Washington Administrative Code

(1) You must make sure a written emergency action plan is developed and implemented for each kind of working platform operation that contains at least both of the following:(a) An explanation of the emergency procedures to be followed in the event of any of the following situatio…

(1) You must certify in writing that employees have been trained in operating and inspecting a working platform.(2) You must make sure training certifications are:(a) Prepared when the employee has completed training; and(b) Contain all of the following:(i) Name of the person tra…

SummaryImportant:This section applies to permanent powered platform installations that meet all of the following:(1) The installation was completed between August 27, 1971, and July 24, 1990;(2) There has been no major modification to the installation after July 23, 1990; and(3) …

(1) You must make sure powered platforms designated as Type F meet all the requirements in Part II of ANSI A120.1-1970, American National Standard Safety Requirements for Powered Platforms for Exterior Building Maintenance.(2) You must make sure powered platforms designated as Ty…

(1) You must make sure the fall protection system of both Type F and Type T powered platforms meet the requirements of chapter 296-880 WAC, Unified safety standards for fall protection.(2) You must make sure working platforms have permanent guardrails that meet all of the followi…

(1) You must make sure electrical wiring and equipment meets the requirements of the National Electric Code, NFPA 70-1987, ANSI C1-1987, except as modified by ANSI A120.1-1970 American National Standard Safety Requirements for Powered Platforms for Exterior Building Maintenance.(…

SummaryImportant:This section applies to permanent powered platform installations that meet either of the following:(1) Were completed after July 23, 1990;or(2) Have had major modifications done to an existing installation after July 23, 1990.Note:If affected parts of the buildin…

(1) You must make sure structural supports, tie-downs, tie-in guides, anchoring devices and any affected parts of the building included in the installation are designed by, or under the direction of, a registered professional engineer experienced in such design.(2) You must make …

(1) You must make sure the exterior of each building is provided with at least one of the following stabilization systems:(a) Continuous tie-in guides;(b) Intermittent stabilization system;(c) Button guide stabilization system;(d) System using angulated roping and building face r…

Note:This system may be used with a continuous tie-in guide system on the same building as long as the requirements for each system are met.(1) You must make sure an intermittent stabilization system:(a) Keeps the equipment in constant contact with the building; and(b) Prevents s…

(1) You must make sure the guide buttons are:(a) Coordinated with the platform guide tracks and other platform-mounted equipment; and(b) Located on the building so they properly engage the guide tracks mounted on the platform.(2) You must make sure two guide buttons engage each g…

(1) You must make sure a stabilization system using angulated roping and building face rollers does all of the following:(a) Keeps the equipment in continuous contact with the building face;(b) Prevents sudden horizontal movement of the platform; and(c) Maintains a stabilizing fo…

(1) You must make sure hanging lifelines and all other cables not in tension are stabilized after the initial two hundred feet (61 m) of vertical travel of the working platform and every two hundred feet (61 m) thereafter.(2) You must make sure hanging cables which are in constan…

(1) You must make sure, when full load is applied to the equipment power circuit, that the building electrical wiring does not allow more than a five percent voltage drop from the building service vault voltage at any power circuit outlet used by the powered platform installation…

(1) You must make sure employees working on a roof or other elevated working area four feet (1.2 m) or more above an adjacent safe surface are protected by a perimeter guarding system.Reference:Requirements for the perimeter guarding system are found in chapter 296-880 WAC, Unifi…

(1) You must make sure all carriages and carriage-supported equipment can be traversed to a safe area for storage and maintenance.(2) You must make sure operational areas for trackless type equipment have structural stops, such as curbs, to prevent equipment from traveling outsid…

You must make sure repair or major maintenance of parts of the building that provide primary support for suspended equipment does not affect the ability of the building to meet the requirements of this chapter.[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050. WSR 15-23-0…

You must make sure an effective two-way voice communication system is provided between the equipment operators and persons stationed within the building.[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050. WSR 15-23-086, § 296-870-60055, filed 11/17/15, effective 12/18/15. …

SummaryImportant:This section applies to permanent powered platform installations that meet either of the following:(1) Were completed after July 23, 1990;or(2) Have had major modifications done to an existing installation after July 23, 1990.Note:If the powered platform equipmen…

Important:This section applies to equipment which is part of a powered platform installation, such as platforms, stabilizing components, carriages, outriggers, davits, hoisting machines, wire ropes and electrical components.(1) You must make sure equipment installations are desig…

(1) You must make sure each carriage work station is identified by location markings or position indicators.(2) You must make sure means are provided to lock out the power supply for the carriage.(3) You must make sure safe access to and egress from the carriage is provided from …

(1) You must make sure roof carriage system stability is obtained by using gravity, attachment to a structural support, or a combination of gravity and structural attachment.(2) You must never use a material that can flow as a counterweight to achieve stability.(3) You must make …

(1) You must make sure carriages used to suspend powered platforms meet all of the following:(a) The horizontal movement of the carriage is controlled to permit it to be moved safely and to allow accurate positioning of the platform for vertical travel or storage;(b) Structural s…

(1) You must make sure transportable outriggers are only used when all of the following are met:(a) They are used with self-powered, ground-rigged working platforms;(b) The point of suspension is not higher than three hundred feet (91.5 m) above a safe surface;(c) A tie-in guide …

(1) You must make sure all davit installations are designed and installed to have a stability factor against overturning of not less than four.(2) You must make sure access to and egress from the working platform of roof rigged davit systems:(a) Is from a safe surface; and(b) Doe…

(1) You must make sure suspended or supported equipment is raised or lowered only by a hoisting machine.(2) You must make sure each hoisting machine is all of the following:(a) Powered only by air, electric, or hydraulic sources;(b) Capable of raising or lowering one hundred twen…

(1) You must make sure each suspended unit component is:(a) Capable of supporting, without failure, at least four times the maximum intended live load applied or transmitted to it; and(b) Constructed of materials that will withstand the anticipated weather conditions.EXEMPTION:Th…

(1) You must make sure each working platform of a suspended unit has a guardrail system on all sides that consists of a top guardrail, midrail, and a toeboard.(2) You must make sure the top guardrail is:(a) At least thirty-eight inches (950 mm) high; and(b) Able to withstand at l…

(1) You must make sure the width of the working platform is:(a) At least twenty-four inches (610 mm); and(b) Allows a minimum of a twelve-inch (305 mm) wide passage at or past any obstruction on the platform.(2) You must make sure the platform has slip-resistant flooring.(3) You …

(1) You must make sure a secondary wire rope suspension system which prevents the platform from falling if the primary means of support fails is provided on:(a) Working platforms that contain overhead structures which restrict emergency egress; and(b) Single-point suspended worki…

Important:In addition to these requirements, you also need to meet the requirements of both of the following sections in this chapter:1. Suspended working platforms and manned platforms used on supported equipment, WAC 296-870-70050;2. Working platform fall protection, WAC 296-87…

Important:In addition to these requirements, you also need to meet the requirements of both of the following sections in this chapter:1. Suspended working platforms and manned platforms used on supported equipment, WAC 296-870-70050;2. Working platform fall protection, WAC 296-87…

Important:In addition to these requirements, you also need to meet the requirements of both of the following sections in this chapter:1. Suspended working platforms and manned platforms used on supported equipment, WAC 296-870-70050;2. Working platform fall protection, WAC 296-87…

Important:In addition to these requirements, you also need to meet the requirements of both of the following sections in this chapter:1. Suspended working platforms and manned platforms used on supported equipment, WAC 296-870-70050;2. Working platform fall protection, WAC 296-87…

Important:Manned platforms used on supported equipment need to meet all the requirements, except the inboard to outboard roll limitation, of suspended working platforms and manned platforms used on supported equipment, WAC 296-870-60050.(1) You must make sure supported equipment …

(1) You must make sure each specific installation uses suspension wire ropes and connections or combination cable and connections meeting the specifications recommended by the hoisting machine manufacturer.(2) You must make sure connections are capable of developing at least eigh…

Reference:Unless otherwise specified in this chapter, make sure electrical wiring and equipment meet the requirements of Electrical, Part L in the General safety and health standards, chapter 296-24 WAC.(1) You must make sure electrical runway conductor systems are:(a) Designed f…

Adjustable suspension scaffold. A suspended scaffold equipped with one or more hoists that can be operated by employees on the scaffold.Bearer. A horizontal scaffold member (which may be supported by ledgers or runners) upon which the scaffold platform rests and which joins scaff…

This chapter applies to suspended and supported scaffolds, including their supporting structure and anchorage points.EXEMPTION:This chapter does not apply to: 1. Manually propelled elevating work platforms; 2. Self-propelled elevating work platforms; 3. Boom-supported elevating w…

Section contents:Your responsibility:To make sure all scaffolds meet these requirements.You must meet the requirements …in this section:Make sure scaffolds are properly designed and constructedWAC 296-874-20002Make sure scaffolds are erected, moved, altered, or dismantled by appr…

(1) You must make sure scaffolds are:(a) Designed by a qualified person; and(b) Constructed according to that design.(2) You must prohibit the use of shore and lean-to scaffolds.[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050. WSR 15-23-086, § 296-874-20002, filed 11/17…

You must make sure scaffolds are erected, moved, altered, or dismantled only when the work is:(1) Supervised and directed by a competent person qualified in scaffold erection, moving, dismantling, or alteration; and(2) Done by experienced and trained employees selected by the com…

(1) You must make sure intermixed scaffold components:(a) Fit together without force; and(b) Maintain the scaffold's structural integrity.(2) You must make sure a qualified person determines that modifying components in order to intermix them will result in a structurally sound s…

(1) You must fully plank or deck each platform between the front uprights and the guardrail supports on all working levels of a scaffold so that there is no more than one inch (2.5 cm):(a) Between adjacent units; and(b) Between the platform and the uprights.EXEMPTION:1. There may…

You must make sure scaffold platforms meet the minimum width requirements of Table 1, Minimum Platform Width.Table 1Minimum Platform WidthType of ScaffoldMinimum Platform Width RequiredLadder jack scaffoldPump jack scaffold12 inches (20 cm)Roof bracket scaffoldTop plate bracket s…

(1) You must make sure, when platforms are overlapped to create a longer platform, that:(a) The overlap is over a support;(b) The platforms are either:(i) Overlapped by at least twelve inches (30 cm); or(ii) Are nailed together or otherwise prevented from moving.(2) You must make…

You must do the following whenever platforms overlap to change direction:(1) First lay the platform that rests on a bearer at an angle other than a right angle; then(2) Lay the platform that is perpendicular to the bearer.[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050.…

(1) You must make sure each end of a platform:(a) Is cleated or restrained by hooks or equivalent means; or(b) Extends over the centerline of its support at least six inches (15 cm).(2) You must make sure the cantilevered portion of a platform meets at least one of the following:…

You must make sure a loaded platform does not sag more than one-sixtieth of the span.[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050. WSR 15-23-086, § 296-874-20018, filed 11/17/15, effective 12/18/15. Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060.…

(1) You must provide scaffold platforms more than two feet (0.6 m) above or below a point of access with at least one of the following means of access:(a) Portable, hook-on, or attachable ladder;(b) Stairway-type ladder;(c) Ladder stand;(d) Stair tower (scaffold stairway or tower…