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9.10.12.3.(2)
OS1OP1
ObjectiveOS1 Fire Safety
Attribution
Application
Application 1: 
Minimum fire-resistance rating of the exterior wall of each fire compartment referred to in Sentence 9.10.12.3.(1) [where the exterior walls of the building meet at an external angle of 135°, or less] within the 1.2 m distance of the openings.
This applies to buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
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Intent
Intent 1: 
To limit the probability that the exterior walls of fire compartments will have insufficient fire resistance, which could lead to the spread of fire from one fire compartment to an adjacent fire compartment through exterior walls, which could lead to harm to persons in the adjacent fire compartment.
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