Code of Federal Regulations · Section
§ 108.159 — Stairways And Exterior Inclined Ladders
46 C.F.R. § 108.159
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Each stairway, except a stairway in a machinery or storage space, and each exterior inclined ladder must be at least 70 centimeters (28 inches) wide with an angle of inclination from the horizontal of not more than 50 degrees, except that special consideration may be given to the installation if a 70 centimeters (28 inch) width is impracticable.
Authorizing Statute
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Immersion suits46 U.S.C. § 3102
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Laws and regulations governing lands43 U.S.C. § 1333