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9.10.9.15.(3)
OS1OP1
ObjectiveOS1 Fire Safety
Attribution
Application
Application 1: 
Fire separations that separate public corridors from the remainder of the building, where:
  • the floor area is sprinklered,
  • the sprinkler system is electrically supervised in conformance with Sentence 3.2.4.9.(2),
  • the operation of the sprinkler system will cause a signal to be transmitted to the fire department in conformance with Sentence 3.2.4.7.(4), and
  • the corridor exceeds 5 m in width.
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: 
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Intent
Intent 1: 
To exempt public corridor separations from the application of Sentence 9.10.9.15.(1) by waiving the requirement for a fire separation if certain conditions are met [i.e. the floor area is sprinklered throughout, the sprinkler system meets certain operational requirements, and the corridor has a minimum width].
This [the sprinklering and the minimum corridor width] is to limit the probability:
  • that a fire will not be controlled or suppressed [sprinklering], which could lead to the spread of fire into the public corridor, or from the public corridor into a suite, and
  • of overcrowding in corridors during a fire situation [minimum corridor width].
This is to limit the probability of:
  • delays in the evacuation or movement of persons to a safe place, or
  • delays or ineffectiveness in fire emergency response operations, which could lead to
    • delays in the evacuation or movement of persons to a safe place, or
    • the spread of fire to other parts of the building.
This is to limit the probability of harm to persons.
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