5.1.1 The caissons,
pontoons, wing walls, super structures, bulkheads, decks and deckhouses
are to be of steel or other material which, by itself or due to insulation
provided, has structural and fire integrity properties equivalent
to steel.
5.1.2 Pipes
conveying oil or combustible liquids are to be of approved material
having regard to the fire-risk. Materials readily rendered ineffective
by heat are not to be used for overboard scuppers, sanitary discharges
and other outlets which are close to the waterline and where the failure
of the material in the event of fire would give rise to dangers of
flooding.
5.1.3 All internal
bulkheads, ceilings and linings shall be constructed of non-combustible
materials. Corridor bulkheads shall be constructed of steel or to
‘B’ Class standards. All exposed surfaces in corridors
and stair-way enclosures and surfaces in concealed or inaccessible
spaces should have low flame-spread characteristics. Bulkheads, linings
and ceilings may have combustible veneer, provided that such veneer
should not exceed 2,0 mm within any such space except corridors, stairway
enclosures and control stations, where it should not exceed 1,5 mm.
Paints, varnishes and other finishes used on exposed interior surfaces
should not be of a nature to offer an undue fire hazard. Bulkheads
of galley, paint stores, lamp rooms and other compartments containing
materials which would constitute a similar fire hazard are to be of
steel or equivalent material. Deck coverings within accommodation
spaces on the decks forming the crown of machinery spaces are to be
of a type which will not readily ignite.