104mm thick (minimum) approved Supermex 4 hours fire-rated partition system with one layer of 9mm Supermex Fire Rated Board (1st layer) and two layers of 9mm UCC Standard Board (2nd and 3rd layer) both sides of the VTJ Steel Stud & Track.
Supermex 4 hrs Fire Rated Partition System was tested for Fire-rating performance in accordance with BS 476 Part 22: 1987.