Insulating formwork for concrete wall

Abstract From the Canadian patent

There is disclosed an insulating formwork for casting a concrete wall, the formwork having a pair of sidewalls each of which is made-up of a plurality of coplanar edge-abutting modular panels made of insulating foam material. Each panel has upper and lower edges with coplanar slits provided therealong, and a pair of vertical end edges respectively provided with a tongue-and-groove to form vertical tongue-and-groove joints with other like adjoining panels. A rabbet opens onto the panel inner face and onto the panel lower edge. The panels are interconnected by a first group of angle-irons having vertical branches fitting into the upward slits of the, panels, and horizontal branches pierced …