[Code of Federal Regulations] [Title 46, Volume 4] [Revised as of October 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 46CFR108.131] [Page 123] TITLE 46_SHIPPING (This book contains parts 90 to 139) CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PART 108_DESIGN AND EQUIPMENT--Table of Contents Subpart B_Construction and Arrangement Sec. 108.131 Definitions. (a) 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: (1) At the end of 5 minutes--538[deg]C. (1,000[deg]F.) (2) At the end of 10 minutes--704[deg]C. (1,300[deg]F.) (3) At the end of 30 minutes--843[deg]C. (1,550[deg]F.) (4) At the end of 60 minutes--927[deg]C. (1,700[deg]F.). (b) Bulkheads and decks are defined and classed as follows: (1) A class bulkhead or deck means a bulkhead or deck that-- (i) Is made of steel or other equivalent material; and (ii) Prevents the passage of flame and smoke for 60 minutes if subjected to the standard fire test. (2) A 60 bulkhead or deck means an A class bulkhead or deck that-- (i) Is insulated with approved insulation, bulkhead panels, or deck covering; (ii) If subjected to the standard fire test for 60 minutes, has an average temperature rise on the unexposed side of the insulated bulkhead or deck of less than 139[deg]C. (250[deg]F.) above the temperature before the standard fire test and has a temperature rise at any point on the unexposed surface, including any joint, of less than 180[deg]C. (325[deg]F.) above the temperature before the standard fire test. (3) B class bulkhead or deck means a bulkhead or deck that-- (i) Is made of approved noncombustible material; (ii) Prevents flame from passing through it for 30 minutes if subjected to the standard fire test. (4) C class bulkhead or deck means a bulkhead or deck made of approved noncombustible material. (c) 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. (d) Approved material means a material approved under one of the following subparts of Subchapter Q of this chapter: (1) Deck coverings, Subpart 164.006. (2) Structural insulation, Subpart 164.007. (3) Bulkhead panel, Subpart 164.008. (4) Noncombustible materials, Subpart 164.009; (5) Interior finishes, Subpart 164.012. (e) Stairtower means a stairway that penetrates more than one deck within the same enclosure, or two or more stairways that-- (1) Are arranged vertically one above the other; or (2) Penetrate both the deck and the overhead within the same enclosure. (f) Accommodation space includes, sleeping, mess, hospital, recreational, toilet, washing and shower spaces, and corridors.