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3.3.1.4.(4)
ApplicationIntent
OS1OP1
ObjectiveOS1 Fire Safety
Attribution
(a),(b) [F03,F05,F10-OS1.5] [F06,F12-OS1.2,OS1.5]
(c) [F03,F05-OS1.5] [F03,F06-OS1.5,OS1.2]
Application
Application 1: 
[Clause (a)] Fire separations between public corridors and the remainder of the storey, where:
  • the storey is sprinklered throughout, and
  • the travel distance from any part of the floor area to an exit is not more than 45 m notwithstanding Sentence 3.4.2.4.(2).
This applies to buildings described in Sentence 1.3.3.2.(1) of Division A.
Application 2: 
[Clause (a)] This also applies to tents and air-supported structures, as stated in Sentences 3.1.6.1.(1) and 9.10.1.2.(1).
Exceptions: 
except as required by:
  • Sentence 3.3.3.5.(9), which applies to patients' sleeping rooms,
  • Sentence 3.3.4.2.(1), which applies to suites of residential occupancy, and
  • Sentence 3.3.5.9.(1), which applies to multi-tenant self-storage warehouses.
Application 3: 
[Clause (b)] Fire separations between public corridors and rooms or suites served by the public corridor, where:
  • the storey is sprinklered throughout, and
  • the public corridor complies with:
    • Sentence 3.3.1.9.(6), which restricts the combined area of occupancies in the corridor and requires a minimum corridor width, and
    • Clause 3.4.2.5.(1)(d), which requires a minimum corridor width and ceiling height.
This applies to buildings described in Sentence 1.3.3.2.(1) of Division A.
Application 4: 
[Clause (b)] This also applies to tents and air-supported structures, as stated in Sentences 3.1.6.1.(1) and 9.10.1.2.(1).
Application 5: 
[Clause (c)] Fire separations between public corridors and spaces containing plumbing fixtures required by Subsection 3.7.2., where:
This applies to buildings described in Sentence 1.3.3.2.(1) of Division A.
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Intent
Intent 1: 
To exempt certain public corridors from the application of Sentence 3.3.1.4.(1), which would otherwise require a fire separation between a public corridor and the remainder of the storey, on the basis that the storey is sprinklered throughout and:
  • the travel distance to an exit is limited and the corridor does not serve certain occupancies, or
  • the corridor has a minimum width and ceiling height, and the combined area of the occupancies in the corridor is restricted.
This [the sprinklering] is to limit the probability that a fire will not be suppressed or controlled, which could lead to the spread of fire into the public corridor, or from the public corridor into a suite.
This [limitation on travel distance] is to limit the probability of excessive travel distance during a fire situation.
This is to limit the probability of:
  • delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons, and
  • fire emergency response operations being delayed or ineffective, which could lead to:
    • delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons, including emergency responders, and
    • the spread of fire to other parts of the building, which could lead to harm to persons.
This [the minimum corridor width and the restriction on the area of occupancies] is to limit the probability of insufficient corridor width during a fire situation, which could lead to:
  • delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons,
  • the spread of fire from occupancies on one side of the corridor to occupancies on the other side of the corridor by means of activities and occupancies in the corridor, and
  • delays or inefficiencies in emergency response operations, which could lead to:
    • delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons, and
    • the spread of fire to other parts of the building, which could lead to harm to persons.
Intent 2: 
To exempt certain public corridors from the application of Sentence 3.3.1.4.(1) by waiving the requirement for a fire separation of the corridor from a space containing plumbing fixtures required by Subsection 3.7.2., on the basis that:
  • the space is treated as part of the public corridor since there is expected to be no appreciable fire load in the room,
  • the storey is sprinklered throughout, and
  • the room and the public corridor are separated from the remainder of the storey.
This is to limit the probability of the spread of fire into the public corridor, or from the public corridor into a suite, which could lead to:
  • delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons, and
  • fire emergency response operations being delayed or ineffective, which could lead to:
    • delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons, including emergency responders, and
    • the spread of fire to other parts of the building, which could lead to harm to persons.
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