Gap Between Double Fire Doors

Under the bottom of a door. They are abrasion resistant neoprene. In general clearance for those allowed gaps are as follows.

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The door gap the gap between the door leaf and the frame must be suitable for the intumescent seal fitted.

Gap between double fire doors.

1 8 meeting edges for a pair of doors. 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. Brush seals have flexible filaments that conform to fill gaps. The filaments are nylon for good wear resistance.

Nfpa 80 fire doors and other opening protectives contains information on maximum gap allowances for different types of fire doors. Gaps between fire doors and the door frame should never be more than 4mm or less than 2mm. It s recommended to aim for a 3mm gap to ensure adequate room for the intumescent strips to activate in the event of a fire and for the smoke seal strips if installed to not get damaged by the opening and closing of the door. When a 1 8 in thick tool fits into the gap with no lateral movement the gap is within nfpa 80 s specifications.

In general the gap should not exceed 3 mm. Wraparound seals create a seal on both sides of a door. 3 4 between door and frame. If the doors are solid wood they are susceptible to swelling and shrinkage in response to changes in the weather and these shifts are magnified in the case of double doors.

To facilitate the checking of this gap on site the bwf certifire fire door and doorset scheme has produced a gap tester which can be used for this purpose. 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. Flat seals press against surfaces to create a seal. 1 8.

Seal the space between your double doors. All safelincs seals are available for single and double fire doors and can be fitted in the frame or the door leaf. British standards set out details on the permitted gaps around a fire door. 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.

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