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9.21.4.10.(1) | Application | Intent |
| OS2 |
| Objective | OS2 Structural Safety |
| Attribution | |
| Application | Application 1: Junctions of 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, with adjacent
materials, 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 the ingress of precipitation
or melting snow will lead to the premature failure of exterior finishes, structural
wood elements or interior finishes, which could lead to the collapse of these
building elements, which could lead to harm to persons. Intent 2: To limit the probability that water from rain or melting
snow will enter the chimney, which could lead to the structural failure of
the masonry due to freeze-thaw stresses, which could lead to the collapse
of the chimney, which could lead to harm to persons. |
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