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9.21.5.1.(1) | Application | Intent |
| OP1 | OS1 |
| Objective | OP1 Fire Protection of the Building |
| Attribution | |
| Application | Application 1: 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 framing, 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 excessive heat transfer, by
conduction or radiation, from masonry or concrete chimneys (especially during
chimney fires) will lead to the ignition of combustible building components,
which could lead to damage to the building. |
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