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3.1.5.12.(1)
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Application
Application 1: 
Combustible insulation, other than foamed plastics, in buildings described in Sentence 1.3.3.2.(1) of Division A that are required to be of noncombustible construction, where the insulation:
  • has a flame-spread rating not more than 25 on any exposed surface, or any surface that would be exposed by cutting through the material in any direction, and
  • is not protected as described in Sentences 3.1.5.12.(3) and (4).
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).
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Intent
Intent 1: 
To exempt certain combustible materials from the application of Sentence 3.1.5.1.(1) if certain conditions are met, on the basis that the materials are deemed to insignificantly contribute to fire growth and spread.
Intent 2: 
To direct Code users to Sentences 3.1.5.12.(3) and (4).
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