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9.25.3.2.(2) | Application | Intent |
| OH1 | OS2 | OS1 | OS3 |
| Objective | OS1 Fire Safety |
| Attribution | |
| Application | Application 1: Polyethylene sheets used to provide airtightness in
required air barrier systems, in buildings to
which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application
of Part 9]. |
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| Intent | Intent 1: To limit the probability that the performance of polyethylene
sheets will fall significantly below expectations, which could lead to an
inability to resist loads induced by air pressure differences, which could
lead to the sheets rupturing or tearing at fasteners, or becoming prematurely
brittle, which could lead to the failure of the membrane. Where
the air barrier system separates a garage, or suite containing a garage, from
residential space, this is to limit the probability of a loss of airtightness,
which could lead to gas and fumes migrating from the garage into the remainder
of the building, which could lead to the accumulation of gas and fumes and
their subsequent ignition by a nearby ignition source, which could lead to
a fire or explosion, which could lead to harm to persons.
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