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.