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9.9.5.5.(1)
ApplicationIntent
OS3
ObjectiveOS3 Safety in Use
Attribution
[F10-OS3.7]
Application
Application 1: 
Maximum reduction in width, by obstructions such as posts or turnstiles, of required means of egress from floor areas or parts of floor areas, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
Exceptions: 
except:
  • where an alternate unobstructed means of egress is provided adjacent to and plainly visible from the restricted egress,
  • for means of egress that are within dwelling units or that serve not more than one dwelling unit, as stated in Sentence 9.9.5.1.(1), and
  • as stated in Sentence 3.8.1.3.(1), 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 obstructions in a required means of egress will reduce the width of the means of egress to less than the required width, which could lead to insufficient width to permit efficient egress in an emergency situation, which could lead to delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons.
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