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9.26.4.8.(1) | Application | Intent |
OH1 | OS2 | OS1 | OP1 | OS3 |
Objective | OS2 Structural Safety |
Attribution | |
Application | Application 1: Installation of saddles at junctions, more than 750
mm wide, of sloping roofs with the upper side of chimneys,
on 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 9.26.4.8.(5), which applies to
shingle roofs where the intersection between the chimney and
roof is protected by sheet metal flashing that meets certain criteria.
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Intent | Intent 1: To limit the probability that the flow of water down a roof's
surface will be interrupted by a wide chimney, which could lead to a temporary
increase in water depth beyond the depth protected by roofing or by the vertical
leg of flashing at the chimney, which could lead to precipitation or meltwater
ingress, which could lead to deterioration, which could lead to the structural
failure of roofs or chimneys, or elements protected by such assemblies, which
could lead to harm to persons. |
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