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9.10.16.2.(2)
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Application
Application 1: 
Fire stops described in Sentence 9.10.16.2.(1) [fire stopping of concealed spaces within wall assemblies, including spaces created by furring, at various locations], where:
  • the width of the concealed wall space does not exceed 25 mm,
  • the exposed construction materials within the space are noncombustible,
  • the exposed construction materials within the space, including insulation, but not including wiring, piping or similar services, have a flame-spread rating of not more than 25, or
  • the concealed wall space is filled with insulation.
This applies to 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 exempt wall spaces from the application of Sentence 9.10.16.2.(1), which would otherwise require fire stopping, if certain conditions are met, on the basis that the conditions provide an equivalent level of protection, which limits the probability that fire will spread from a concealed wall space to or through another concealed wall space.
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