46 C.F.R. § 28.385 Structural fire protection for vessels that operate with more than 49 individuals on board.
Title 46 - Shipping
(a) Applicability. Each vessel that operates with more than 49 individuals on board must comply with the requirements of this section in addition to the requirements of §28.380. (b) Construction. The hull, structural bulkheads, columns and stanchions must be composed of steel. Superstructures and deckhouses must be constructed of noncombustible material. (c) Protection of accommodation spaces. A bulkhead or deck separating an accommodation space from a control station, machinery space, cargo space, or service space must be constructed of noncombustible material. [CGD 88–079, 56 FR 40393, Aug. 14, 1991; 56 FR 49822, Oct. 1, 1991]
Title 46: Shipping
PART 28—REQUIREMENTS FOR COMMERCIAL FISHING INDUSTRY VESSELS
Subpart D—Requirements for Vessels Which Have Their Keel Laid or Are at a Similar Stage of Construction on or After or Which Undergo a Major Conversion Completed on or After September 15, 1991, and That Operate With More Than 16 Individuals on Board
§ 28.385 Structural fire protection for vessels that operate with more than 49 individuals on board.

