GB538514A - Improvements in and relating to the construction of concrete floors and roofs - Google Patents

Abstract

538,514 Moulding concrete floors in situ. BRUCE, R. Jan. 20, 1941, No. 1200/40. [Class 20 (ii)] Shuttering supports for floor and roof constructions, comprise upper removable beams supported on the walls, lower removable beams suspended by means of bolts from the upper beams, and sleeves on the bolts where they pass through the concrete, the shutters which may be permanent or removable being supported on the lower beams. The upper beams 2 are of box shaped section formed of two channel bars clamped together by clamps .7 with apertures between the bars to receive suspending bolts 9 for lower I-shaped beams or joists 11 disposed transversely of the upper beams, which are supported. on blocks 4 on the upper edges of the walls 5. The lower beams are inter-connected by channel shaped bearer bars 14 the reduced ends of which pass through slots in the webs of the joists and are secured therein by wedges. Movable bearers 18 are supported on the ends of the bars to maintain the shutterin 1 level, and at the ends of the joists the bearer bars may be higher than intermediately. to allow the edges of the shutters to overlap. 'Extension plates may be provided for the ends of the joists each extension plate being. in the form of a channel-section bar 20 disposed one on each side of the I-shaped joist. The shuttering may be removable or if permanent may be formed of reinforced slabs, the reinforcement being bent up out of one face to penetrate the cast concrete and act as a pinder.