46 CFR 108.455
§ 108.455 Enclosure openings.
United States · 46 CFR — Shipping · Status: effective
Cite this
- Citation
- 46 CFR 108.455, § 108.455 Enclosure openings, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/226815
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Full text
(a) Mechanical ventilation for spaces protected by a CO2 system must be designed to shut down automatically when the system is activated.
(b) Each space that is protected by a CO2 system and that has natural ventilation must have a means for closing that ventilation.
(c) Each space protected by a CO2 system must have the following means for closing the openings to the space from outside the space:
(1) Doors, shutters, or dampers for closing each opening in the lower portion of the space.
(2) Doors, shutters, dampers or temporary means such as canvas or other material normally on board a unit may be used for closing each opening in the upper portion of the space.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.