Abstract: A building construction comprising spaced parallel structural members, such as rolled steel beams and girders, forming a plurality of horizontally disposed structural bays in which the compression flanges of the girders are restrained against lateral displacement or buckling under compressive loads by concrete joists having notched end portions, especially during construction and prior to hardening of concrete poured thereover to form floor slabs. The joists are supported by, and extend transversely between, the girders. Adjacent end portions of the joists are connected to each other to form continuous lines of tension or compression ties at selected intervals along the girders. In a preferred embodiment, the continuous ties terminate at horizontal trusses formed at the end of a row of bays by at least one diagonally disposed truss member, such as a cable.

Abstract: A reusable, longitudinally adjustable, readily removable form support member for supporting a concrete construction form in an array of structural members in a building construction. In one embodiment the form support member comprises a spanning member having laterally translatably support pin members secured in recesses in opposed ends of the spanning member for engaging openings in adjacent structural members. The support pins may be movable in a horizontal plane so as to permit their alignment with the structural openings where necessary. The support pin members include block means attached to the rear portions of the support pins, the block means cooperating with respective activating means to move the spanning member in a vertical plane so that an inside surface of the respective end parts of the spanning member contacts a surface of the block means and effect a friction bond which prevents longitudinal movement of the respective parts.