Abstract: A frame for supporting vertical loads and an aluminum tubular leg for such frame is disclosed. The legs are joined by a brace arrangement and connectors are used for mechanically connecting the brace arrangement to the legs for stabilizing the legs when under load. Each of the legs has spaced portions which are substantially symmetrical about a plane containing the longitudinal axes of the frame legs and which provide areas for mechanical connection of the brace arrangement to the leg. Such mechanical connection of the frame provides a versatile frame which may be used in concrete forming work and which may be readily repaired.

Abstract: A clamp arrangement for use in interconnecting structural members such as those used in scaffolding and shoring framework comprises two clamps which can be interconnected for either rotation between the clamps or fixed positioning of the clamps in at least one predetermined position. The clamps in the area of interconnection have portions which are adapted to be secured to position the clamps in the corresponding predetermined fixed relative position. A securing device cooperates with the clamp portions for securing them to fix the clamps in the corresponding predetermined relative position.

Abstract: A lifting device for use in association with concrete forming structures is provided. The lifting device has a pair of jaws, mounted on an axle, with a lifting lug associated with one of the jaws and a handle associated with the other of the jaws so that the other jaw may be hingedly moved relative to the first jaw. A spring loaded locking pin is provided to lock the second jaw in either an open or closed position, relative to the first position. The locking pin and the handle are each operable from above the lifting device. The inner ends of each of the hook-like jaws are rounded so as to specifically match the root configuration between the web and top flange of an upper chord of a truss, or other component of a concrete forming structure intended to be lifted using the lifting device of the present invention.