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3.4.6.14.(2)
ApplicationIntent
OS3
ObjectiveOS3 Safety in Use
Attribution
[F10-OS3.7]
Application
Application 1: 
Maximum exiting capacity of a revolving door used as an exit from the ground floor level.
This applies, in buildings described in Sentence 1.3.3.2.(1) of Division A, to:
Application 2: 
This also applies to:
  • ramps, stairways and passageways used by the public as access to exits, as stated in Appendix Note A-3.4.6.
  • tents and air-supported structures, as stated in Sentences 3.1.6.1.(1) and 9.10.1.2.(1), and
  • revolving doors used in exits in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], as stated in Sentence 9.9.6.4.(3).
Exceptions: 
except as stated in:
  • Sentence 3.1.6.2.(1), which prohibits air-supported structures from being located above the first storey on any building,
  • Sentence 3.1.6.2.(2), which prohibits air-supported structures from being 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,
  • Sentence 3.3.1.3.(5), which applies to rooftop enclosures,
  • Sentence 3.4.2.2.(2), which applies to mezzanines that:
    • are not required to terminate at a vertical fire separation [see Article 3.2.8.1.],
    • are not intended for an occupant load more than 60,
    • do not exceed the area limits for rooms and suites in Table 3.4.2.2., and
    • have limited travel distances to egress doors or stairs,
  • Sentence 3.4.2.2.(3), which applies to at least half of the required means of egress from a mezzanine if the mezzanine is not required to terminate at a fire separation as permitted by Sentence 3.2.8.2.(1), and
  • Sentence 3.4.6.14.(3), which applies to electrically powered revolving doors.
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Intent
Intent 1: 
To supersede the requirements of Sentences 3.4.3.2.(1) to (3) by limiting the exiting capacity of revolving doorways on the basis that these doors cause delays, slowdown, etc.
This is to limit the probability that exits will be of 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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