Hull Construction Regulations

69 (1) Every air space enclosed behind a ceiling, panel or lining shall be divided by close fitting draught-stops spaced not more than 14 m apart in the fore and aft direction and shall be closed at each deck.

(2) Every ceiling, panel and lining referred to in subsection (1) shall be so constructed as to enable a fire patrol to detect any smoke originating in a concealed or inaccessible space, without impairing the efficiency of the fire protection of the ship.

(3) Small holes in the ceiling, panels and linings, protected by metal gauze, shall be deemed to fulfil the requirements of subsection (2).

(4) Cellulose-based film shall not be used in cinematograph installations on board ship.