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3.1.8.7.(1)
OS1OP1
ObjectiveOS1 Fire Safety
Attribution
Application
Application 1: 
Ducts that penetrate assemblies required to be fire separations, in buildings described in Sentence 1.3.3.2.(1) of Division A.
Exceptions: 
except as permitted by Article 3.1.8.8., which waives the requirement for fire dampers in certain situations.
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Intent
Intent 1: 
To limit the probability that fire will spread from one fire compartment to another fire compartment through openings in a fire separation, which could lead to harm to persons in the other fire compartment.
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