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3.1.14.2.(2)
ApplicationIntent
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Application
Application 1: 
Fire spread test criteria for a metal roof deck assembly where:
  • the combustible material above the roof deck is protected by not less than 12.7 mm thick gypsum board, mechanically fastened to a supporting assembly if located beneath the roof deck, or by a thermal barrier conforming to one of Clauses 3.1.5.12.(2)(c) to (e) that is located:
    • on the underside of the combustible material, or
    • beneath the roof deck,
  • the building is sprinklered throughout, or
  • the roof assembly has a fire-resistance rating not less than 45 min.
This applies to buildings described in Sentence 1.3.3.2.(1) of Division A.
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Intent
Intent 1: 
To exempt metal roof deck assemblies from the application of Sentence 3.1.14.2.(1), which would otherwise require the assemblies to be fire tested, if certain conditions are met, on the basis that the assemblies will not significantly contribute to the spread of fire.
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