Patent ID: 7144530

Claim:
A method of forming a cementatious structure comprising the steps of: providing a first forming panel having a face panel presenting a front and a rear side and an elongated channel having a threaded slot extending rearwardly from said face panel, said channel having a plurality of parallel ribs on opposite sides of the slot. said ribs extending longitudinally along the slot and projecting laterally into the slot from said opposite sides thereof, the ribs on one side of the slot being oriented relative to the ribs on the other side of the slot so as to render the slot threaded, said face panel having a hole aligned with said threaded slot of said elongated channel; inserting an elongated member through said hole; threadably coupling said elongated member to said threaded slot; pouring cementatious material against said front side of said first forming panel; allowing the cementatious material to cure around the elongated member; and decoupling the elongated member from the threaded slot and removing the elongated member and the first forming panel from the cured cementatious material.