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3.1.7.5.(1)
OS1OP1
ObjectiveOS1 Fire Safety
Attribution
Application
Application 1: 
Minimum fire-resistance rating of loadbearing walls, columns and arches in the storey immediately below a floor or roof assembly required to have a fire-resistance rating, in buildings described in Sentence 1.3.3.2.(1) of Division A, except as permitted by:
  • Sentence (2), which applies to walls, columns and arches supporting a service room or service space,
  • Articles 3.2.2.20. to 3.2.2.83. for mixed types of construction.
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Intent
Intent 1: 
To limit the probability that such structures will have insufficient resistance to fire, which could lead to the collapse of the structures and their supported assemblies, which could lead to harm to persons.
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