46 C.F.R. § 32.56-30 Category A machinery spaces: Bulkheads and decks—T/ALL.
Title 46 - Shipping
(a) Bulkheads and decks that separate category A machinery spaces from cargo pumprooms must be “A” Class construction. (b) Bulkheads and decks that separate category A machinery spaces or cargo pumprooms, including the pumproom entrance, from accommodation, service, or control spaces must be “A-60” Class construction.
Title 46: Shipping
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
§ 32.56-30 Category A machinery spaces: Bulkheads and decks—T/ALL.

