Fire screen door with mineral panels - has high density frame and low density filling held with wire lattice mesh

摘要

Panels made of mineral materials are used to make up frame, filling and boarding for a door affording protection from fire. The frame (12) is undivided, and of relatively high density. The filling (13) is of homogeneous construction, with low density, while the boarding (14), likewise homogeneous, is of medium density. A steel wire lattice mesh (15) is pressed in between all these. The cost of construction of the door is low and the door has a high degree of resistance to fracture and bending.