{"data":{"id":"us/46-cfr-170.255","jurisdiction":"us","citation":"46 CFR 170.255","heading":"Class 1 doors; permissible locations.","body":"(a) Except as provided in paragraphs (b) and (c) of this section, Class 1 doors within passenger, crew, and working spaces are permitted only above a deck, the molded line of which, at its lowest point at side, is at least 7 feet (2.14 meters) above the deepest load line.\n(b) Class 1 doors are permitted within passenger, crew, and working spaces, wherever located, if—\n(1) In the judgment of the OCMI, the door is in a location where it will be closed at all times except when actually in use; and\n(2) The vessel is less than 150 gross tons and will not proceed more than 20 nautical miles (37 kilometers) from shore; or\n(3) The vessel is in rivers or lakes, bays, and sounds service.\n(c) Class 1 doors are permitted in any location on a vessel that—\n(1) Is less than 100 gross tons; and\n(2) Will operate only in the offshore oil industry trade.\n(d) Quick-acting Class 1 doors are permitted in any location on a vessel that operates on the Great Lakes and is required to meet the damage stability standards of subpart H of part 172 of this chapter.\n(e) For vessels required to meet the damage stability standards of subpart H of this chapter, when Class 1 doors are installed below a deck the molded line of which at its lowest point at side is less than 7 feet (2.14 meters) above the deepest load line, an indicator light for each door which warns when the door is open must be installed on the bridge.","path":["Title 46—Shipping","CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY","SUBCHAPTER S—SUBDIVISION AND STABILITY","PART 170—STABILITY REQUIREMENTS FOR ALL INSPECTED VESSELS","Subpart H—Watertight Bulkhead Doors"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-46.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:22Z","sha256":"791e3765279d950eaef7c2158c85a7052382ec84b4e392a6af62ffadd18a7796","source_id":"us-cfr","stale":true,"prev":"us/46-cfr-170.250","next":"us/46-cfr-170.260"},"notice":"GroundRules: Original legal text. Not legal advice."}