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9.9.4.2.(3)
OS1
ObjectiveOS1 Fire Safety
Attribution
Application
Application 1: 
Fire separations that are common to 2 exits, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
Exceptions: 
except:
  • for exits that serve not more than one dwelling unit, as stated in Sentence 9.9.4.1.(1), and
  • as stated in Sentence 9.9.4.4.(1), which applies to openings near unenclosed exit stairs and ramps.
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Intent
Intent 1: 
To limit the probability that smoke or fire will spread from one exit into another exit, which could lead to delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons.
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