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9.27.3.2.(1) | Application | Intent |
| OS2 | OH1 |
| Objective | OS2 Structural Safety |
| Attribution | |
| Application | Application 1: Wall sheathing membranes in cladding assemblies to
which Subsection 9.27.3. applies [see Article 9.27.1.1. for
application of Subsection 9.27.3.].
Exceptions:
except as stated in Sentence 9.27.2.1.(1), which applies where
it can be shown that precipitation ingress will not adversely affect occupant
health or safety.
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| Intent | Intent 1: To limit the probability that performance, with respect
to strength, airtightness, resistance to liquid-water transfer and water-vapour
permeance, will fall significantly below expectations. This
is to limit the probability of:
This is to limit the probability of the failure of required environmental
separation elements, which could lead to deterioration, which could lead to
compromised structural integrity of exterior walls, which could lead to harm
to persons.
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