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For additional protection at hinges, striker plates and pivot mechanism of doors
| Hinges Two 7mm diameter plain holes are drilled through each
plate in addition to the existing screw holes. These holes are offset in order that the
plates are not weakened. After fitting the hinges, 6mm diameter x 40mm deep holes are
drilled, through the plain holes, into the wood and plugs are inserted flush with the
hinge plates |
Lock/Latch Striker Plate Two 7mm diameter plain holes are drilled in the plate, so
as not to weaken it, or affect its normal operation. The plugs are fitted into the wood in
the same manner as for hinges. Gaps around mortised areas should be filled with
Intumescent Compound or Plaster to reduce fire spread. |
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| The Iayout of the
countersunk holes for fixing screws in 100mm butt hinges varies according to the
manufacturer. Three of the most common are shown here, together with suggested positions
for Sealmaster Intumescent Plugs. Where plugs have to be fitted to longer butt hinges this
must be at the rate of two extra plugs per 50mm of additional length of hinge. |
Pivot Mechanism Intumescent sealing around pivot doors can be completed by incorporating
Sealmaster Intumescent Plugs in the top strap assembly. The positioning of the plugs is
determined by the shape of the strap and the layout of the screw fixing holes, as these
can vary according to make. |
Note: All sizes in mm
All the above products, where relevant, are tested to British Standards 476: Parts 8,
20, 22 and 31.1
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