Only if the door manufacturer has either test evidence or assessment to permit this.
All fire doors for public access should be fitted with a self-closing device. This may be a device which is linked with automatic opening (for example doors on hospital entrances which may be expected to close without human intervention) or a mechanical closer which, when the door has been manually opened, will return it to its closed position without further action on the part of the door user.
BS8214: 2008 recommends a 4mm maximum gap at the head and at the long edges as good practice but the guidance of the door manufacturer should be followed. The gap at the threshold should be no more than 6mm. It is important that the door gaps are as even as possible around the periphery of the door.
If the door provides a route of escape into the fresh air, it is not necessary for it to be fitted with fire seals.
You should follow the door manufacturer’s instructions regarding intumescent seals. It is important to use the type, dimensions and location of seal that he details, as a change to any of these could negate the likely fire resistance performance of the doorset.
Yes – if the manufacturer has test or assessment evidence for pairs of doors with rebated meeting edges.
Yes – if the manufacturer has test or assessment evidence for pairs of doors with rebated meeting edges.
Provided that the density exceeds 420kg/m3 and the timber is of good quality with minimal defects, then either softwood or hardwood is suitable for FD30 doorsets. For FD60 doorsets a good quality, straight grained hardwood with a density in excess of 650kg/m3 should be used unless the door manufacturer can provide evidence that softwood can be used. In all cases, you should follow the door manufacturer’s detail.
That will depend on the thickness of lining for which the door manufacturer has test or assessment evidence.