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3.1.8.10.(1)
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Application
Application 1: 
Door assemblies having a fire-protection rating not less than 20 min and used as closures in fire separations not required to have a fire-resistance rating more than:
This applies to buildings described in Sentence 1.3.3.2.(1) of Division A.
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Intent
Intent 1: 
To exempt certain door assemblies from the application of Sentence 3.1.8.4.(2) if certain conditions are met, on the basis that the door assemblies are deemed to provide sufficient protection against the spread of fire.
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