46 CFR 45.145
§ 45.145 Hatchway covers.
United States · 46 CFR — Shipping · Status: effective
Cite this
- Citation
- 46 CFR 45.145, § 45.145 Hatchway covers, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/224805
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Full text
(a) Hatchways in position 1 and 2 must have weathertight hatch covers with gaskets and clamping devices.
(b) The maximum ultimate strength of the hatchway cover material must be at least 4.25 times the maximum stress in the structure calculated with the following assumed loads:
(1) For ships 350 ft or more in length, at least 250 lb/ft 2 in position 1 and 200 lb/ft 2 in position 2.
(2) For ships less than 350 ft in length, at least AL in the following formula:
(i) Position 1:
(ii) Position 2:
(c) Hatchway covers must be so designed as to limit the deflection to not more than 0.0028 times the span under the loads described in paragraph (b) of this section and the thickness of mild steel plating forming the tops of covers must be at least 1 percent of the spacing of stiffeners or 0.24 in, whichever is greater.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.