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9.10.17.2.(1) | Application | Intent |
OS1 |
Objective | OS1 Fire Safety |
Attribution | |
Application | Application 1: Maximum surface flame-spread
rating on at least 90% of the exposed surface of:
This applies to buildings to
which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application
of Part 9].
Application 2: This also applies to:
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Intent | Intent 1: To exempt certain ceilings from the requirements of Sentence 9.10.17.1.(1), which would otherwise limit surface flame-spread rating
to 150, and require a lower maximum flame-spread rating on at least 90% of
the exposed ceiling surface, on the basis that the lower flame-spread rating
is needed in these locations [exits or public corridors that are a part of
a means of egress] to protect persons during evacuation. Intent 2: To limit the probability that certain finishes having an
inappropriately high flame-spread property will be used in exits or public
corridors that are a part of a means of egress, which could lead to the spread
of fire across the exposed surfaces of the finishes, which could lead to delays
in the evacuation or movement of persons to a safe place, which could lead
to harm to persons. |
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