Contains information on maximum gap allowances for different types of fire doors.
Fire door gaps.
In general the gap should not exceed 3mm along the 2 long edges and across top of the door leaf to facilitate checking of the gap on site a bwf fire door alliance scheme gap.
Whether at the head jamb or door bottom excessive gaps put lives at risk.
Nfpa 80 fire doors and other opening protectives.
3 4 between door and frame.
How big should gaps around fire doors be.
1 8 meeting edges for a pair of doors.
In general those allowed gaps are as follows.
You can measure the gap with a simple gap gauge.
1 8 for more detailed gap information refer to nfpa 80 section 6 3 1 7 and section.
In general clearance for those allowed gaps are as follows.
The old test of fire doors to bs 476 part 8 for fire resistance was carried out simply in a furnace increasing the temperature to that found in rooms on fire and the door was checked to ascertain when the fire would breach the door usually at the gaps at the head and sides of the door.
Nfpa 80 fire doors and other opening protectives contains information on maximum gap allowances for different types of fire doors.
The gap between the door and the frame is extremely important and must be suitable for the intumescent seal fitted.
What gaps are required around a door and its frame.
Under the bottom of a door.
Clearance for under the bottom of a door.
3 4 clearance between door and frame.
Safelincs provides gap gauges free of charge on request.