CFR > Title 46 - Shipping > CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY > SUBCHAPTER D—TANK VESSELS (parts 30 to 39) > 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 (§32.56-1 to §32.56-60) > 32.56-20—Insulation of exterior boundaries: Superstructures and deckhouses—T/ALL.

32.56-20—Insulation of exterior boundaries: Superstructures and deckhouses—T/ALL.

The following exterior boundaries of superstructures and deckhouses that contain accommodation, service, and control spaces, except wheelhouses, must be insulated to “A-60” Class:
(a) The exterior boundaries that face the cargo area.
(b) The portion of the exterior bulkheads and decks within 3 meters (10 feet) of these boundaries.