With a fire resistance of minimum 4 hours, the SL-Deck is the world’s most fire resistant prestressed concrete slab. The SL-deck fulfills the strictest requirements without need for further fire insulating measures.
The high fire resistance is due to the design of the slab, where the prestressed reinforcement is protected by the insulating and fire resistant lightweight concrete. Lightweight concrete mainly consists of light expanded clay aggregates, which is literally ”born” in fire as it is produced in ovens at app. 1,200 degrees celcius.
Watch the test of the SL-deck’s fire resistance below: