Tilt up concrete wall panel system

Apparatus for forming concrete tilt up wall panels comprising a plurality of form pans, each having a surrounding flange portion, and having a central raised portion sloped downward to said flange portion around its sides, said flange portion having spaced holes therealong, a plurality of parallel spaced guide bars, each guide bar having upwardly projecting lugs uniformly spaced therealong, each of said pans being disposed across a plurality of said guide bars with said guide bar lugs received through said holes to position said pans, said flange portions of adjacent pans being overlapped and common ones of said lugs being received through said holes of said overlapped flange portions, selected ones of said guide bars extending across said pans beneath the central raised portions thereof, support members carried by said selected ones of said guide bars and extending upwardly therefrom into engagement with said central raised portion of said pans to support said pans, said pans defining troughs between said central raised portions, and above said flange portions, side frame members closely disposed along the sides of the outermost of said pans, end frame members closely disposed along the ends of the outermost of said pans, means connecting said side and end frame members to form a rectangular frame closely surrounding said pans and extending above said central raised portions and reinforcing bars extending along said troughs between said pans.