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9.10.13.8.(2)
OS1OP1
ObjectiveOS1 Fire Safety
Attribution
Application
Application 1: 
Maximum size of openings in interior fire separations, even where such openings are protected with closures, where the fire compartments on both sides of the fire separation are sprinklered.
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 limit the probability that large closures, which are permitted to have a lower fire resistance than the fire separations in which they are installed, will reduce the fire-resistance rating of the separations, which could lead to the spread of fire from one fire compartment to another, which could lead to harm to persons in the other fire compartment.
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