10 Mm Gap Under Fire Door

Under the bottom of a door.

10 mm gap under fire door.

Doors with a horizontal cross bar meet the requirements for separating elements in fire rating classes e30 ei15 and a30. Contains information on maximum gap allowances for different types of fire doors. Nothing must be cut at the top at all and the certification label must remain intact. However for test purposes the threshold gap is taped and some form of effective threshold seal should be used if complete smoke control is to be achieved unless the threshold gap does not exceed 3 mm at any point.

The gap between the door and the frame is extremely important and must be suitable for the intumescent seal fitted. 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. 3 4 between door and frame. Nfpa 80 fire doors and other opening protectives.

When speaking with manufacturers however a common statement is that a fire doors gap of up to 8 mm underneath the door is permissible. In general the gap should not exceed 3 mm. The doors can be designed with anti finger trap. 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 tester is available on request here.

From what i can make out building regs part f is saying that with an mvhr system internal doors should have a total of 7600mm air flow gap the example they quote is for a standard size of 760 door the gap underneath would need to be 10mm. How much can you cut off a fire door. 1 8 for more detailed gap information refer to nfpa 80 section 6 3 1 7 and section. 1 8 meeting edges for a pair of doors.

Fire door seals august 2012 bw623 gap tester outlines indd 2 20 10 10 11 24 31 giving you the facts about fire door seals. 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. Our fire door gap gauge is a handy tool designed for easy use thanks to the clearly marked dark blue recommended door gap area. The gaps between a fire door and its frame need to be 2 to 4mm in width to ensure that both the door can close smoothly and that the fire cannot spread through the gap of the fire door.

In general clearance for those allowed gaps are as follows.