Abstract: A weldless stirrup spacer for manual installation, without a tool, on the concentric or parallel inner and outer reinforcement wire cages of reinforced concrete pipe or other concrete structures so as to position and maintain the cages at the required spaced-apart location. The spacer is formed as a unitary resilient wire member having a pigtail-shaped hook end at one end of a central spanning portion and a fastening end portion at the other end of the spanning portion. When installed, the pigtail-shaped hook end encircles a main reinforcement wire of the inner reinforcement cage, and the fastening end portion resiliently captures an opposed main reinforcement wire of the outer reinforcement cage. The fastening end portion includes a rounded loop portion which extends beyond the outer cage to contact the adjacent mold wall and space the outer reinforcement cage at the appropriate concrete-cover distance from the mold surface.

Abstract: A weldless stirrup spacer for manual installation, without a tool, on the concentric or parallel inner and outer reinforcement wire cages of reinforced concrete pipe or other concrete structures so as to position and maintain the cages at the required spaced-apart location. The spacer is formed as a unitary resilient wire member having a pigtail-shaped hook end at one end of a central spanning portion and a fastening end portion at the other end of the spanning portion. When installed, the pigtail-shaped hook end encircles a main reinforcement wire of the inner reinforcement cage, and the fastening end portion resiliently captures an opposed main reinforcement wire of the outer reinforcement cage. The fastening end portion includes a rounded loop portion which extends beyond the outer cage to contact the adjacent mold wall and space the outer reinforcement cage at the appropriate concrete-cover distance from the mold surface.

Abstract: A weldless spacer for manually connecting without a tool two reinforcement cage wires or re-bars of a concrete reinforcing structure in spaced-apart relation is a unitary resilient wire member that has an elongated spanning portion that extends between the reinforcement wires, a hook end portion at one end of the spanning portion, and a fastening end portion at the other end of the spanning portion. The hook end portion includes a detent part and a V-hook part, which are joined by a spacer loop part and capture one of the reinforcement wires. The fastening end portion includes a detent part and a J-hook part, which are joined by a spacer loop part and capture the other reinforcement wire. One or both of the spacer loops are sized to space the reinforcement wire(s) at a desired distance(s) from the adjacent concrete form wall(s) for sufficient concrete cover.

Abstract: A spacer for welded-wire concrete reinforcement includes an upper pigtail portion, a central shank portion, and a lower hook portion. The lower section of the shank portion slopes outwardly and downwardly to define a nose-like spacing projection to position the wire reinforcement relative to the surface of the concrete mold. The spacing nose also serves as a handgrip for facilitating installation of the spacer on the wire reinforcement. The spacer requires only one pair of intersecting wires for installation and is adapted for use with all mesh spacings, including helical cages, and all wire sizes.

Abstract: A spacer for concrete wire reinforcement is comprised of a heavy gauge, flat metal spring steel band, having a hook at one end for receipt of one of two parallel wires of a wire mesh, and a curved and hook-like opposite end which can be resiliently forced into position under the second wire to securely retain the spacer in position. A generally V-shaped projection is provided on the spacer to position the wire mesh at the desired distance from the surface of the concrete mold. The apex of the projection is formed to have a convex wide-radius "ball-bearing" shape. This shape lends increased strength to the spacer and also results in a greatly reduced area of contact between the spacer projection and the mold wall. The spacer also includes a tail-like extension on the second hook-like opposite end, which extension coacts with a pronged tool during installation of the spacer on a wire mesh.