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9.21.5.1.(3) | Application | Intent |
OP1 | OS1 |
Objective | OS1 Fire Safety |
Attribution | |
Application | Application 1: Minimum clearance between rectangular masonry
or concrete chimneys that are not more than 12 m in height
and that serve fireplaces or appliances having
a combined total rated heat output of 120 kW or less, and combustible flooring and subflooring, in 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 rectangular masonry
or concrete chimneys, in buildings to which
Part 6 applies [see Sentence 1.3.3.2.(1) of Division A for application
of Part 6], as stated in Sentence 6.3.1.2.(1). |
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Intent | Intent 1: To limit the probability that an inadequate clearance will
lead to excessive heat conduction or radiation from masonry or concrete chimneys
(especially during chimney fires) to combustible flooring, which could lead
to the ignition of combustible building components, which could lead to harm
to persons. |
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