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9.3.1.1.(4)
OS2OP2OH1OH4OS3OS1
ObjectiveOS1 Fire Safety
Attribution
[F20,F80-OS1.1] Applies where concrete supports or is used in chimneys or fireplaces.
Application
Application 1: 
Concrete and reinforcement in flat insulating concrete form walls not exceeding 2 storeys in building height and having a maximum floor to floor height of 3 m, in buildings of light-frame construction containing only a single dwelling unit to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for the application of Part 9], in regions where spectral response acceleration, Sa(0.2), is not greater that 0.4.
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Intent
Intent 1: 
To limit the probability of the use of:
  • inappropriate or substandard concrete,
  • inappropriate or substandard reinforcing, or
  • insufficient overlap of reinforcing bars.
This is to limit the probability of the inadequate performance or premature failure of flat insulating concrete form walls under expected environmental or structural loads.
Where concrete supports or is used in chimneys or fireplaces, this is to limit the probability of the compromised integrity of the chimney or fireplace, which could lead to the ignition of combustible building components.
This is to limit the probability of harm to persons.
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