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9.10.20.1.(1)
OS1OP1
ObjectiveOS1 Fire Safety
Attribution
Application
Application 1: 
Minimum opening size, and maximum sill height above floor level, of window or access panels [for firefighting] on the second and third storeys of buildings in at least one wall facing on a street, where such storeys are not 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].
Exceptions: 
except as stated in Sentence 9.10.20.1.(3), which applies to buildings containing only dwelling units where there is no dwelling unit above another dwelling unit.
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Intent
Intent 1: 
To limit the probability of delays or ineffectiveness in fire emergency response operations, which could lead to:
  • delays in the evacuation or movement of persons to a safe place, and
  • the spread of fire to other parts of the building.
This is to limit the probability of harm to persons.
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