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9.10.4.1.(4)
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Application
Application 1: 
Mezzanines, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], where:
Application 2: 
This also applies to mezzanines, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], where:
  • the aggregate area of mezzanines that are not superimposed does not exceed 40% of the open area of the room in which they are located, and
  • the space above the mezzanine floor is used as an open area without partitions or subdividing walls higher than 1 070 mm above the mezzanine floor.
Exceptions: 
except as stated in:
  • Sentence 9.10.4.1.(5), which applies to platforms intended solely for periodic inspection and maintenance that are not used for storage and are constructed with noncombustible materials, and
  • Sentence 9.10.4.2.(1), which applies to mezzanines that are superimposed above another mezzanine in the storey.
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Intent
Intent 1: 
To clarify that mezzanines that are not considered as storeys are nonetheless considered part of the floor area of the storey in which they are located because they impact on the occupant and fire loads for that storey.
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