Laminar lost formwork and reinforcing element - has rolled longitudinal stringers and intersecting cross bands from sheet strips

摘要

For use as lost formwork and reinforcement in concrete or mortar surfaces, and elsewhere, such laminar elements are normally made from punched-out sheet metal, or assembled from round iron bars and sheet strips. Intrinsic rigidity is here enhanced by producing both the rolled longitudinal shaped-sections and the alternately bent cross bands from strips of sheet metal. The bent cross bands and the longitudinal stringers may be interconnected by spot welding, or by detachable latching connection, and the longitudinal stringers may be laterally lattice-shaped. The cross bands may have holes through which concrete or mortar can trickle, to promote improved bonding.