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Subchapter 4. Construction Safety Orders
Article 23. Suspended Scaffolds
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§1665. Interior Hung Scaffolds.

(a) An interior hung scaffold shall be hung or suspended from the roof structure or ceiling beams.

(b) The suspension rope shall be wrapped at least twice around the supporting members and twice around the ledgers of the scaffold, with each end of the wire rope secured by at least three standard wire-rope clips properly installed.

(c) For hanging wood scaffolds, the following minimum nominal size material shall be used:

(1) Supporting ledgers 2 x 10 inches on edge;

(2) Planking 2 x 10 inches, with maximum span 7 feet for heavy duty and 10 feet for light duty or medium duty.

(d) Steel tube and coupler members may be used for hanging scaffolds with both types of scaffold designed to sustain a uniform distributed working load up to heavy duty scaffold loads with a safety factor of four.

(e) When a hanging scaffold is supported by means of wire rope, it shall be attached with a thimble to a 1/2-inch shackle or bolt of not less than 1/2-inch diameter. The shackle shall be secured by means of a stop bolt 4 inches from the end of the beam or ledger. Wire rope shall not be wrapped around either member. See Plate C-2, Appendix.

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.


1. Renumbering and amendment of former Section 1663 to Section 1665 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).

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