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Washington Administrative Code (Last Updated: November 23, 2016) |
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Title 296. Labor and Industries, Department of |
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Chapter 296-874. Scaffolds. |
Section 296-874-30004. Make sure suspended scaffold outrigger beams meet these requirements.
Latest version.
- (1) You must make sure outrigger beams are made of structural metal or equivalent strength material.(2) You must stabilize the inboard ends of outrigger beams by using either:(a) Bolts or other direct connections to the floor or roof deck; or(b) Counterweights and tiebacks.EXEMPTION:Masons' multipoint adjustable scaffold outrigger beams cannot be stabilized by counterweights.(3) You must make sure, before the scaffold is used, that a competent person:(a) Evaluates the direct connections; and(b) Confirms that the supporting surfaces can support the loads placed on them.(4) You must make sure suspended scaffold outrigger beams are all of the following:(a) Restrained to prevent moving;(b) Provided with stop bolts or shackles at both ends;(c) Securely fastened together with the flanges turned out when channel iron beams are used in place of I-beams;(d) Set and maintained with the web in a vertical position;(e) Placed so the suspension rope is centered over the stirrup.(5) You must place outrigger beams at a right angle (perpendicular) to their bearing support.EXEMPTION:Outrigger beams can be placed at other than a right angle (perpendicular) if:1. You can demonstrate that immovable obstructions make it impossible to place the beams at a right angle (perpendicular) to their bearing support; and2. Opposing angle tiebacks are used.Note:The angle between the outrigger beam and the bearing support is usually the same as the angle between the outrigger beam and the face of the building or structure.