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3.1.5.17.(1)
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Application
Application 1: 
Combustible plumbing fixtures, including wall and ceiling enclosures that form part of plumbing fixtures, in buildings described in Sentence 1.3.3.2.(1) of Division A that are required to be of noncombustible construction, where such fixtures are constructed of material having a flame-spread rating and smoke developed classification not more than that permitted for the wall surface of the room or space in which they are installed.
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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