§ 6.20. Roofing brackets and scaffolds.
(a) Bracket supports. Roofing brackets used for shingling and roofing shall be securely supported by means of ropes fastened to a hook securely hooked over the ridgepole of the roof, and to a 5/8 inch eye bolt securely screwed into the roofing bracket, or by means of pointed projectors driven their full length in the frame or woodwork of the roof.
(b) Ropes. The ropes may also be secured to some permanent part of the roof, such as the chimney or cupola, or to some solidly fixed object on the farther side of the building; or by 5/8 inch eye bolts, solidly screwed into sound, heavy timber. Ropes shall conform to the requirements set forth in § 6.31 (relating to cables, ropes, block and tackle).
(c) Horizontal scantling. Where horizontal scantling with shingles nailed to it is used, the scantling shall be at least 2 inches by 4 inches in cross section, and the shingles shall be securely nailed to the roof. Where the scantling is fastened to the roof by means of strips of sheet zinc or other material being nailed to the under sides of the scantling and to the roof, the nails used shall be of ample length and sufficient in number to insure safe working conditions.
(d) Protection. When work is done on roofs where there is no parapet wall at the eaves, and such roof has a slope greater than 6 inches in 1 foot, a substantial catch platform or scaffold platform is required of sufficient width to extend at least 2 feet beyond the outer edge of the eaves projection, and such platform should be equipped with a guardrail. As an alternative to such a platform, each man working on the roof should be provided with a lifeline securely fastened to a safe anchorage.
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