Ledgers shall project not more than 3 feet 6 inches from the outside wall line and shall be substantially braced and secured to prevent tipping or turning. The outrigger ledger shall consist of 2 pieces of 1-inch by 6-inch or heavier material nailed on opposite sides of the vertical and angle braces. (See Plate B-22, Appendix.) Figure Four or light outrigger frames shall be spaced not more than 10 feet apart, and shall be constructed as follows from sound lumber: (b) Figure Four or Light Outrigger Scaffolds. (3) Where additional working levels are required to be supported by the outrigger method, the plans and specifications of the outrigger and scaffolding structure shall be prepared by a Civil Engineer currently registered in California. One member shall be fastened in a flat position on top of the posts and the other member shall be fastened in an edge-up position to the inside of the posts and at the side of the top rail.Īdditional protection in the form of screen enclosing the opening between rail and toeboard shall be provided if material on the scaffold is piled higher than the toeboard. The top rail shall consist of double 2-inch by 4-inch members. Every outrigger scaffold 7 1/2 feet or more in height shall be provided with a railing and toeboard. The ends of the planks shall not project more than 18 inches beyond the outrigger, and not less than 6 inches, unless they are nailed in place. Planking shall be nailed or bolted or otherwise secured to outriggers. The platforms shall consist of planks, at least 2 inches by 10 inches, covering the full width of the projection. For single scaffolds, consisting of a platform between 2 beams, the outrigger beams may have a smaller cross section, but not less than 3 inches by 12 inches. (2) On continuous scaffolds, where the beams may receive load from work platforms on each side, such beams shall not be less than 3 inches by 16 inches in cross section. The fulcrum point of the beam shall rest on a secure bearing at least 6 inches square. The inboard end of outrigger beams, measured from the fulcrum point to anchorage point, shall not be less than 1 1/2 times the outboard end in length. Those of the following sizes shall not project more than 6 feet beyond the outer support shall be securely anchored and braced to prevent tipping or turning and shall be spaced at centers of 7 feet 6 inches, or closer. (1) Outrigger beams of outrigger scaffolds for use by bricklayers, stonemasons, or other heavy trades shall be made of "selected lumber," or better.
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