Patent ID: 7243897

Claim:
A form section comprising: a pair of substantially planar side walls made from corrugated plastic having spaced, integral interconnecting ribs between two facing sheets of plastic, each side wall having a long axis, a first end, a second end, an interior surface, an exterior surface, a top edge, and a bottom edge; the side walls being constructed such that channels created by the integral interconnecting ribs are open at the top edge and the bottom edge of the side walls; means for connecting the side walls to each other such that the interior surfaces of the side walls face each other the means for connecting the side walls to each other such that the interior surfaces of the side walls face each other is an interlocking support having a top support and a bottom support; the top support having ends that are configured for insertion into a space between the integral interconnecting ribs of the corrugated plastic at the top of the side walls such that the top support will rest on the top edge of the side walls; the top support further having a reinforcing bar guide member extending from each end downward into the space between the two side walls to a top support cross member that spans the space between the guide members; the bottom support having ends that are configured for insertion into the space between the integral interconnecting ribs of the corrugated plastic at the bottom of the side walls; the bottom support further having a support leg extending from each end upward into the space between the two side walls to a bottom support cross member that spans the space between the support legs; and; the bottom support cross member is pulled over the top support cross member, the top support and the bottom support are interlocked; means for supporting horizontal reinforcing bars within the form section; means for securing vertical reinforcing bars within the form section; means for securing the form section in a desired location; and means for ensuring that the form section is level.