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9.10.17.3.(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 walls in exits.
This applies to buildings to which Part
9 applies [see Sentence 1.3.3.3.(1) of Division A for application of
Part 9].
Exceptions:
except as stated in Sentence 9.10.17.3.(2), which applies to
lobbies used as exits.
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Intent | Intent 1: To exempt certain walls 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 wall surface, on the basis that the lower flame-spread rating
is needed in exits 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, 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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