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9.10.4.4.(1)
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Application
Application 1: 
Consideration of rooftop enclosures as a storey in calculating building height, where the rooftop enclosures are:
  • provided for elevator machinery, stairways and service rooms, and
  • used for no purpose other than for service to the building.
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 exclude certain rooftop enclosures from the calculation of building height, on the basis that such enclosures are normally only briefly and intermittently occupied by persons and thus do not pose an undue fire safety risk to persons.
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