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9.21.3.6.(2) | Application | Intent |
| OH1 | OS2 | OP1 | OS3 | OS1 |
| Objective | OS2 Structural Safety |
| Attribution | |
| Application | Application 1: Limitation on the use of metal flue liners
for 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, 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 metal liners will be installed
in appliances using fuels that are more likely to cause the accumulation of
creosote, which could lead to chimney fires, which could lead to the heat-induced
deformation and joint failure of metal flue liners, which could lead to the
ingress of condensed water vapour into the cavity between the chimney liner
and the surrounding masonry, which could lead to damage to 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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