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3.1.5.5.(3)
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Application
Application 1: 
Maximum heat flux during the flame exposure on an exterior non-loadbearing wall assembly that includes combustible components, when the assembly is subjected to testing in conformance with CAN/ULC-S134, “Standard Method of Fire Test of Exterior Wall Assemblies,” on buildings described in Sentence 1.3.3.2.(1) of Division A that are required to be of noncombustible construction, and where:
  • the building is not more than 3 storeys in building height, or is sprinklered throughout, and
  • the interior surfaces of the wall assembly are protected by a thermal barrier conforming to Sentence 3.1.5.12.(3).
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.
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