7.2.1
Fire-resisting divisions are
those divisions formed by bulkheads and decks which comply with the
following:
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.1 They shall be constructed of non-combustible
or fire-restricting materials which by insulation or inherent fire-resisting
properties satisfy the requirements of 7.2.1.2 to 7.2.1.6.
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.2 They shall be suitably stiffened.
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.3 They shall be so constructed as to be capable
of preventing the passage of smoke and flame up to the end of the
appropriate fire protection time.
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.4 Where required they shall maintain load-carrying
capabilities up to the end of the appropriate fire protection time.
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.5 They shall have thermal properties such that
the average temperature on the unexposed side will not rise more than
140°C above the original temperature, nor will the temperature,
at any one point, including any joint, rise more than 180°C above
the original temperature during the appropriate fire protection time.
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.6 A test of a prototype bulkhead or deck in accordance
with the Fire Test Procedures Code shall be required to ensure that
it meets the above requirements.
7.2.2
Fire-restricting materials are
those materials which have properties complying with the Fire Test
Procedures Code.
7.2.3
Non-combustible material is
a material which neither burns nor gives off flammable vapours in
sufficient quantity for self-ignition when heated to approximately
750°C, this being determined in accordance with the Fire Test
Procedures Code.
7.2.4
A standard fire test is one
in which specimens of the relevant bulkheads, decks or other constructions
are exposed in a test furnace by a specified test method in accordance
with the Fire Test Procedures Code.
7.2.5 Where the words "steel or other equivalent
material" occur, equivalent material means any non-combustible
material which, by itself or due to insulation provided, has structural
and integrity properties equivalent to steel at the end of the applicable
exposure to the standard fire test (e.g. aluminium alloy with appropriate
insulation).
7.2.6
Low flame-spread means that
the surface thus described will adequately restrict the spread of
flame, this being determined in accordance with the Fire Test Procedures
Code.
7.2.7
Smoke-tight or capable
of preventing the passage of smoke means that a division made
of non-combustible or fire-restricting materials is capable of preventing
the passage of smoke.