Patent ID: 7290750

Claim:
A form for constructing concrete pier blocks comprising: four substantially planar side walls made from corrugated plastic having spaced, integral interconnecting ribs between two facing sheets of plastic; each side wall having a first end, a second end, an interior surface, an exterior surface, a top edge, and a bottom edge; the first end of each side wall being immediately adjacent to the second end of another of the side walls such that a corner is formed at each end of the side walls, thereby defining a form interior for the placement of concrete and an exterior; and each side wall having a plurality of scored areas such that the scored areas form reinforcing bar tabs and each of the reinforcing bar tabs being further scored for a reinforcing bar insertion hole; whereby the reinforcing bar tabs can be pushed into the interior of the form and the corrugated plastic can be removed from the scored area on the reinforcing bar tabs thereby forming the reinforcing bar insertion hole on each reinforcing bar tab and the ends of the sections of the reinforcing bars can be placed in the reinforcing bar insertion holes such that the sections of the reinforcing bars extend across the interior of the form at generally right angles to two of the side walls and generally parallel to the other two side walls.