GB729096A - Roof construction - Google Patents

Abstract

729,096. Roofs; reinforced concrete beams. ELLIS, C. L., and HULL, L. C., [trading as RAINBOW STRUCTURES CO.]. March 24, 1953 [March 24, 1952], No. 8121/53. Class 20 (4). An arched reinforced concrete beam 17 has a reinforcement comprising bars 22 and 23, a zig-zag rod disposed between the bars 22 and 23 and welded thereto, and end pieces 26 bent as shown and welded to the bars 22 and 23 at 29 and 30. The end pieces 26 have a portion 32 parallel to the bearing surface 33 of the beam and a portion 34 perpendicular thereto. Tierods 40 and 41 may be welded to the reinforcement as at 42 and 42a and 43 and 43a respectively, being subsequently encased with concrete covering-members which have a channel to receive the tie-rods and which is then filled with concrete. Lifting lugs 46 may also be welded to the reinforcement and metal anchors 45 are embedded in the concrete of the beams for securing roofing slabs in position. In use the arched beams 17 are connected to each other by members 18 (Fig. 6) of reinforced concrete which have end-bearing reinforcements 50, projecting portions 51 of which are nailed to the beams 17. The structure is then covered with curved reinforced roofing slabs which extend between adjacent arches and are secured in position by bending over the anchors 45. Roofing material, is then used to cover the slabs.