Improvements in or relating to reinforced concrete linings for window and door openings in hollow or cavity walls of houses and other buildings

摘要

238,452. Robertson, L. Jan. 8, 1925. Girders.-Lintels consist of slabs i which have tongued and grooved or dowelled connection with upright slabs g and are provided with ribs m for engaging the cavity c of the wall and fillets e on the opposite side for the reception of the door or window frame. Metal-reinforcing members j may project into the cavity c, a concrete filling k being provided.