scope:

Description: This work shall consist of furnishing, fabricating, and installing metal pipe, metal structural plate pipe, arches, pipe arches, and box structures in conformance with these specifications, the special provisions, and the details shown on the plans. As used in this specification, long-span structures are metal plate horizontal ellipse, inverted pear and multiple radius arch shapes as well as special shape culverts as defined in Division I, Section 12, "Soil-Corrugated Metal Structure Interaction Systems." The terms "metal pipe" and "metal structural plate pipe" shall include both circular pipe arch, underpass and elliptical shapes. "Metal structural plate arches" consist of a metal plate arch supported on reinforced concrete footings at its base (ends) with or without a paved invert slab. "Pipe arches" are constructed to form a pipe having an arch-shaped crown and a relatively flat invert. "Metal structural plate box structures" are conduits, rectangular in cross section, constructed of metal plates.