Original concrete trade vintage catalog for HAYDITE MANUFACTURERS ASSOCIATION. Main office was located at 718 Scarritt Building, Kansas City, MO. Manufacturers of Lightweight shale aggregate or burned clay, specially for use in concrete in place of sand, gravel, stone or other material. Disbound from a large 1933 construction equipment book, this unique old one page technical specification brochure would display beautifully matted and framed. Would make a marvelous addition to your retro industrial engineering library. Light damp stain on top and bottom edges.