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3.3.1.18.(1)
ApplicationIntent
OS3
ObjectiveOS3 Safety in Use
Attribution
[F30-OS3.1]
Application
Application 1: 
Minimum height of guards:
  • around a roof to which access is provided for other purposes than maintenance,
  • at openings into smoke shafts referred to in Subsection 3.2.6. that are less than 1 070 mm above the floor, and
  • at raised floors, mezzanines, balconies, galleries, interior or exterior vehicular ramps, and at other locations where the difference in level is more than 600 mm.
This applies to buildings described in Sentence 1.3.3.2.(1) of Division A.
Application 2: 
This also applies to tents and air-supported structures, as stated in Sentences 3.1.6.1.(1) and 9.10.1.2.(1).
Exceptions: 
except as stated in:
  • Sentence 3.3.1.18.(4), which applies to the front edges of stages and loading docks [that are higher than the floor or ground surface in front of them],
  • Sentence 3.1.6.2.(1), which prohibits air-supported structures to be located above the first storey on any building,
  • Sentence 3.1.6.2.(2), which prohibits air-supported structures to be used for classrooms or for Groups B, C, or Group F, Division 1 major occupancies,
  • Sentence 3.1.6.2.(3), which requires air-supported structures to be designed as open floor spaces without interior walls, mezzanines, intermediate floors or similar construction,
  • Article 3.3.2.9., which applies to indoor and outdoor places of assembly with fixed seats, and
  • Article 3.3.1.14., which applies to ramps and stairways.
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Intent
Intent 1: 
To limit the probability that persons will fall from a higher level to a lower level, which could lead to harm to persons.
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