Abstract: Multipurpose concrete form panels are constructed using cross stiffener members for resistance to deflection under load. Each of the cross stiffener members is formed of a base strip of metal with a pair of parallel ribs of hat section extending therefrom and joined to opposite side rails of the form panel. Bores for connecting pins extend through the side rails to join the panels side by side to form a wall or, using a corner form, to form a column. Bores through the side rails are positioned between the cross stiffener members and between the ribs in each pair of ribs for joining the side rails together with continuity of the cross stiffener members for maximum dispersal of stress. Holes for wall ties extend through the face of the form panel and between the ribs in each pair of ribs. Fasteners for the ends of the wall ties engage the pairs of ribs to disperse localized stress.

Abstract: Multipurpose concrete form panels are constructed using cross stiffener members for resistance to deflection under load. Each of the cross stiffener members is formed of a base strip of metal with a pair of parallel ribs of hat section extending therefrom and joined to opposite side rails of the form panel. Rail stiffener strips are fastened to the side rails on alternate sides of the rail for added rigidity. Bores for connecting pins extend through the side rails to join the panels side by side to form a wall or, using a corner form, to form a column. Bores through the side rails are positioned between the cross stiffener members and between the ribs in each pair of ribs for joining the side rails together with continuity of the cross stiffener members for maximum dispersal of stress. Holes for wall ties extend through the face of the form panel and between the ribs in each pair of ribs. Fasteners for the ends of the wall ties engage the pairs of ribs to disperse localized stress.

Abstract: An elongated form tie bar extends transversely across a concrete receiving space between facing side forms and has opposite end portions thereof each positioned between respective abutting side edge portions of adjacent side forms. The end portions of the tie bar are each adapted to receive respective form holding members for retaining the abutting side edge portions of adjacent side forms in abutting engagement. The tie bar is of carbon steel and has hardened fracture planes positioned relative to the opposite end portions and an intermediate portion thereof whereby after setting of the concrete wall and removal of the forms the end portions are adapted to be separated from the intermediate portion upon being struck a blow as by a hammer and the ends of the remaining intermediate portion are recessed in the concrete wall.