Metallic frame in order to trap the ceiling or a trap for access to the ventilation ducts or similar profile, for its embodiments and

摘要

The frame has a T-section profile bent from sheet steel for forming a web (2) and wing (3), the wing being bent three times further perpendicularly (4,5,6) to form an open caisson with the last edge (6) parallel to the web (2). The frame is made of four elements cut to length and welded together. The web has fixing holes (10) and screws (9) for fixing to the partition (8) and access cover (11) has an L section rim (12) for fitting on the face (5) of the frame, the connection between cover and frame being a magnet (13). It resists deformation due to impact, thermal stressing etc.