Collapsible forming system and method

A collapsible preassembled forming system for a hardenable material comprising a pair of wall panels of lightweight substantially inflexible material, said wall panels being adjustable between an operative mode wherein said panels are in a predetermined spaced relation for accommodating the hardenable material therebetween and a collapsed inoperative mode wherein said panels are in an offset at least partially face to face proximate relation for transporting said wall panels while in the collapsed mode to a job site;

• and grid means pivotally interconnecting said panels, said grid means including a plurality of relatively spaced grid assemblies, each having a skeletal first section disposed intermediate said panels and defining a plane substantially perpendicular to said panels when the latter are in said operative mode and substantially parallel to interior surfaces of said panels when the latter are in an inoperative mode, said skeletal first section having a plurality of elongate first rods substantially spanning the distance between said panels when in the operative mode, and a plurality of elongate second rods affixed to said first rods and retaining the latter in a predetermined spaced relation, and a plurality of second sections, each having a first portion engaging an exterior surface of one wall panel and a plurality of relatively spaced second portions extending angularly from said first portion through said one wall panel and each having an end terminating adjacent an interior surface of said one wall panel, said terminating end and an adjacent end of a predetermined first rod coacting to form a pivotal connection between the skeletal first section and the said one wall panel, said grid means permanently affixing said wall panels to exterior surfaces of the hardenable material accommodated between said wall panels when in a hardened state.