{"data":{"id":"us/46-cfr-174.090","jurisdiction":"us","citation":"46 CFR 174.090","heading":"Permeability of spaces.","body":"When doing the calculations required in § 174.065—\n(a) The permeability of a floodable space, other than a machinery space, must be as listed in Table 174.090; and\n(b) Calculations in which a machinery space is treated as a floodable space must be based on an assumed machinery space permeability of 85%, unless the use of an assumed permeability of less than 85% is justified in detail.\nTable 174.090—Permeability\nSpaces and tanks Permeability (percent)\nStoreroom spaces 60.\nAccommodation spaces 95.\nVoids 95.\nConsumable liquid tanks 95 or 0. 1\nOther liquid tanks 95 or 0. 2\n1 Whichever results in the more disabling condition.\n2 If tanks are partially filled, the permeability must be determined from the actual density and amount of liquid carried.","path":["Title 46—Shipping","CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY","SUBCHAPTER S—SUBDIVISION AND STABILITY","PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES","Subpart C—Special Rules Pertaining to Mobile Offshore Drilling Units"],"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":"9a6234a31be8086bd22cbf635c4cb5e2116b2f8a31c049eaae5c7b8f06b8c577","source_id":"us-cfr","stale":true,"prev":"us/46-cfr-174.085","next":"us/46-cfr-174.100"},"notice":"GroundRules: Original legal text. Not legal advice."}