Fire and hot gases can easily pass through gaps around the door within seconds and so to ensure the safety and reliability of the door always fit.
Fire door gaps uk.
Gaps around the fire door should be 3mm or less to stop smoke.
This makes the gap between the carpet and doors around 10 15mm.
1 8 meeting edges for a pair of doors.
Nfpa 80 fire doors and other opening protectives.
Regulations which apply the directive and its requirements in the uk.
What gaps are required around a door and its frame.
Underneath the fire door a gap of 8mm is traditionally acceptable although for fire doors that are required to limit spread of cold smoke only 3 mm is permissible with a threshold seal to be fitted if the gap is bigger.
Check for a label or a plug on top or on the side of each door for a fire resistance rating.
It should be 8 10mm max from bottom of the door to the surface onto which the carpet etc is laid.
If there isn t one it is most likely not a fire door and will not protect you in a fire.
Bs9999 2008 recommends for fire doors with cold smoke control that the threshold gap should be either less than 3mm in height or should be fitted with a threshold seal.
In general clearance for those allowed gaps are as follows.
Fire doors need a seal around the edges which swells when heated to block any gaps if the doors are fitted with windows the glazing must be fire resistant all ironmongery on the doors needs to be fire resistant.
Fire doors basic guidance.
3 4 between door and frame.
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.
I work in a relatively new office buiding that has internal fire doors with cold smoke seals and the gaps under the doors range from 5mm to 10mm.
Nothing must be cut at the top at all and the certification label must remain intact.
The gap between the door and the frame is extremely important and must be suitable for the intumescent seal fitted.
All fire doors display certificates and relevant markings to verify their fire integrity.
1 8 for more detailed gap information refer to nfpa 80 section 6 3 1 7 and section.
How much can you cut off a fire door.
Gaps between fire doors and the door frame should never be more than 4mm or less than 2mm.
Please could you confirm or otherwise my understanding that the maximim 8 10mm gap usually cited as permissible at the bottom of the fire door should be to allow for the carpet i e.
Ce marked hinges tested to bs en1935 should be used on fire or smoke.
