46 C.F.R. § 108.160 Vertical ladders.
Title 46 - Shipping
(a) Each vertical ladder must have rungs that are— (1) At least 41 centimeters (16 inches) in length; (2) Not more than 30 centimeters (12 inches) apart, uniform for the length of the ladder; and (3) At least 18 centimeters (7 inches) from the nearest permanent object in back of the ladder. (b) Except when unavoidable obstructions are encountered, there must be at least 11.5 centimeters (4 (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. (d) No vertical fixed ladders may be made of wood. [CGD 73–251, 43 FR 56808, Dec. 4, 1978, as amended by USCG–2002–13058, 67 FR 61279, Sept. 30, 2002]
Title 46: Shipping
PART 108—DESIGN AND EQUIPMENT
Subpart B—Construction and Arrangement
Means of Escape
§ 108.160 Vertical ladders.
