Hooks shall be kept clean at all times.Įach hook shall be tied back to a substantial object on the roof with at least a 3/4-inch diameter Manila rope or equivalent. The ring should be fitted through a hole in the hook not more than 5 inches from the hook point. All hooks shall be provided with rings for tie-back service. The expected load per hook in service shall include its share (normally half) of the total scaffold and rigging weight plus the total weight of employees and movable tools or equipment, which shall never be considered as less than 500 pounds. Each hook shall, if loaded to point of failure, be capable of supporting a load 4 times that to which it will be subjected in service. (h) Hooks supporting scaffolds or stagings shall be made of mild steel (reinforcing steel shall not be used), free from flaws or other imperfections. In order to keep the lanyard continuously attached, with a minimum of slack, to a fixed structure, the attachment point of the lanyard shall be appropriately changed as the work progresses. Lanyards shall be securely attached to substantial members of the structure (not scaffold), or to securely rigged lines, which will safely suspend the employee in case of a fall. (g) Each employee shall be provided with and use personal fall protection in accordance with the requirements of Article 24. (2) Light metal-type platforms shall be approved. Patforms placed in service on or before Apshall comply with ANSI A10-1977, Safety Requirementsfor or before Apshall comply with ANSI A10.8-1977, Safety Requirements for Scaffolding, which is hereby incorporated by reference. (1) Platforms placed in service after Apshall Comply with the American National Standard (ANSI)Scaffolding-Safety Requirements A10.8-1988, which is hereby incorporated by reference. (f) Ladder-Type and Needle Beam-Type Platforms. A bar or other effective means shall be securely fastened at each end of the platform to prevent it from slipping off the hanger. The platform shall not extend beyond the hangers more than 18 inches. The span between hangers or falls when being used with patented-type planks shall not exceed the manufacturer's specifications. (e) The span between hangers or falls shall not be more than 10 feet when the planks are composed of two 2-inch by 10-inch planks or more than 12 feet when composed of two 2-inch by 12-inch planks as permitted in Subsection 1660 (d). Maximum platform width shall be 36 inches. Where platforms are composed of two 2-inch by 10-inch or two 2-inch by 12-inch dressed planks, side by side, they shall be firmly cleated together so as to act as a unit. Planks of dressed 2-inch lumber shall consist of "structural plank" free from damage affecting its strength. (d) Scaffold platforms shall be at least 14 inches wide. An iron or steel bolt 6 inches long and 3/4 inch in diameter shall be fastened through wooden bolsters at right angles to same not nearer than 3 inches to the end to prevent sling from accidentally slipping off the end of bolster. (c) Bolsters shall be 2-inch by 4-inch "selected lumber," or stronger material, placed so that the 4-inch sides are vertical. The top loop shall have a galvanized thimble fastened in place with a clip. ![]() Loops in wire rope slings for the use of bolsters shall be spliced. (b) Stirrups or slings shall be made of wire rope of at least 9,000 pounds breaking strength, or of solid round or square mild steel (reinforcing steel shall not be used) not less than 3/4 inch dimension, forged or welded into one piece. (See Plates B-24, B-26, B-26-a and B-27-a, Appendix).ĮXCEPTION: Single, power-driven units described in Section 1667. (a) Only one employee for each fall or hanger shall be allowed on this type of suspended scaffold. Suspended Scaffolds for Loads of 425 Pounds or Less.
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