Code of Federal Regulations · Section
§ 153.254 — Cargo Tank Access
46 C.F.R. § 153.254
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(a) A cargo tank must have at least one covered manhole opening into the vapor space described in § 153.354.
(b) An access through a vertical cargo tank surface must be at least 60 cm by 80 cm (approx. 23.6 × 31.5 in.) and no more than 60 cm above a foothold grating, or surface on both sides of the access way.
(c) An access through a horizontal cargo tank surface must be at least 60 cm by 60 cm (approx. 23.6 × 23.6 in.).
(d) An access trunk must be no less than 76 cm (approx. 29.9 in.) in diameter.
Authorizing Statute
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Administration and enforcement33 U.S.C. § 1903
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General regulatory authority49 U.S.C. § 5103
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Regulations46 U.S.C. § 3703