Sentence 3.4.3.4.(5)

  1. OS3
  2. OP1
  3. OS1

Objective

OS3 Safety in Use

Attribution

Intent

Intent 1:

To supersede the requirements of Sentence 3.4.3.4.(1) for a minimum headroom clearance of 2 100 mm and permit a relaxation in such clearances for door closers and other devices on doorways on the basis that the small reduction permitted will have a negligible effect on the use of the doorways during an emergency situation.

This is to limit the probability:

  • of contact or collision with the doorway devices, which could lead to harm to persons,
  • that exits will have insufficient doorway heights 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, and
  • that exits will have insufficient doorway heights, which could lead to emergency responders being delayed or ineffective in carrying out their emergency response operations, 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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