46 CFR § 154.174 - Transverse contiguous hull structure.
---
identifier: "/us/cfr/t46/s154.174"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 154.174 - Transverse contiguous hull structure."
title_number: 46
title_name: "Shipping"
section_number: "154.174"
section_name: "Transverse contiguous hull structure."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "O"
subchapter_name: "CERTAIN BULK DANGEROUS CARGOES"
part_number: "154"
part_name: "SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "46 U.S.C. 3703, 9101; Department of Homeland Security Delegation No. 0170.1."
regulatory_source: "CGD 74-289, 44 FR 26009, May 3, 1979, unless otherwise noted."
cfr_part: "154"
---
# 154.174 Transverse contiguous hull structure.
(a) The transverse contiguous hull structure of a vessel having cargo containment systems without secondary barriers must meet the standards of the American Bureau of Shipping published in “Rules for Building and Classing Steel Vessels”, 1981.
(b) The transverse contiguous hull structure of a vessel having cargo containment systems with secondary barriers must be designed for a temperature that is:
(1) Colder than the calculated temperature of this hull structure when:
(i) The temperature of the secondary barrier is the design temperature, and
(ii) The ambient cold condition under § 154.176(b)(1)(ii) and (iii) are assumed; or
(2) Maintained by the heating system under § 154.178.
[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 77-069, 52 FR 31630, Aug. 21, 1987]