|Fire Resistance||Minimum Length of Fire Stop Block mm|
|Minutes||Height up to
|240||100 EHD*||100 EHD*|
*EHD = Extra high density barrier, EHD is not required for dovetail blocks
Length relates to the amount of fire stopping material required between one compartment to the next. The total length may be made up from two shorter blocks (i.e. two 50mm long blocks inserted either side of the wall or partition equate to a 100mm fire seal). The minimum length of block available is 50mm.