108.160—Vertical ladders.
(b)
Except when unavoidable obstructions are encountered, there must be at least 11.5 centimeters (4 1/2 inches) clearance above each rung.
(c)
Except as provided in § 108.540(h)(3)(ii), each exterior vertical ladder more than 6 meters (20 ft.) in length must be fitted with a cage or ladder safety device meeting ANSI Standard 14.3 (1974) for fixed ladders.
[CGD 73-251, 43 FR 56808, Dec. 4, 1978, as amended by USCG-2002-13058, 67 FR 61279, Sept. 30, 2002]