Original wall trade vintage catalog for UNITED STATES GYPSUM COMPANY. Area Separation Walls. USG sheetrock, drywall. Numerous images, illustrations, and detailed topics include product descriptions, fire ratings, function & utility, cavity & solid type walls. Architect specifications provided. Unbound from a large 1982 architectural catalog, this unique old four page technical brochure would display wonderful matted and framed. A terrific addition to your retro wall construction library. Pages are detached and may contain a small amount of residual glue on edge. (Systems folder SA-925).