Original metal trade vintage catalog for JONES & LAUGHLIN STEEL CORPORATION. Main office was located in Pittsburgh, PA. Manufacturers of Junior Beams. Skyscraper construction for building with junior beams. Used in high schools, office buildings, hospitals, homes and apartments. Junior Beam supported floors and roofs mean less maintenance and repair, greater protection from fire and lower insurance protection from termites and vermin, a longer lasting and sounder investment. A Table of Spacings is provided. Unbound from a large 1954 architectural catalog, this unique old four page technical specification brochure would display beautifully matted and framed. Nice cover graphics. A fantastic addition to your retro metal library.