Original tile trade vintage catalog for NATIONAL FIREPROOFING CORPORATION of Pittsburgh, PA. Manufacturers of Natco Structural Clay Tile. Pictured is the Jane Addams Housing Project in Chicago and US Navel Hospital in Philadelphia. Karcher & Smith, Architects. Natco Speed-A-Backer Tile, Speedwall Tile, Bulldog Stair Treds, Dek-Tile, Load-Bearing Speedtile. Disbound from a large 1938 construction equipment book, this unique old six page technical specification data brochure would make a wonderful addition to your retro design library.