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3.2.2.35.(4)
ApplicationIntent
OS1OP1
ObjectiveOS1 Fire Safety
Attribution
[F02,F04-OS1.2,OS1.3]
Application
Application 1: 
Sprinkler system installation in spaces below tiers of seats in a Group A, Division 4 major occupancy. This applies in buildings that have no restrictions on building height or building area.
This applies to buildings to which Part 3 applies [see Sentence 1.3.3.2.(1) of Division A for application of Part 3].
Exceptions: 
except:
  • a storey in which more than 10% of the area is classified as a Group A, Division 4 major occupancy but in addition has more than 10% of the area classified as a major occupancy that has more stringent requirements in accordance with Articles 3.2.2.20. to 3.2.2.34. and 3.2.2.36. to 3.2.2.83., and
  • a storey in which more than 10% of the area is classified as a Group A, Division 4 major occupancy but also has a portion of its floor area used for a Group F, Division 1 or 2 occupancy.
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Intent
Intent 1: 
To limit the probability that loadbearing walls, columns and arches exposed to fire will prematurely fail or collapse, which could lead to the failure or collapse of supported floor or roof assemblies during the time required to achieve occupant safety and for emergency responders to perform their duties, which could lead to harm to persons.
Intent 2: 
To limit the probability that floor or roof assemblies exposed to fire will prematurely fail or collapse during the time required to achieve occupant safety and for emergency responders to perform their duties, which could lead to harm to persons.
Intent 3: 
To limit the probability that loadbearing walls, columns and arches exposed to fire will prematurely fail or collapse, which could lead to the failure or collapse of supported floor assemblies, which could lead to the spread of fire from a lower portion of a building to an upper portion or to the exterior during the time required to achieve occupant safety and for emergency responders to perform their duties, which could lead to harm to persons.
Intent 4: 
To limit the probability that floor or roof assemblies exposed to fire will prematurely fail or collapse, which could lead to the spread of fire from a lower portion of a building to an upper portion or to the exterior of the building during the time required to achieve occupant safety and for emergency responders to perform their duties, which could lead to harm to persons.
Intent 5: 
To limit the probability that, in the event of a fire, the absence of fire suppression systems within a space will lead to the growth of fire, which could lead to the spread of fire within the space during the time required to achieve occupant safety and for emergency responders to perform their duties, which could lead to harm to persons.
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