The use of permanent steel forms for bridge deck construction has been encouraged recently by its acceptance in the Federal highway program and by revisions in many state codes. The reported advantages of this method of construction include savings in erection time, simplicity of construction and worker safety. The permanent bridge deck form is a corrugated form made of hot-dipped, galvanized steel sheet, with a coating class of two ounces of zinc per square foot. The form is available in a number of gauges, with widths ranging from 24 to 30 inches; lengths are made in sizes up to 9 and one-half feet. The variety of available rib spacings can accommodate various pitches, a term which refers to the spacing between the steel reinforcing bars. Steel forms are furnished with closed end flutes or with channel closures to provide a grout-tight construction. The forms are erected after the bridge's superstructure is completed. Laying of the forms is a three-step procedure. Support angles are welded to supporting girder beams, except in flange tension zone. The steel forms are positioned to fill the gap between the beams, and then attached securely to the angles with self-tapping screws. After the forms are in place reinforcing bars are added. In some states, the spacings of the corrugations in the forms coincide with the reinforcing bar spacing. In other states, the pitch and bar spacing are independent of each other. Placement of the concrete completes the basic bridge deck. The permanent forms help retain moisture in the concrete, contributing somewhat to the curing process. The permanent nature of these forms eliminates the form stripping operation and the need for scaffolding.