonry construction, 23–24
personal fall protection, 24
precast, 24
protective covers, 24–26
rebar, 22–24, 26–27
tilt-up panel, 24
Conned Spaces, 27–30
atmospheric testing, 29
conditions, 27–28
denition, 27
entry/exit, 29
examples, 27–28
permit-required, 28–30
166 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Index | July 2022 167
written program, 29
ventilation, 29
Construction elevators, 48–49
Controlled access zone, 8, 69
Corrosive Liquids, 31
eyewash, 31
HAZCOM program, 31
personal protective equipment, 31
SDS, 31
Covers (oor and roof openings), 52, 79–80, 121–122
Cranes, 31–40
assembly/disassembly, 33–34
certication, 31–32, 34, 39
general requirements, 32–33
inspection, 34
operation, 35–36
operational aids, 35
operator qualication, 39
power line safety, 33–34
regulations, 31
repairs, 34
safety devices, 35
side-boom cranes, 39
signaling, 35, 36–39
training, 32, 36, 39
wire ropes, 34-35
work area control, 36
Demolition, 40-42
crane demolition work, 41–42
hazards, 40-41
permit, 40
pre-demolition survey, 40
techniques, 40-41
Derricks, 7, 11, 31-32-,34, 35-36, 39
DOSH permit, 14, 40, 123
Drinking water, 85–90, 83, 84, 86, 142
Dust, Fumes, Mists, Vapors, and Gases, 42–43
common sources, 42–43
ventilation, 42
respiratory protection, 42
Earth-moving equipment, 92–93
Electrical, 43–48
arc, 44, 46
general requirements, 43–45
GFCI, 46
grounding, 45, 46–48
high voltage, 44–45, 47–48
lock-out procedures, 48
low voltage, 43–44
minimum safe distances, 47
protective equipment, 43, 44
warning signs, 43, 48
wiring methods, 45
Elevating work platform, 6, 12
Elevators, Lifts, and Hoists, 48–49
capacity, 48
inspection, 48, 49
maintenance, 49
requirements, 48
Emergency Medical Services, 49–50
access, 49
equipment, 50
rst aid, 49–50
training, 49
Employee rights, 105
Engine Exhaust Emissions, 50
exhaust devices, 50
prohibition, 50
Engineering controls, 13, 42, 112, 106, 111–112, 158
Erection and Construction, 51–54
erection plan, 51
fall protection, 51, 52, 54
oor openings/covers, 52
ooring, 53
structural steel, 51–53
trusses and beams, 51
wood frame, 53–54
Ergonomics in Construction, 54–56
contributing factors, 55
eliminating/reducing RMI, 56
recovery time, 55
requirements, 55–56
RMI symptoms, 55
Excavations, Trenching, Earthwork, 56–65
168 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Index | July 2022 169
barriers, 61
benching/shoring/sloping, 61–64
competent person, 57–58
inspection, 57
notication, 56–57
permit, 57
protective systems, 57–61
qualied person, 57
requirements, 56–58, 61
soil classication, 58–60
Explosion Hazards, 65–66
combustible dust, 65
ammable vapors, 65–66
LEL, 65–66
Explosives, 19–20, 40
Eye protection, 103, 121, 155
Eyewash, 31
Fall Protection, 66–71
controlled access zone, 69, 70
fall distance, 68, 69
fall protection plan, 69, 70
guardrails, 66, 68, 71
lifeline, 67
personal fall arrest, 66–67
personal fall protection system, 66, 70
personal fall restraint, 66–67
qualied person, 67, 69
residential construction, 68
roof slopes, 68–71
safety monitoring system, 70
Falsework, 11, 23, 54, 77–78, 80, 117
Finishing tools, 27, 145
Fire extinguishers 71–72, 121, 154, 156
Fire Protection and Prevention, 71–72
equipment, 71
extinguisher, 71–72
training, 72
water supply, 71
First Aid, 72
emergency medical services, 72
rst aid kit, 72
trained personnel, 72
Fit testing, 113
Flaggers, 72–73
apparel, 73
high-visibility apparel, 73
trac control, 72–73
training, 73
warning signs, 72–73
Flammable and Combustible Liquids, 73–74
closed containers, 73
HAZCOM, 74
leakage, 73
storage, 74
transportation, 74
usage, 74
Flexible cords, 45–46
Float scaolds, 69
Foot protection, 111, 149, 154
Forklifts, 74–76
certication, 76
elevating employees, 74–75
lifting capacity, 74
operating rules, 75
posting, 74, 75
regulations, 74
training, 75–76
Forms, Falsework, and Vertical Shoring, 77–78
access, 78
design, 77–78
design loads, 77
erection, 77
fall protection, 78
inspection, 77–78
Framing, 10, 54, 68
Fumes, 13, 42–43, 50, 81, 154, 156
Gas, 13, 27, 40, 42–43, 50, 65-66, 71, 81, 116, 120, 151, 152–153,
154–156, 157
Gas cylinder, 121, 155
Gas tester, 153
Generator, 46
GFCI, 46
170 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Index | July 2022 171
Grounding, 45–47
Guarding, 24, 44, 81, 93, 110
Guardrails, 78–80
applications, 79–80
elevator shaft openings, 80
fall protection, 78, 80
oor/roof openings, 79–80
mid-rail, 78–79
specications, 78–79
top rail, 78–79
wall openings, 80
Guards, 44, 100, 143, 145–146
Hand protection, 111
Hand signals, 37–38
Harness, 65, 67–68, 132
Haulage and earth-moving equipment, 92–93
Hazard Communication Program (HAZCOM), 81–83
labeling, 81–83
list of hazardous substances, 81
training, 81–83
program, 81–83
SDS, 81–83
safe handling, 81
Hazardous chemicals, 40, 81–83
Head protection, 65, 112, 155
Hearing protection, 19, 112, 149
Heat Illness Prevention, 83–90
emergency response, 85, 88–89
fainting, 83, 84
heat cramps, 83, 84
heat exhaustion, 83, 84, 90
heat rash, 83, 84
heat stress, 90
heat stroke, 83, 84–85, 90
high-heat procedure, 85, 87–88
shade, 85, 86–87, 89
symptoms, 83–85
training, 83, 87, 89–90
water, 85–90
written procedures, 85
Heavy Construction Equipment, 90–93
aggers, 91
haulage and earth-moving equipment, 92–93
safety requirements, 90–93
seat belts, 91–92
High voltage, 8, 13, 23, 29, 33, 44–45, 47–48
Highlift trucks, 8
Hitches, 134–135
Hoists, 7, 48–49
Horn, 35, 75
Horse scaold, 126, 136
Hot Pipes and Hot Surfaces, 93
Hot work, 154
Housekeeping/Site Cleaning, 94
ground areas, 94
storage areas, 94
work surfaces, 94
Impalement, 22, 24–26, 54, 68, 120
Industrial trucks, 6, 8, 74–76, 93, 155
Injury and Illness Prevention (IIP) Program, 94–96
code of safe practices, 95
elements, 94–95
employee rights, 96
general safety requirements, 95
recordkeeping, 95
requirement for construction, 95
safety training, 95–96
written program, 95–96
Insulated tools, 46, 113, 142, 143
Jackhammer, 144, 149
Knots, 94, 135
Ladders, 96–102
ladder size, 98
ladder types, 97–98
portable ladders, 97–99, 101
training, 101–102
Ladder jack scaold, 136
172 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Index | July 2022 173
Laser Equipment, 102–103
qualied person, 102
warning signs, 103
Lead, 103–106
blood lead monitoring, 105
certication, 106
monitoring, 106
permissible exposure limit, 104
personal protection, 104
pre-job notication, 106
protective requirements, 105
training, 104, 105, 106
trigger tasks, 104–105
warning signs, 105
Licensed blaster, 11, 19, 20, 154
Lifts, 6, 12, 40–41
Lighting, 106–107
minimum illumination, 107
night-time lighting, 107
Limited access zone, 23
Load weighing device, 35
Lock-out/Block-out Procedures, 107–110
blocking, 108, 109
energy control procedure, 108–109
extension tools, 108
notifying, 109
tagging, 108–109
training, 107–108
Low voltage, 43-44
Machine Guarding, 110
Masonry, 13, 23–24, 144
Mists, 42. 43, 81
Multi-Employer Worksites, 110–111
controlling employer, 111
correcting employer, 111
exposing employer, 110
creating employer, 110–111
Multi-unit roofs, 117–118, 119
Needle-beam scaolds, 69, 133–134
Non-sparking tools, 20
Overcurrent protection, 45
Overhead lines, 23, 31, 33, 45, 47
Oxygen breathing gas system, 116
Oxygen deciency, 27, 42, 56, 64
Paint, 15, 42, 51, 73, 81, 97, 99, 103–104, 128
Permissible exposure limit, 13, 15, 16, 17, 103, 104, 105, 106,
137, 153, 156, 158
Permit, 7, 8, 9, 10-11, 14, 19, 22, 27-30, 40, 48, 51, 57, 86, 123,
153, 154
Personal Protective Equipment, 111–113
body protection, 111–112
eye protection, 111
hand/foot protection, 111
head protection, 112
hearing protection, 112
respiratory protection, 112–113
Pile Driving, 113–115
fall protection, 114
hammer/hammer stop block, 113–114
Planking, 52, 80, 125–126
Platform, 6, 12–13, 53, 68, 70, 74–75, 79, 100, 107, 113–114,
118–120, 122–136, 141
forklift, 6, 74–75
roong, 118–120
scaold, 79, 122–136, 141
Pneumatic nailer, 69, 148
Pneumatic tool, 148
Posting, 7-8, 21, 22, 28, 41, 48, 50, 70, 74, 75, 78, 93, 95, 103, 105,
127
Powder-actuated tool, 9, 144–145
Power-operated tools, 142–143
Precast, 10, 24
Pre-job safety conference, 152
Pressurized Worksites, 115–116
decompression, 115–116
notication, 115
174 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Index | July 2022 175
regulatory requirements, 115–116
supervising physician, 116
ventilation, 116
Qualied Person, 116–117
Railings, 12, 24, 41, 49, 52, 53, 54, 61, 66, 68, 71, 74, 75, 78–80,
117, 118–121, 125, 127, 129, 131, 132, 136, 139, 140–141
Ramps and Runways, 117
foot ramps, 117
wheelbarrow ramps, 117
Rebar, 24–27
fall protection, 24
impalement protection, 24–26
supporting of rebar, 27
Recordkeeping, 9, 95, 138
Registration, 7, 8, 9, 11, 15, 96
Repetitive motion injury, 55–56
Reporting, 9, 19, 21, 56, 87–88, 96
accidents, 9
blasting, 9, 19
carcinogens, 10, 21
heat illness, 87–88
IIPP, 96
RMIs, 56
Respiratory protection, 8, 13, 17, 19, 42, 93, 104–105, 112–113,
121, 137–138, 155–156, 157–158
asbestos, 17, 42
dust, 19, 42
lead, 104–105
program, 8, 17, 113
silica, 138
welding, 42, 105, 155–156
wildre smoke, 157-158
Rollover protection, 75, 91
Roong Operations, 117–122
fall protection requirements, 118, 119, 120, 121–122
hot operations, 120–121
multi-unit roof, 118, 119
new-production type, 118, 120
roof openings, 121
single-unit roof, 117, 118–119
Safety apparel, 73, 91, 149
Safety conference/meeting, 11, 22, 95, 151–152
Safety factor, 67
Safety harness, 132
Safety monitoring system, 70
Safety nets, 66, 68
Safety precautions, 22, 95
Safety programs, 5–6, 11, 95
Safety training, 73, 76, 95–96, 101–102, 139–140, 150–151
Safety valve, 14
Sanitation, 116, 141
Saws, 18, 143, 145–148
band saw, 147
chain saw, 143, 147–148
circular saw, 143, 146, 147
guard, 143, 145–147
miter saw, 146
radial arm saw, 146–147
speed, 146, 147, 148
table saw, 147
Scaolds, 122–136
access, 123–124, 131
design and construction, 122–123
erecting and dismantling, 123
general requirements, 122–128
guardrails/railing, 127, 129
height limits, 127
horse scaold, 126, 127, 136
ladder jack scaold, 136
planking, 122, 124–126, 130, 132, 134
platforms, 124–125, 128, 131
prohibited scaolds, 127
prohibited work practices, 127–128
self-propelled rolling scaolds, 129–130
suspended scaold, 131–136
tower and rolling scaolds, 128–131
tube and coupler, 128, 133
window jack scaolds, 136
working load, 122, 126, 127
SDS, 21, 31, 81–83
Seat belts, 75, 91
176 Cal/OSHA Pocket Guide for the Construction Industry | July 2022 Index | July 2022 177
Serious injury or illness, 9, 19
Shafts, 50, 61, 64–65, 67, 68, 80, 140, 152
Shoring, 11, 22, 23, 54, 61, 77, 139
Silica Dust, 137–138
hazardous work activities, 137
control, 137–138
PELs, 137
silica-containing materials, 137
training, 138
Slings, 7, 35, 76
Sloping, 61–64
Soil classication, 58–61
Stairways, 138–139
illumination, 139
railings, 139
width, 139
Structural steel, 10, 51
Supplied-air respirators, 17, 19, 104–105, 156
Tailgate/toolbox safety meetings, 22, 95, 151
Tar/asphalt, 117–118, 121
Temporary Agencies, 139–140
injury/illness records, 140
responsibility, 139–140
training, 139–140
Thermal insulating material, 93
Toeboards, 140–141
clearance, 141
Toilets/Washing Facilities/Sanitation, 141–142
drinking fountain, 142
toilet facility, 141–142
washing station, 141–142
shower, 142
Tools and Equipment, 142–149
airless spray gun, 145
band saw, 147
chain saw 143, 147–148
circular saw, 143, 146, 147
concrete-nishing tool, 145
control switch, 143–144
guard, 143, 145–147
miter saw, 146
pipe threading machine, 149
powder-actuated tool, 144–145
power-operated tool, 142–143
pneumatic tools, 148–149
radial arm saw, 146–147
table saw, 147
Trac Control, 149–150
employees on foot, 149
agger, 149
high-visibility apparel, 149–150
Training, 150–151
eective training, 150
tailgate/toolbox meeting, 151
training requirements, 150–151
Trenching, 11, 50, 56–65
Tunnels and Tunneling, 151–154
certied persons, 153
classication of gas hazard, 152
diesel engine, 153–154
licensed blaster, 154
pre-job safety conference, 152–153
safety representative, 153
ventilation, 153
Vapors, 13, 42–43, 65–66, 81, 156
Ventilation, 18, 29, 42, 50, 65–66, 74, 116, 121, 153, 156
Vertical shoring, 11, 23, 54, 77, 139
Warning device, 92
Warning signs, 8–9, 14, 18, 43, 48, 72–73, 78, 82, 91, 103, 105, 145,
149
Water - drinking, 85–86, 87, 142
Welding, Cutting and Other Hot Work, 154–156
arc welding, 156
gas cylinder, 155–156
gas welding, 155–156
hot work permit, 154
respiratory protection, 155, 156
ventilation/exhaust, 156
Wells, 61, 64–65
178 Cal/OSHA Pocket Guide for the Construction Industry | July 2022
Division of Occupational
Safety and Health (DOSH)
Headquarters
1515 Clay Street, Suite 1901, Oakland, CA 94612
Phone (510) 286-7000
Internet www.dir.ca.gov/dosh
CAL/OSHA ENFORCEMENT
To report workplace accidents and le complaints, contact
the nearest Cal/OSHA Enforcement Oce listed below:
Regional Oces
San Francisco
(415) 557-0300
Sacramento
(916) 263-2803
Santa Ana
(714) 558-4300
High Hazard Unit
Santa Ana: (714) 567-7100
Oakland: (510) 622-3009
Monrovia
(626) 471-9122
District Oces
American Canyon
(707) 649-3700
Bakerseld
(661) 588-6400
Foster City
(650) 573-3812
Fremont
(510) 794-2521
Fresno
(559) 445-5302
Long Beach
(424) 450-2630
Los Angeles
(213) 576-7451
Modesto
(209) 545-7310
Monrovia
(626) 239-0369
Oakland
(510) 622-2916
Redding
(530) 224-4743
Sacramento
(916) 263-2800
San Bernardino
(909) 383-4321
San Diego
(619) 767-2280
San Francisco
(415) 557-0100
Santa Ana
(714) 558-4451
Van Nuys
(818) 901-5403
Wildre Smoke, 157–158
exposure controls, 158
respirators, 157, 158
training, 157–158
Window jack scaold, 136
Wiring method, 45–46
Wood Preservative Chemicals, 158
Work surfaces, 22, 24, 40, 66, 78, 79, 94, 127, 132, 148
Working load, 12, 97, 98, 102, 122–123, 126, 127
Work Over or Near Water, 158–159
Workplace Safety and Health, 5–6
Wrecking ball, 42
Cal/OSHA
Consultation
Services
Branch
TOLL-FREE
:
1-800-963-9424
California
Voluntary
Protection
Program
Oakland:
(510)
622-1081
Worker
Information
Hotline
For
telephone
numbers
and
website
addresses
to
help
workers
with
safety
and
health
and
other
workplace
concerns
call
DIR
’
s
Toll-Free
Number:
1-866-924-9757
Updated
July
2022
On-Site
Assistance
Program
Area
Offices
1
Sacramento
Northern
California
(916)
263-0704
2
Oakland
San
Francisco/Bay
Area
(510)
622-2891
3
Fresno
Central
Valley
(559)
445-6800
4
Van
Nuys
San
Fernando
Valley
(818)
901-5754
5
La
Palma
La
Palma,
Los
Angeles
Metro
Area,
Orange
County
(714)
562-5525
6
San
Bernardino
San
Bernardino,
Inyo
and
Riverside
Counties
(909)
383-4567
7
San
Diego
Imperial
and
San
Diego
Counties
(619)
767-2060
INTERNET
www.dir.ca.gov/dosh/consultation.html
E-MAIL
