{"data":{"id":"us/46-cfr-32.56-60","jurisdiction":"us","citation":"46 CFR 32.56-60","heading":"-60 Ventilation ducts—T/ALL.","body":"(a) Each duct for ventilation of Category A machinery spaces that passes through accommodation, service, or control spaces must be:\n(1) Constructed of steel and insulated to “A-60” Class; or\n(2) Constructed of steel, fitted with an automatic fire damper at each boundary where it enters and leaves the Category A machinery space, and insulated to “A-60” Class for a distance of 5 meters (16.4 feet) beyond each machinery space boundary.\n(b) Each duct for ventilation of accommodation, service, and control spaces that passes through Category A machinery spaces must be constructed of steel and be fitted with an automatic fire damper at each Category A machinery space boundary.","path":["Title 46—Shipping","CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY","SUBCHAPTER D—TANK VESSELS","PART 32—SPECIAL EQUIPMENT, MACHINERY, AND HULL REQUIREMENTS","Subpart 32.56—Structural Fire Protection for Tank Ships With a Keel Laying Date On or After January 1, 1975"],"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":"19f089c159edd6c20927e01dcd06a79302acb9f91c76909d65be78f324844e5b","source_id":"us-cfr","stale":true,"prev":"us/46-cfr-32.56-55","next":"us/46-cfr-32.57-1"},"notice":"GroundRules: Original legal text. Not legal advice."}