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.
For the edge of door leaf to the surrounding door frame the overriding guidance for fire resistance performance is to follow the supporting evidence as provided, for example, by the door manufacturer or the intumescent seal provider. If the requirement is also to minimise the risk of smoke transfer then the latest recommendation is to have smoke sealing all round the door leaf (performance Sa4 in accordance with the EN smoke sealing classifications in EN 13501-2). That will include the use of a threshold smoke seal, in accordance with supporting evidence. The gap between the door frame and the supporting construction should also be adequately sealed against smoke and fire penetration. Again, the supporting evidence should be followed as priority. BS 8214 provides a number of prescribed solutions for gaps 5mm to 15mm.
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.