Abstract: Reinforcement body for a cast concrete floor slab provided with stiffening ribs, having a foundation reinforcement (1), a distribution reinforcement (2) and at least one displacement body (8) e.g. of polystyrene foam, arranged between these reinforcements which delimits cavities to accept the stiffening ribs. The displacement body is rigidly fixed between the reinforcements by means of spacer wires (7) connecting the foundation reinforcement to the distribution reinforcement (2) at a selectable distance, e.g. by passing through the displacement body, so that the foundation reinforcement, the distribution reinforcement and the displacement body form a dimensionally stable unit. Additional reinforcement elements (10, 11, 15), can be placed in the rib cavities (9).

Abstract: A lining-frame for a gallery or tunnel comprises two planar latticework trussed arches, each comprising an inner belt (3,4) and an outer belt (1,2) interconnected by a zig-zag rod chain (5,6). The arches are fixed parallel to one another by planar connector elements (81a,82a:81b,82b).

Abstract: A unit for bonding two structural reinforced concrete components comprises a mounting strip having a pair of oppositely directed main faces and a plurality of connector rods held firmly on the mounting strip. Portions of the connector rods project at intervals along one side of the mounting strip and the connector rods have arms bent to a knee shape, the arms being positioned within the mounting strip. One of the main faces of the strip on the side away from the projecting portions of the connector rods defines at least two grooves parallel with one another and extending in the longitudinal direction of the mounting strip. The grooves have a width substantially equal to the diameter of the connector rods and a depth at least equal to the diameter. The mounting strip further includes holes at intervals along its length, the holes extending from the bottoms of respective ones of the grooves towards the opposite main face of the mounting strip.