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
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
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
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
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
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
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
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
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
Job-made ladders
ladder jack
scaffolds, 874-40026
step, platform,
and trestle ladder scaffolds, 874-40038
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
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
Nationally recognized testing laboratory, 874-30012,
874-30046
Needle beam scaffold
fall protection, 874-20056
securing, 874-30042
Outrigger beams, 874-30004
Outrigger scaffolds, 874-40028
Overhand bricklaying, guardrail systems, 874-20064
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
Qualified person
definitions,
874-500
designing scaffolds, 874-20002
intermixing or modifying components, 874-20006
training scaffolds workers, 874-20072
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
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)
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
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
Vertical lifelines, 874-20060
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
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