Sentence 3.4.6.17.(1)

  1. OS1
  2. OS3

Objective

OS3 Safety in Use

Attribution

[F10,F81-OS3.7]Applies to exit and egress doors that comply with the stated Sentences.

Intent

Intent 1:

To supersede the requirements of Sentence 3.4.6.16.(1), which would otherwise require doors to be readily openable, and permit exit and egress doors in certain floor areas to be locked if certain conditions are met [the exit and egress doors comply with Sentences 3.4.6.17.(2) to (9)].

This is to limit the probability that:

  • the public will be locked in the floor area, which could lead to delays in the evacuation or movement of persons to a safe place in an emergency situation, which could lead to harm to the public,
  • egress and exit doors will not be readily openable 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,
  • persons will not be familiar with the location of emergency exits, which could lead to delays in the evacuation or movement of persons to a safe place in an emergency situation, which could lead to harm to persons, and
  • travel distances to an exit door will be excessive, which could lead to delays in the evacuation or movement of persons to a safe place in an emergency situation, which could lead to harm to persons.

Intent 2:

To state the application of Sentences 3.4.6.17.(2) to (9).

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