Original concrete trade vintage catalog for THE WARING-UNDERWOOD COMPANY of Fernwood, PA. Manufacturers of Ideal Expansion Joint. Description and uses, advantages and specs are provided. It's a premoulded strip of asphalt, especially designed to take care of the expansion in brick, wood black, granite black and concrete paving, and to act as protection against expansion in concrete foundations. Disbound from a large 1916 engineering book, this unique old one page technical specifications brochure would display beautifully matted and framed. Contains a small amount of residual glue on edge.