Thickness is measured as the distance between one compartment and the next, which the fire stop or barrier is separating. The 60 minute barrier has butt end joints. The 120 minute barrier has lap end joints.
Fire Resistance Minutes |
Thickness of Fire Barrier mm |
60 | 75 – up to 300mm cavity 100 – up to 600mm cavity |
120 | 100mm with lap joint |
240 | 100 EHD* with lap joint |
*EHD = Extra high density barrier
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