Patent ID: 8734691

Claim:
A method for constructing site-cast or precast concrete floors, roofs and decks, the method comprising: forming one piece elongated foam forms having a first pier and a second pier, the first pier and second pier being connected together at the bottom thereof and having a space between the first and second piers thereby forming an elongated cavity for reception of concrete in an uncured form; forming an elongated slot of a predetermined cross sectional shape in the first and second piers along the bottom of each of the first and second piers along the length of the first and second piers; placing a wood member of approximately said predetermined cross sectional shape into each of the elongated slots of the first and second piers to form an assembled combination of the foam form and wood members; placing a plurality of the assembled combinations in juxtaposition with respect to each adjacent assembled combination on a support surface; placing rebar in the cavity of each assembled combination; pouring concrete in an uncured form over the assembled combinations and into the cavities of the forms; and allowing the concrete to cure to thereby form a concrete panel; and wherein foam pieces are removed from the foam form during the forming of the elongated slot; wherein at least some of the wood members are removed from at least some of the elongated slots for reuse; wherein the removing of at least some of the wood members is done by alternating removal by removing every other one of the wood members; and wherein at least some of the foam pieces are placed in the elongated slots where the wood members were removed.