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3.1.8.9.(1)
OS1OP1
ObjectiveOS1 Fire Safety
Attribution
Application
Application 1: 
Closing of fire dampers.
This applies to buildings described in Sentence 1.3.3.2.(1) of Division A, and to buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9]as stated in Sentence 9.10.13.13.(1).
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Intent
Intent 1: 
To limit the probability that a fire damper will not close when activated by fire conditions, which could lead to the spread of fire from one fire compartment to another fire compartment through openings in the fire separation between the fire compartments, which could lead to harm to persons in the other fire compartment.
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