§178.255-4. Closures for manholes and domes.
49 C.F.R. § 178.255-4
The manhole cover shall be designed to provide a secure closure of the manhole. All covers, not hinged to the tanks, shall be attached to the outside of the dome by at least 1/8 inch chain or its equivalent. Closures shall be made tight against leakage of vapor and liquid by use of gaskets of suitable material.
[Reserved]
Notes, amendments, and revision history
Source
Source: 29 FR 18972, Dec. 29, 1964, unless otherwise noted. Redesignated at 32 FR 5606, Apr. 5, 1967.
Authority
Authority: 49 U.S.C. 5101-5128; 49 CFR 1.81 and 1.97.