The accommodation and service spaces shall be protected in accordance with the provisions of either paragraph (a) or (b) of this Regulation.
| (i) | Within the accommodation spaces, all enclosure bulkheads other than those required to be of “A” Class divisions, shall be constructed of “B” Class divisions of noncombustible materials, which may, however, be faced with combustible materials in accordance with subparagraph (iii) of this paragraph. |
| (ii) | All corridor bulkheads shall extend from deck to deck. Ventilation openings may be permitted in the doors in “B” Class bulkheads, preferably in the lower portion. All other enclosure bulkheads shall extend from deck to deck vertically, and to the shell or other boundaries transversely, unless noncombustible ceilings or linings such as will ensure fire integrity are fitted, in which case the bulkheads may terminate at the ceilings or linings. |
| (iii) | Except in cargo spaces, mail rooms, baggage rooms, or refrigerated compartments of service spaces, all linings, grounds, ceilings and insulations shall be of noncombustible materials. The total volume of combustible facings, mouldings, decorations and veneers in any accommodation or public space shall not exceed a volume equivalent to 2,54 millimetres (1/10 inch) veneer on the combined area of the walls and ceilings. All exposed surfaces in corridors or stairway enclosures and in concealed or inaccessible spaces shall have low flamespread characteristics. |
| (i) | All corridor bulkheads in accommodation spaces shall be of steel or be constructed of “B” Class panels. |
| (ii) | A fire detecting system of an approved type shall be installed and so arranged as to detect the presence of fire in all enclosed spaces appropriated to the use or service of passengers or crew (except spaces which afford no substantial fire hazard) and automatically to indicate at one or more points or stations where it can be most quickly observed by officers and crew, the presence or indication of fire and also its location. |
