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(a) A-frames, towers, and masts shall be of design and construction that provides adequate structural strength, and of sufficient vertical clearance or height for positive control of material or loads.
(b) The apex and base of A-frames and similar devices shall be secured to prevent displacement.
(c) The A-frame shall be guyed with two back guys and one front guy or snap line. In lieu of a snap line, a back stiff leg may be used.
(d) Where mobile A-frames, towers, masts, or similar devices are used, all rigging on such devices shall be inspected; worn or defective parts shall be replaced or repaired before the devices are raised or used on each respective setting.
(e) Rigging shall conform to the requirements of Article 7.
NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
1. Editorial correction of subsection (e) filed 3-11-81 (Register 81, No. 11).
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