(1) The hull, superstructure, structural bulkheads,
decks and deckhouses shall be constructed of non-combustible materials
The Administration may permit combustible construction provided the
requirements of this regulation and the additional fire-extinguishing
requirements of regulation 40(3) are
complied with.
(2)
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(a) In vessels, the hull of which is constructed
of non-combustible materials, the decks and bulkheads separating machinery
spaces of category A from accommodation spaces, service spaces or
control stations shall be constructed to "A-60" class standard where
the machinery space of category A is not provided with a fixed fire-extinguishing
system and to "A-30" class standard where such a system is fitted.
Decks and bulkheads separating other machinery spaces from accommodation,
service spaces and control stations shall be constructed to "A-0"
class standard. Decks and bulkheads separating control stations from
accommodation and service spaces shall be constructed to "A" class
standard, insulated to the satisfaction of the Administration, except
that an Administration may permit the fitting of "B-15" class divisions
for separating such spaces as skipper's cabin from the wheelhouse.
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(b) In vessels, the hull of which is constructed
of combustible materials, the decks and bulkheads separating machinery
spaces from accommodation spaces, service spaces or control stations
shall be constructed to "F" class or "B-15" class standard. In addition,
machinery space boundaries shall as far as practicable prevent the
passage of smoke. Decks and bulkheads separating control stations
from accommodation and service spaces shall be constructed to "F"
class standard.
(3)
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(a) In vessels, the hull of which is constructed
of non-combustible materials, bulkheads of corridors serving accommodation
spaces, service spaces and control stations shall be of "B-15" class
divisions.
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(b) In vessels, the hull of which is constructed
of combustible materials, bulkheads of corridors serving accommodation
spaces, service spaces and control stations shall be of "F" class
divisions.
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(c) Any bulkhead required by subparagraph (a)
or (b) shall extend from deck to deck unless a continuous ceiling
of the same class as the bulkhead is fitted on both sides of the bulkhead,
in which case the bulkhead may terminate at the continuous ceiling.
(4) Interior stairways serving accommodation spaces,
service spaces or control stations shall be of steel or other equivalent
material. Such stairways shall be within enclosures constructed of
"F" class divisions in vessels the hull of which is constructed of
combustible materials, or "B-15" class divisions in vessels the hull
of which is constructed of non-combustible materials, provided that
where a stairway penetrates only one deck it need be enclosed at one
level only.
(5) Doors and other closures of openings in bulkheads
and decks referred to in paragraphs (2) and (3), doors fitted to stairway
enclosures referred to in paragraph (4) and doors fitted in engine
and boiler casings, shall be as far as practicable equivalent in resisting
fire to the divisions in which they are fitted. Doors to machinery
spaces of category A shall be self-closing.
(6) Lift trunks which pass through the accommodation
and service spaces shall be constructed of steel or equivalent material
and shall be provided with means of closing which will permit control
of draught and smoke.
(7)
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(a) In vessels, the hull of which is constructed
of combustible materials, the boundary bulkheads and decks of spaces
containing any emergency source of power and bulkheads and decks between
galleys, paint rooms, lamp rooms or any store-rooms which contain
appreciable quantities of highly flammable materials, and accommodation
spaces, service spaces or control stations shall be constructed of
"F" class or "B-15" class divisions.
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(b) In vessels, the hull of which is constructed
of non-combustible materials, the decks and bulkheads referred to
in subparagraph (a) shall be "A" class divisions insulated to the
satisfaction of the Administration, having in mind the risk of fire,
except that the Administration may accept "B-15" class divisions between
a galley and accommodation spaces, service spaces and control stations
when the galley contains electrically heated furnaces, electrically
heated hot water appliances or other electrically heated appliances
only.
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(c) Highly flammable products shall be carried
in suitably sealed containers.
(8) Where bulkheads or decks required by paragraphs
(2), (3), (5) or (7) to be of "A" class, "B" class or "F" class divisions,
are penetrated for the passage of electrical cables, pipes, trunks,
ducts, etc., arrangements shall be made to ensure that the fire integrity
of the division is not impaired.
(9) Air spaces enclosed behind ceilings, panellings
or linings in accommodation spaces, service spaces and control stations
shall be divided by close-fitting draught stops spaced not more than
7 m apart.
(10) Windows and skylights to machinery spaces
shall be as follows:
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(a) where skylights can be opened they shall be
capable of being closed from outside the space. Skylights containing
glass panels shall be fitted with external shutters of steel or other
equivalent material permanently attached;
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(b) glass or similar materials shall not be fitted
in machinery space boundaries. This does not preclude the use of wire-reinforced
glass for skylights and glass in control rooms within the machinery
spaces; and
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(c) in skylights referred to in subparagraph (a)
wire-reinforced glass shall be used.
(11) Insulating materials in accommodation spaces,
service spaces except domestic refrigerating compartments, control
stations and machinery spaces shall be non-combustible. The surface
of insulation fitted on the internal boundaries of machinery spaces
of category A shall be impervious to oil or oil vapours.
(12) Within compartments used for stowage of fish,
combustible insulation shall be protected by close-fitting cladding.
(13) Notwithstanding the requirements of this
regulation, the Administration may accept "A-O" class divisions in
lieu of "B-l5" or "F" class divisions, having regard to the amount
of combustible materials used in adjacent spaces.