Abstract: System for forming concrete tilt up wall panels, wherein a plurality of form pans are assembled on guide bars resting on a flat surface by receiving lugs on the guide bars into openings in flanges of the form pans, the flanges of adjacent form pans being overlapped and being engaged with common guide bar lugs. The form pan assembly is surrounded by metal members forming a boundary for the overall form. Inserts may be placed in the forms for providing connections for lifting, and for propping up the finished wall panel. Several connection appliances are provided by the invention.

Abstract: A form pan section comprising a top wall and opposed side walls depending from a respective opposed side of the top wall. A support flange is provided along a free edge of each of the side walls. The support flange has a load supporting bearing section. Means is provided in each of the support flanges to secure the flange to supporting framework. Connection means is provided inwardly of the top wall and side walls to interconnect the pan section to another pan section. A form pan is constructed of at least two end pan sections having the above-described characteristics.

Abstract: A form for moulding a roof or intermediate floor slab for a substantially rectangular enclosure, the form comprising a plurality of substantially rectangular panels each defining a flat substantially rectangular moulding surface, the panels being designed so that they can be arranged and supported in chessboard array to define a substantially flat continuous moulding surface extending over said enclosure, said array being supported by an edge secured to the walls of the enclosure or to the form for casting these walls.

Abstract: The present invention encompasses a form pan for use in a form structure, the pan comprising a unitary shell having a top wall, opposed elongated side walls and end walls. A peripheral flange is formed about a free end of the side and end walls and defines a load supporting section and a connection section to permit interlocking with an adjacent pan and support of a load on the pans. The pans are of sufficient length to act as self supporting long beams to span spaced apart support beams which are normally held above a support surface by adjustable support posts.

Abstract: A method of and apparatus for making a self-supporting dome-like skeletal structure including the steps of preparing a substantially flat surface, assembling an array of multi-sided first members which is criss-crossed by paths comprising adjacent flanges of adjacent first members, placing a strip of pliable material along each path and interweaving the strips at intersections thereof, securing the ends of the strips, mounting over each first member a second member of configuration similar to said first member, said second members peripherally sealingly resting on the strips on the flanges of the first members, placing concrete in troughs having as sides the sides of adjacent second members and as bottoms the strips on the flanges of the first members and introducing pressurized gas below said array of first members to cause it to assume a dome-like configuration, allowing the concrete in the troughs to set and exhausting the gas from below the first members so as to strip at least said first members from the