46 C.F.R. §§ 108.131–108.147

Standard Fire Test means the test in which specimens of the relevant bulkheads or decks, having a surface of approximately 4.65 square meters (50 square feet) and a height of 2.44 meters (8 feet) resembling as closely as possible the intended construction and including, where appropriate, at least one joint, are exposed in a test furnace to a series of temperature relationships approximately as follows:

Equivalent material means a material that by itself or with insulation has smoke and fire retardant properties equal to that of the steel required for “A” or “B” class bulkheads or decks and has structural qualities equivalent to steel at the end of the applicable fire exposure.

Approved material means a material approved under one of the following subparts of Subchapter Q of this chapter:

Stairtower means a stairway that penetrates more than one deck within the same enclosure, or two or more stairways that—

Accommodation space— includes, sleeping, mess, hospital, recreational, toilet, washing and shower spaces, and corridors.

Machinery space;

Galley or combination galley and messroom;

Main pantry;

Classified space;

Each corridor bulkhead in an accommodation space must be an A class or B class bulkhead except if an A class bulkhead is specifically required by this part.

No door in a corridor bulkhead in an accommodation space may have a louver, except that a stateroom, lounge, or recreation room door may have louvers in its lower half.

Each stairtower, elevator, and dumbwaiter, and other trunk must be enclosed by A class bulkheads.

Each bulkhead not described under paragraph (a) of this section must be either A class, B class, or C class bulkheads.

At least one opening to each stairway must be enclosed by either A class or B class bulkheads and doors.

Each stairtower must have doors at all levels and each must be an A class door.

Interior stairs, including stringers and treads, must be made of steel or an equivalent material.

Except in washrooms and toilet spaces, each deck covering in an accommodation space must be made of an approved material, except an overlay on a deck for leveling or finishing that is not more than 9.375 millimeters ( 3/8 inch) thick.

Except as provided in paragraph (1), each ceiling, lining, insulation, and pipe and duct lagging in an accommodation space must be made of an approved material that is noncombustible.

Each sheathing, furring, or holding piece used to secure a bulkhead, ceiling, lining, or insulation in an accommodation space must be made of an approved material that is non-combustible.

No bulkhead, lining, or ceiling in an accommodation space may have a combustible veneer greater than 2 millimeters ( 1/12 inch) in thickness.

Each corridor or hidden space in an accommodation space may be covered by an approved interior finish or a reasonable number of coats of paint. However, no corridor or hidden space may have combustible veneer, trim, or decoration except material approved under Subpart 164.012 of this chapter.