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3.4.3.4.(4) | Application | Intent |
OS3 | OP1 | OS1 |
Objective | OP1 Fire Protection of the Building |
Attribution | |
Application | Application 1: Minimum headroom clearance for doorways with door
closers or other devices. This applies to exits serving floor areas that are intended for occupancy,
including mezzanines as stated in Sentence 3.4.2.2.(1),
in buildings described in Sentence 1.3.3.2.(1) of Division A.
Application 2: This also applies to:
Exceptions:
except as stated in:
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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 a fire situation. This is to limit
the probability 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 the spread of fire,
which could lead to damage to the building.
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