(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; and | |
2. 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. |