3 4 between door and frame.
Gap between double fire doors.
Contains information on maximum gap allowances for different types of fire doors.
Where you have a double leaf door set what is the permissible gap between the cold smoke seals on each door.
In general clearance for those allowed gaps are as follows.
Worryingly the fire door inspection scheme fdis recently highlighted that three quarters of all fire doors inspected in 2019 were condemned as not fit for purpose.
1 8 for more detailed gap information refer to nfpa 80 section 6 3 1 7 and section.
When a 1 8 in thick tool fits into the gap with no lateral movement the gap is within nfpa 80 s specifications.
Therefore it is incorrect to apply the 1 8 inch gap.
The meeting edge clearance between double egress pairs of doors measured from one side only may potentially exceed 3 16 since the measurement would be from the pull side of one door to the push side of the other door.
Under the bottom of a door.
Control of door gaps gaps between fire doors and the door frame should never be more than 4mm or less than 2mm.
Bs 8214 2008 states that the gap along the sides top and between the leaves of a double door should be 3 mm 1 mm.
Nfpa 80 fire doors and other opening protectives.
Under door threshold gaps should be in accordance with the manufacturer s installation instructions for the particular doorset design.
In this case an allowance should be made for the degree of bevel.
For example the maximum door gap dimension for 3 4 hour and greater rated wood fire doors is 1 8 in no over tolerance dimension is permitted.
If you own a commercial or non domestic property there are strict regulations and guidelines to follow ensuring the doors can withstand certain heats.
I understand that the gap around a door should be no more than 3mm 1mm to allow the intumescent seal to expand although there is more leeway with the bottom of it.
1 8 meeting edges for a pair of doors.
Double doors can make a grand impression at the main entrance to a home but if there is a gap between them they re losing a lot of heat.