Corrugated Metal
metal that has been corrugated to give it increased rigidity and power to resist buckling and collapse. The process is merely an application to metallic substances of the old contrivance of "goffering" or "piping," by means of which frills are stiffened and kept in shape. The metal to be corrugated is passed between pairs of with with ridged surfaces, the ridges ridg of one fitting into the hollows of the other, and the sheets or plates operated on are bent and compressed into the wavy outline of the rolls. Walls and roofs of light and temporary buildings are extensively made of corrugated galvanized ironi. e., sheet-iron first corrugated and subsequently coated with zinc by dipping the sheets into a bath of the liquid metal.