Importance

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Abstract

A concrete forming structure including a collapsible form having at least one form panel section. The section having a marginal flange structure mounted thereon at one side and vertically spaced slots on the marginal flange structure for receiving wedge bolts at selected intervals. A one-way escape hinge structure for the form including a pair of first and second hinge plates, the hinge plates including a hinge securing said plates at one of their ends. The first of said hinge plates having vertically spaced wedge bolt slots spaced at intervals generally coinciding to the spacing of the slots on the marginal flange of the panel section. Locking pairs of wedge bolts each having an enlarged end are provided. One wedge bolt of each pair extends through the cooperating slots in the first hinge plate and the marginal flange structure of the panel section with its enlarged end resting against the hinge plate. The other wedge bolt of each pair extending transversely through a slot in the wedge bolt locking the pair of wedge bolts in assembly to secure the hinge plate to the marginal flange structure of the panel section. The second hinge plate has an angle. Means secures one angle leg of the angle in assembly with the second hinge plate. The second hinge plate has spaced clearance slots each alignable with one of the slots in the first hinge plate and the enlarged end of the wedge bolt extending through the second hinge plate for allowing the hinge plate to be positioned in parallel relation to one another. Spacer pads mounted on one of the hinge plates for holding the hinge plates apart and having a thickness sufficient to allow the hinge plates to be positioned in generally parallel relationship without interference from the enlarged ends of the wedge bolts extending through the first hinge plate.

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First Claim