Supply and fire barrier to open spaces with ceilings between ceilings and ceilings of concrete consists of two layers of rock wool with reinforcement mesh
The supply of and the work of the fire barrier to ceilings open spaces between ceilings and roofs of concrete consists of two layers of rock wool with the strengthening of the retina
Supply and fire barrier for open Balasqf borrowed between bishop and bishop of the concrete reinforcement grid consists of two layers of rock wool with