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3.2.1.1.(4)
ApplicationIntent
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Application
Application 1: 
Mezzanines, with respect to calculating the building height, in buildings described in Sentence 1.3.3.2.(1) of Division A, where:
  • the aggregate area of mezzanines that are not superimposed does not exceed 10% of the floor area in which they are located, and
  • the area of a mezzanine in a suite does not exceed 10% of the area of that suite.
Exceptions: 
except as exempted in:
  • Sentence 3.2.1.1.(3), which applies to space above mezzanines, in buildings described in Sentence 1.3.3.2.(1) of Division A 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:
      • is used as an open area without partitions or subdividing walls higher than 1 070 mm above the mezzanine floor,
      • is an enclosed space not exceeding 10% of the area of the room in which the mezzanine is located if the enclosed space does not obstruct visual communication between the open space above the mezzanine and the room in which it is located, or
      • is occupied by open book shelves in a library building, where the height of the shelves is not more than 2.1 m, and not more than 75% of the floor-to-ceiling height of the space above the mezzanine floor assembly,
  • Sentence 3.2.1.1.(5), which applies where one or more levels of mezzanine is partially or wholly superimposed above another mezzanine in the storey,
  • Sentence 3.2.1.1.(6), which applies to platforms intended solely for periodic inspection and elevated maintenance catwalks that are not used for storage and are constructed with noncombustible materials, unless the building is permitted to be of combustible construction.
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Intent
Intent 1: 
To exclude mezzanines from the calculation of building height and to exempt them from the conditions stated in Sentence 3.2.1.1.(3) if certain conditions are met that limit the size of the mezzanines, on the basis that this configuration does not pose an undue fire safety risk to persons.
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