Building panel assembly

A formwork assembly for constructing a thin shell concrete building panel and comprising:

• (a) a plurality of C-shaped sheet steel channel beams each having a central web and inner and outer edge flanges, said inner flanges having cuts therein at longitudinally spaced locations to form upwardly projecting bendable lugs, each said projecting lug having at least one lower flat part adjacent the inner flange and parallel to the central web and at least one upper part which includes at least one bendable part and at least one upwardly projecting anchoring part, and said beam members being parallel to each other and laterally spaced from each other and (b) formwork panel members resting on the outer faces of the inner flanges and extending between the beams, said formwork panel members being held against said flanges by said bendable parts being bent around the edges thereof, with the upwardly projecting anchoring parts extending outwardly between adjacent formwork panels to act as locking members within a thin shell cementitious panel to be formed on said formwork panels.

A beam or stud member for use in thin shell concrete building panels and comprising a C-shaped sheet steel channel member having a central web and inner and outer edge flanges, said inner flange having cuts therein at longitudinally spaced locations to form upwardly projecting bendable lugs, each said projecting lug having at least one lower flat part adjacent the inner flange and parallel to the central web and at least one upper part which includes at least one bendable part and at least one upwardly projecting anchoring part, said at least one bendable part being adapted to hold formwork panels and said at least one upwardly projecting anchoring part being adapted to serve as a locking member within a thin shell cementitious panel to be formed on the formwork panels.