Fire Stopping - Small voids- 1 hour Cavity Barrier

Fire Barrier Slab used to close voids up to 1m in height and 20m in length supported by a structure offering the same fire performance.
 
The slabs are cut to height and friction fitted within the opening. Acoustic Intumescent Sealant is applied to the butt joints and perimeter of the barrier.

Service penetrations
The Rockwool Fire Barrier Slab can be penetrated by steel pipes of up to 33mm external diameter or smaller, and steel cable trays of 305 x 50mm or smaller.

These penetrating services must be independently supported a maximum of 150mm from the face of the slabs. Acoustic Intumescent Sealant is applied to form a tight bond where the penetration passes through the face of the slab.

Fire performance of Rockwool Fire Barrier Slab
No penetrations                       4 hour integrity;    1 hour insulation
 
Service penetrations                1½ hour integrity; 1 hour insulation
 
When subjected to BS 476:Part 20 and 22: 1987 – reference WFRC – report C122729

Acoustic Intumescent Sealant
All joints use Acoustic Intumescent Sealant to ensure a tight fit during a fire situation.

Flammability
When subjected to flame, Acoustic Intumescent Sealant will intumesce (expand and char), thus blocking the passage of smoke and flame.

Service temperature range
-20°C to +70°C

See technical datasheet for more