Prefabricated assembly for poured concrete forming structures

Claim 1

A modular assembly for poured conrete forming, said assembly comprising a plurality of interconnecting rigid panel members and releasable locking members therefor, said panel members and said locking members each being integrally formed; said panel members having a rear portion thereof and a front facing for contact with poured concrete to form a mold surface therefor; said rear portion of the panel members providing at least two flange members extending generally rearwardly of said front facing, each of said flange members being longitudinally disposed respectively adjacent each of at least two opposed terminal edges of the said panel members; said panel members, adjacent said front facing, further providing a stepped portion at one of said terminal edges thereof, and a corresponding protruding edge portion at the other of said terminal edges thereof for intimate engagement with the said stepped portion of an abutting panel member; each of the said flange members providing a mating surface for abutment in intimate contact with an adjacent flange member of an abutting panel member, each of said flange members further providing receiving means for releasably retaining a said locking member for securing two abutting panel members of said assembly, said receiving means comprisign a slotted guide means for releasably retaining a said locking member in slip-fit engagement, said guide means being formed by the superposition of two communicating slots respectively provided in said adjacent flange members of two abutting panel members, said slots being generally L-shaped and each comprising first and second slot segments, said first slot segment being open to the rear portion of said panel members and extending generally towards the said front facing thereof, said second slot segment communicating with said first slot segment and being disposed in a direction substantially parallel to the front facing of said panel members.