Scaffolds

Chapter 296-874, WAC

Effective Date: 10/06/07

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Access

integral prefabricated scaffolds access frames, 874-40020

ladders, 874-20024

platforms, 874-20020

ramps and walkways, 874-20030

stair towers, 874-20026

stair rails and handrails, 874-20028

supported scaffolds, erecting or dismantling, 874-40008

surfaces, 874-20032

Aerial lifts, exemption, 874-100

Altering scaffolds, (see erecting or dismantling)

Anchorage

horizontal lifelines, 874-20062

suspended scaffolds, additional support lines, 874-20068

tiebacks, 874-30008

vertical lifelines, 874-20060

Attachable, hook-on, and portable ladders, 874-20022

Jump to a letter:
A

Bearing supports, outrigger beams, 874-30004

Boatswain's chair

fall protection, 874-20056

minimum seat width, 874-20010

single-point adjustable suspension scaffolds, 874-30044

Boom-supported elevated work platforms, exemption, 874-100

Braking device or locking pawl, 874-30012

Bricklayers’ square scaffolds (squares), 874-40014

Bricklaying, guardrail exemption, 874-20064

Jump to a letter:
A

Canopy, support lines, 874-20068

Cantilevered loads, platforms, 874-20016

Carpenters’ bracket scaffolds, 874-40022

Casters (see wheels and casters)

Catenary scaffolds

fall protection, 874-20056

suspended scaffolds, wire ropes, 874-30032

Changing direction, platforms planks, 874-20014

Chapter application, scope, 874-100

Cleats, ramps and walkways, 874-20030

Clips, wire ropes, 874-30020

Competent person

definition, 874-500

design and construction, 874-20004

inspections, 874-20034

manila rope, 874-20064

metal components, intermixing, 874-20006

outrigger beams, direct connections, 874-30004

supported scaffolds, fall protection, 874-40010

suspended scaffolds, swaying, 874-30022

training, 874-20074

weather hazards, 874-20048

wire suspension ropes, 874-30016

Components, intermixing, 874-20006

Construction and design (see design and construction)

Construction or alterations, erecting or dismantling

scaffolds, 874-20004

Corrosive substances, 874-30026

Counterweights, suspended scaffolds, 874-30004-30006

Couplers (see tube and coupler scaffolds)

Crane or derrick, suspended personnel platform,

exemption, 874-100

Crossbraces

access, prohibited, 874-20020

guardrail systems, 874-20064

horse scaffolds, 874-40024

Jump to a letter:
A

Damaged or weakened scaffolds components, 874-20036

Decking or planking, platforms, 874-20008

Defects, inspection, 874-20034

Definitions, 874-500

Design and construction

competent person, 874-20004

general, 874-20002

integral prefabricated scaffolds access frames, 874-40020

ladder jack scaffolds, 874-40026

mobile scaffolds, 874-40012

outrigger scaffolds, 874-40028

pole scaffolds, 874-40030

portable, hook-on, and attachable ladders, 874-20022

suspended scaffolds, 874-30012

tube and coupler scaffolds, 874-40040

two-point adjustable suspension scaffolds (swing stages), 874-30046

Devices

emergency, escape and rescue, 874-30024

suspended scaffolds, support, 874-30010

Dismantling (see erecting or dismantling scaffolds)

Distance from work face, fall protection, 874-20054

Jump to a letter:
A

Eccentric loads, supported scaffolds, 874-40004

Electrical hazards, erecting or dismantling scaffolds, 874-20046

Elevating work platforms, exemption, 874-100

Emergency escape and rescue devices, 874-30024

Employee protection

energized power lines, minimum separation distance (table 2),
874-20046

falling objects, 874-20066, 874-20068

fall protection, 874-20052

platforms, working level height, 874-20042

slipping and tripping hazards, 874-20050

stair rail systems and handrails, 874-20028

weather hazards, wind screens, 874-20048

Energized power lines, 874-20046

Erecting or dismantling scaffolds

access, supported scaffolds, 874-40008

construction or alteration, 874-20004

electrical hazards, 874-20046

supported scaffolds, 874-40010

suspended scaffolds, 874-20052

platforms, 874-20008

training, 874-20074

Exemptions

overall, scope, 874-100

platforms, planking and decking, 874-20008

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A

Fabricated frame scaffolds (tubular welded frame scaffolds)

general requirements, 874-40018

integral prefabricated scaffolds access frames, 874-40002

Fall protection

distance from work face, 874-20054

employee protection, 874-20052

personal fall arrest system, 874-20052-20062

references, 874-20008, 874-20052

specific types of scaffolds, 874-20056

supported scaffolds, erecting or dismantling, 874-40010

Falling object protection, 874-20066, 874-20068

Falling hazards, 874-20028, 874-20052-20062, 874-20066

Float (ship) scaffolds

bearers, 874-30034

fall protection, 874-20056

Forklifts (see powered industrial trucks (PITs))

Form scaffolds, 874-40022

Foundations, supported scaffolds, 874-40006

Front-end loaders, supported scaffolds, 874-40006

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A

Gasoline-powered equipment, 874-30030

Guardrail systems

fall protection, 874-20052, 874-20054

falling object protection, 874-20066

general requirements, 874-20064

specific scaffolds, 874-20056

stair and handrails, 874-20028

stair towers, 874-20026

Guys, ties, or braces, on supported scaffolds, 874-40004

Jump to a letter:
A

Handrails and stair rails, 874-20028

Hazards

electrical, 874-20046

falling objects, 874-20066

falls, 874-20052-20062

slipping and tripping hazards, 874-20050

weather, 874-20048

Heat-producing processes, 874-30026

Height, toprail, top edge, 874-20064

Hoists, loads, 874-20044, 874-30012-30014

Hook-on, portable, and attachable ladders, 874-20022

Horizontal and vertical planes, supported scaffolds, 874-40004

Horizontal lifelines, 874-20062 (see also personal fall arrest system)

Horse scaffolds, 874-40024

Jump to a letter:
A

Independent support lines (see support lines)

Inspections, 874-20034

Installations

guardrail systems, 874-20066

midrail, 874-20064

supported scaffolds, 874-40004

Insulation, suspension ropes, 874-30028

Integral prefabricated scaffolds access frames, 874-40020

Interior hung scaffolds, roof structures, 874-30036

Jump to a letter:
A

Job-made ladders

ladder jack scaffolds, 874-40026

step, platform, and trestle ladder scaffolds, 874-40038

Jump to a letter:
A

Ladder jack scaffolds, 874-20010; 874-20056, 874-40026

Ladders

portable, hook-on, and attachable, 874-20022

stairway-type, 874-20024

type 1 or type 1A ladders, 874-40026

working level height, 874-20042

Lanyard, attached, personal fall arrest system, 874-20058

Large area scaffolds, stilts and ladders, 874-20042

Lean-to scaffolds, 874-20002

Lengths

platforms, 847-20016

suspension ropes, 874-30014

Lifelines, horizontal, 874-20060 (see also personal fall arrest system)

Loads

cantilevered, 874-20016

eccentric, 874-40004

general, 874-20038

hoisting, 874-20044

sag, 874-20018

Locking devices, horizontal lifelines, 874-20062

Jump to a letter:
A

Manila rope

boatswain's chair, 874-30044

competent person, 874-20064

Manually propelled elevating work platform,

exemption, 874-100

Manufacturer’s instructions, loading scaffolds, 874-20038

Masons' multi-point adjustable scaffolds, outrigger beams,
874-30004

Masons’ multi-point adjustable suspension scaffolds, 874-30040

Maximum intended load, supported scaffolds and scaffolds component, 874-20038; 874-40002

Midrails, installation, 874-20064 (see also guardrail systems)

Minimum width requirements, 874-20010

Minimum strength requirements, scaffolds components, 874-20036

Mobile scaffolds

moving, 874-40012

support, proper, 874-40006

Moving scaffolds

employee protection, 874-20040

erecting and dismantling, 874-20004

mobile scaffolds, 874-40012

Mud sills, 874-40006

Multi-level suspended scaffolds, support lines, 874-30038

Multi-point adjustable suspension scaffolds

fall protection, 874-20056

platforms, passage, 874-30040

swaying of suspended scaffolds, 874-30022

Jump to a letter:
A

Nationally recognized testing laboratory, 874-30012, 874-30046

Needle beam scaffold

fall protection, 874-20056

securing, 874-30042

Jump to a letter:
A

Outrigger beams, 874-30004

Outrigger scaffolds, 874-40028

Overhand bricklaying, guardrail systems, 874-20064

Jump to a letter:
A

Personal fall arrest systems

anchorage, 874-20060-20062

attached by lanyard, 874-20058

fall protection, 874-20058-20062

platforms, work face, 874-20054

Personnel platforms, exemptions, 874-100

Planking or decking, 874-20008

Planks, laying platforms, changing direction, 874-20014

Plastering and lathing operations, 874-20054, 874-20058-20062

Platforms

general, 874-20008-20020

ladders, supported scaffolds, 874-40038

multi-point adjustable suspension scaffolds, 874-30040

rest, on portable, hook-on, and attachable ladders, 874-20022

overlapping, abutting, or joining, 874-20012

Personal fall arrest system, 874-20062

Pole scaffolds, 874-40030

Portable, hook-on, and attachable ladders, 874-20022

Power

lines, energized, 874-20046

system, mobile scaffolds, 874-40012

Powered Industrial Trucks (PITs),

moving mobile scaffolds, 874-20012

personnel platforms, 874-100; 874-40006

Prefabricated scaffolds access frames, integral, 874-40020

Prohibitions

gasoline-powered equipment, 874-30030

wire suspension ropes, 874-30016

Pump jack scaffolds

brackets, braces and accessories, 874-40032

minimum platform width, 874-20010

Jump to a letter:
A

Qualified person

definitions, 874-500

designing scaffolds, 874-20002

intermixing or modifying components, 874-20006

training scaffolds workers, 874-20072

Jump to a letter:
A

Ramps and walkways, 874-20030

Rated load or maximum intended load, scaffolds components, 874-20038

References, fall protection, 874-20008, 874-20052

Registered professional engineer, 874-20040; 874-40018, 874-40028, 874-40030

Repairing scaffolds, 874-20036; 874-40034

Rest platforms, portable, hook-on, and attachable ladders, 874-20022

Retraining, 874-20076

Riser height, stair towers (note), 874-20026

Roof bracket scaffolds

minimum platform width, 874-20010

supported scaffolds, 874-40036

Roof structures, interior hung scaffolds, 874-30036

Ropes, suspension, 874-20062

Jump to a letter:
A

Safe access (see access)

Sag, platforms, 874-20018

Scaffold, definition, 874-500

Scaffolds hoists

general requirements, 874-30012

suspension rope, 874-30014

Scaffolds inspections, competent person, 874-20034

Scaffolds stairway (see stair towers)

Scaffolds components

damaged or weakened, minimum strength requirements, 874-20036

inspection, 874-20034

intermixing, 874-20006

maximum intended load or rated load, 874-20038

minimum strength requirements, 874-20036

Scaffolds, moving horizontally, exemptions, 874-20040

Scope, chapter application, 874-100

Self-contained adjustable scaffolds, fall protection, 874-20056

Self-propelled elevating work platforms, exemption, 874-100

Sheaves, two-point adjustable suspension scaffolds (swing stages), 874-30046

Ship scaffolds (see float (ship) scaffolds)

Single-point adjustable suspension scaffolds

general requirements, 874-30044

fall protection, 874-20056

Single-point or two-point adjustable suspension, vertical lifelines, 874-20060

Slip-resistant surfaces

stairway-type ladders, 874-20024

stair towers treads and landings, 874-20026

Slipping and tripping hazards, employee protection, 874-20050

Snow and ice, weather hazards, 874-20050

Specific types of scaffolds, 874-20056

Stair towers (stairways), 874-20026, 874-20028

Stairway-type ladders, 874-20024

Stall loads, hoists, 874-30012

Steel or plastic banding, toprail or midrail, 874-20064

Step, platform, and trestle ladder scaffolds, 874-40038

Stilts and ladders, large area scaffolds, 874-20042

Stonesetters’ multi-point adjustable suspension scaffolds, 874-30040

Strength requirements, minimum

damaged or weakened scaffolds, 874-20036

supported scaffolds, 874-40002

suspended scaffolds, 874-30002

suspension ropes, 874-30002

Structural integrity, 874-20006, 874-20034

Supervising, moving scaffolds, 874-20004

Support devices, tiebacks, suspended scaffolds, 874-30010

Support lines

suspended scaffolds with canopy, 874-20068

used with lifelines, 874-20060-20062

Supported scaffolds

bricklayers’ square scaffolds (squares), 874-40014

carpenters’ bracket scaffolds, 874-40022

definitions, 874-500

erecting or dismantling, 874-40008, 874-40010

fabricated frame scaffolds (tubular welded frame scaffolds), 874-40018

form scaffolds, 874-40022

horse scaffolds, 874-40024

integral prefabricated scaffold access frames, 874-40020

ladder jack scaffolds, 874-40026

mobile, 874-40006, 874-40012

outrigger, 874-40028

pole scaffolds, 874-40030

preventing tipping, 874-40004

pump jack scaffolds, 874-40032

repair bracket, 874-40034

roof bracket, 874-40036

step, platform and trestle ladder, 874-40038

supported properly, 874-40006

tube and coupler scaffolds, 874-40040

tubular welded frame scaffolds (see fabricated frame scaffolds)

window jack scaffolds, 874-40042

Suspended scaffolds (see also boatswain’s chair)

catenary scaffolds, 874-30032

counterweights, 874-30006

definitions, 874-500

equipment, support lines, 874-20068

emergency escape and rescue devices, 874-30024

fall protection, erecting or dismantling scaffolds, reference, 874-20052

float (ship) scaffolds, 874-30034

gasoline powered equipment, prohibited, 874-30030

hoists, 874-30012, 874-30014

interior hung, 874-30036

multi-level, 874-30038

multi-point adjustable suspension scaffolds, 874-30040

needle beam scaffolds, 874-30042

outrigger beams, 874-30004

single-point adjustable, 874-30044

strength requirements, 874-30002

support devices, 874-30010

support lines, with canopy, 874-20068

suspension ropes, 874-30026

tiebacks, 874-30008

two-point adjustable suspension scaffolds (swing stages), 874-30046

two-point and multi-point suspension scaffolds, 874-30022

U-bolt clips, 874-30020

welding, 874-30028

wire rope, 874-30016-30020

Suspension ropes, independent support lines, anchorage, 874-20060-20062, 874-20068

Swaying, two-point adjustable suspension scaffolds (swing stages), 874-30022

Swing stages (see two-point adjustable suspension scaffolds)

Jump to a letter:
A

Tables

minimum platform width (table 1), 874-20010

minimum separation distance from energized power lines (table 2), 874-20046

minimum toprail and midrail strength requirements (table 3), 874-20064

suspended scaffolds strength requirements (table 4), 874-30002

Tag lines, controlling loads, 874-20044

Testing hoists, nationally recognized testing laboratory, 874-30012

Testing platforms, nationally recognized testing laboratory, 874-30046

Tiebacks

general requirements, 874-30008

outrigger beams, 874-30004

support devices, 874-30010

Tipping platforms, design and installation, 874-20016

Tipping, prevention

mobile scaffolds, when moving, 874-40012

supported scaffolds, 874-40004

Toeboards, 874-20066, 874-20070

Top plate scaffolds, minimum platform width, 874-20010

Toprail and midrail

platforms, 874-20064

stairways, 874-20028 (see also guardrail systems)

Training

erect, dismantle, operate or maintain, 874-20074

general requirements, 874-20072

retrain, 874-20076

Tripping and slipping hazards, employee protection, 874-20050

Trestle ladder scaffolds, 874-40038

Tube and coupler scaffolds, 874-40040

Tubular welded frame scaffolds (see fabricated frame scaffolds)

Two-point adjustable suspension scaffolds

fall protection, 874-20056

swing stages, 874-30046

Two-point and multi-point suspension scaffolds, swaying, 874-30022

Types of scaffolds, specific, 874-20056

Type 1 or Type 1A ladders, 874-40026

Jump to a letter:
A

U-bolt clips, suspended scaffolds, 874-30020

Uninsulated welding lead, suspension ropes, 874-30028

Unstable objects

supporting scaffolds, 874-40006

used for additional height, 874-20042

Uprights, supported scaffolds, 874-40004

Jump to a letter:
A

Vertical lifelines, 874-20060

Jump to a letter:
A

Walkways

access, 874-20030

fall protection, 874-20056

minimum width, 874-20010

planking or decking, 874-20008

Weather hazards, 874-20050

Welding

suspended scaffolds, 874-30028

suspension ropes, 874-30026

Wheels and casters, mobile scaffolds, 874-40006, 874-40012

Wind screens, employee protection, 874-20048

Winding drum hoists, scaffolds hoists, 874-30014

Window jack scaffolds, 874-20046, 874-40042

Wire ropes (see also wire suspension rope)

catenary scaffolds, 874-30032

clips, suspended scaffolds, 874-30020

competent person, 874-30016

connections, 874-30018

Wire suspension ropes

condition, 874-30016

connections, 874-30018

Wood platforms, 874-20008

Wood poles, pump jack scaffolds, 874-40032

Wooden-bracket form scaffolds, 874-40022

Working level height, increasing, 874-20042

Labor & Industries (L&I), Washington State

Rules & Policies

Scaffolds

Chapter 296-874, WAC

Index