Adjustable concrete column form and panel therefor

Claim 1

IN A CONCRETE FORM ASSEMBLY, A FIRST VERTICAL RECTANGULAR PANEL COMPRISING A RECTANGULAR PLYWOOD FACING BOUNDED BY A MARGINAL STEEL FRAME INCLUDING OPPOSED VERTICAL AND OPPOSED HORIZONTAL FRAME MEMBERS WHICH PROJECT LATERALLY FROM THE GENERAL PLANE OF THE FACING IN THE SAME DIRECTION THUS DEFINING A SHALLOW TRAY-LIKE STRUCTURE, A FIRST SERIES OF VERTICALLY SPACED HORIZONTALLY DISPOSED COMPOSITE STEEL CROSSBARS EXTENDING BETWEEN THE OPPOSED VERTICAL FRAME MEMBERS ABOVE THE LEVEL OF THE HORIZONTAL MID-PLANE OF THE PANEL, A SECOND SERIES OF VERTICALLY SPACED HORIZONTALLY DISPOSED COMPOSITE STEEL CROSSBARS EXTENDING BETWEEN THE OPPOSED VERTICAL FRAME MEMBERS BELOW THE LEVEL OF SAID HORIZONTAL MID-PLANE, EACH OF SAID CROSSBARS CONSISTING OF UPPER AND LOWER ANGLE PIECES HAVING ABUTTING HORIZONTALLY EXTENDING FLANGES WELDED TOGETHER IN FACE-TO-FACE CONTACT AND PRESENTING COPLANAR VERTICAL FLANGES WHICH EXTEND IN OPPOSITE DIRECTIONS SO THAT THE VERTICAL FLANGE OF THE UPPER ANGLE PIECE PROJECTS UPWARDLY AND THE VERTICAL FLANGE OF THE LOWER ANGLE PIECE PROJECTS DOWNWARDLY, THE VERTICALLY EXTENDING FLANGE OF THE LOWER ANGLE PIECE OF EACH CROSSBAR WHICH LIES ABOVE SAID HORIZONTAL MID-PLANE OF THE PANEL HAVING FORMED THEREIN A ROW OF EQUALLY AND HORIZONTALLY SPACED, HORIZONTALLY ELONGATED SLOTS, THE VERTICALLY EXTENDING FLANGE OF THE UPPER ANGLE PIECE OF EACH CROSSBAR