MEMBRANE CEILING

Supply and installation of a membrane ceiling with fire resistance EI 120 (a←b), made with three FIREGUARD® 13 boards, 12,7 mm thick, made of calcium silicates and sulphates, asbestos-free, produced by lamination with factory-controlled drying, in class A1 (non-combustible) reaction to fire, in accordance with classification report I.G. 276492/3246FR and Technical File 399956. The boards will be screwed with phosphated self-drilling screws, diameter

3,5 mm, 25 mm long for the upper layer, 35 mm long for the intermediate layer at 600 mm centres, and 55 mm long at 250 mm centres for the lower layer, to a metal structure composed of a secondary framing consisting of galvanised steel “C” profiles, dimensions 50x27x0,6 mm, placed at 400 mm centres, and a main metal framing consisting of the same “C” profiles placed at 700 mm centres, fixed to the secondary framing by means of purpose-made orthogonal hooks and suspended with hangers at 600 mm centres.