Is a 10 x 4mm intumescent seal for 30 minutes integrity and a 20 x 4mm intumescent seal for 60 minutes integrity adequate?
Whilst it is generally true that larger intumescent strips are used for higher integrity periods, the intumescent specification for the door must be as tested or assessed for that particular doorset. This is the case for:
- the size of the intumescent seal,
- the location of the seal and
- the type of seal.
NB: The type of seal is also particular to the manufacturer, as different manufacturers’ seals do not perform comparably, even if they are of the same generic type, eg graphite. It is for this reason that interchanging between different seal types and/or manufacturers is not permitted, unless there is test evidence available to demonstrate otherwise.
|
