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9.22.5.2.(1) | Application | Intent |
| OS1 | OS2 | OP1 |
| Objective | OS1 Fire Safety |
| Attribution | |
| Application | Application 1: Support of fire chamber floors and hearths for masonry
fireplaces constructed on-site, in 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 9.22.5.2.(2), which applies to
hearths for fireplaces with an opening raised not less than 200 mm from
a combustible floor.
Application 2: This also applies to fireplaces 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 6.2.1.5.(1). |
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| Intent | Intent 1: To limit the probability that an insufficient mass of concrete
will lead to excessive heat transfer by conduction through the fire chamber
floor or by radiation from the fireplace opening, which could lead to the
ignition of combustible building components, which could lead to harm to persons.
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