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9.10.8.3.(1)
ApplicationIntent
OS1OP1
ObjectiveOP1 Fire Protection of the Building
Attribution
[F04-OP1.2,OP1.3]
Application
Application 1: 
Minimum fire-resistance rating of loadbearing walls, columns and arches in the storey immediately below [and supporting] a floor or roof assembly, in 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 9.10.8.5.(1), which applies to construction supporting a service room, and
  • Sentence 9.10.8.11.(1), which applies to loadbearing walls, columns and arches that conform to the appropriate requirements in Section 3.2.
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Intent
Intent 1: 
To limit the probability that loadbearing walls, columns and arches exposed to fire will fail or collapse prematurely, which could lead to the failure or collapse of the floor or roof assembly above, which could lead to damage to the building.
Intent 2: 
To limit the probability that loadbearing walls, columns and arches exposed to fire will fail or collapse prematurely, which could lead to the failure or collapse of the floor or roof assembly above, which could lead to the spread of fire from a lower storey of a building to an upper storey or to the exterior, which could lead to damage to the building.
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