Original roofing trade vintage catalog for STRUCTURAL GYPSUM CORPORATION. General office and factory was located in Linden, NJ. Manufacturers of Gypsteel Pre-Cast Roof and Floor, Partition Tile, Beam and Column Covering and Plasters. For apartments, hotels, office buildings, banks and churches. Suspension Long Span, Short Span and Assembled Slab Roofs. Unbound from a large 1931 architectural catalog, this unique old five page technical brochure would display beautifully matted and framed. A marvelous addition to your retro roofing construction library. Slight damp stain on outer edge.