Means of construction of concrete culverts

For use in a form system for the construction of a culvert, a rectangular thin frame for vertically holding reinforcement bars while a bottom of the culvert is poured around and enveloping a bottom portion of the reinforcement bars, said thin frame comprising:

• elongated and parallel top, center, and bottom horizontal frame members;
• a pair of adjustable-in-length, vertically extendable end members, one end member connecting to one end of each of said horizontal frame members, and the other end member connecting to the other ends of said horizontal members;
• and
• a plurality of spaced guides attached to each of said frame members providing guide surfaces in parallel vertical planes normal to the plane of said thin frame, the planes in which the guide surfaces on the center frame member occur being slightly spaced from the planes in which the guide surfaces of the guides on the top and bottom members occur, whereby a generally vertically placed reinforcement bar may be generally vertically held between guide surfaces of top and bottom positioned guides in one plane and a guide surface on a guide on said center frame in an adjacent plane by the tension produced in the bar by such deformation.

A system of forms for the construction of a structure to have at least a concrete bottom and a pair of opposite parallel vertical concrete walls comprising:

• first and second vertically positioned and secured panels positioned to form the outer sides of opposite concrete walls;
• a plurality of support brackets oppositely positioned horizontally along the inner side of each of said panels at discrete and like spacing along each panel, and wherein each said bracket comprises:
• first and second connectible links forming an adjustable-in-length vertical rod,
• an L-shaped member connected at an upper end region of said rod and oriented outward to form with the length of said rod a vertically reversed U by which said rod is supported on the top edge of a said panel,
• first and second, vertically spaced, horizontal arms connected at an upper end region of said rod and extending inward and away from the panel on which the bracket is supported, and
• rebar holding beams and securing means supported by said rod for securing said rebar holding beams horizontally along each of said panels between first and second horizontal arms of said spaced brackets and spaced from an adjacent wall panel;
• a plurality of laterally extending beams, each extending and attached between a bottom region of one of said rods and a bottom region of an oppositely positioned said rod;
• and
• a riser forming beam positioned adjacent to each panel and connected between ends of said laterally extending beams.