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9.8.8.3.(4)
ApplicationIntent
OS3
ObjectiveOS3 Safety in Use
Attribution
[F30-OS3.1] [F10-OS3.7]
Application
Application 1: 
Minimum height of all guards for flights of steps in required exit stairs (therefore excluding landings), in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
Exceptions: 
except:
  • for flights of steps in required exit stairs (therefore excluding landings),
  • as stated in Sentence 9.8.8.3.(2), which applies to interior guards within dwelling units,
  • as stated in Sentence 9.8.8.3.(3), which applies to exterior guards serving not more than one dwelling unit and serving a walking surface not more than 1 800 mm above the finished ground level, and
  • as stated in Clause 3.8.3.4.(1)(e), which applies to barrier-free design in buildings described in Sentence 3.8.1.1.(1) [see Sentence 9.5.2.1.(1)].
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Intent
Intent 1: 
To limit the probability that guards will not be high enough to provide reasonable fall protection, which could lead to:
  • persons falling, or
  • persons falling in an emergency, which could lead to delays in the evacuation or movement of persons to a safe place.
This is to limit the probability of harm to persons.
Intent 2: 
To supersede the guard height requirement stated in Sentence (1), in cases where the risk of falls and injury is reduced because occupants are likely to be familiar with their surroundings.
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