Spacer for reinforced concrete structures

For use with a concrete reinforcing mesh having parallel wires:

• a spacer for attachment to the wires and including a projection for locating a point on a surface spaced from the mesh, the spacer being an elongated member positionable with its length crosswise of the wires and having a first hook means at one end for hooking over one wire of the mesh and a second S-shaped hook means at the other end for hooking over a second parallel wire to retain the spacer on the mesh by the resilient reaction force between the S-shaped hook and the second wire, characterized in that the spacer member is of hairpin shape having a bight and a pair of parallel, coplanar legs extending from the bight to respective terminal end portions, said terminal end portions forming duplicate hooks constituting the first hook means and the junction of the legs with the bight forming duplicate S-shaped hooks constituting the second hook means, each S-shaped hook having its portion that merges into the bight extended in prologation of the member and combining with the bight to form a looped lever arm receivable of a force-applying tool between the looped lever arm and the outside face of the mesh, for facilitating the application of force to the bight end of the spacer to cam the S-shaped hooks over the second wire during installation of the member on the mesh, said member being formed of relatively heavy-guage spring steel capable of gripping the wires without permanent distortion of itself.