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3.1.5.12.(4) | Application | Intent |
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| Application | Application 1: Thermal barrier protection of combustible insulation
from adjacent space in a building, other than adjacent
concealed spaces within wall assemblies, and where the insulation has a flame-spread rating more than 25 but not more than
500 on any exposed surface, or any surface that would be exposed by cutting
through the material in any direction. This applies
to interior walls, within ceilings and within roof assemblies, of buildings described
in Sentence 1.3.3.2.(1) of Division A that are required to be of noncombustible construction, except buildings that:
Application 2: This also applies to buildings to
which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application
of Part 9] that are required to be of noncombustible
construction, as stated in Sentence 9.10.6.1.(1).
Exceptions:
except as stated in Sentence 3.1.5.12.(6), which applies to
thermosetting foamed plastic insulation having a flame-spread
rating not more than 500 that forms part of a factory-assembled exterior
wall panel that does not incorporate an air space.
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| Intent | Intent 1: To expand the application of Sentence 3.1.5.12.(2).
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