Specifications include, but are not limited to: The purpose of this Invitation for Bids is to obtain pricing from Vendors to furnish and deliver Corrugated Aluminum Pipe for the NC Department of Transportation. Pipe with helical corrugation shall have rerolled ends with a minimum of two (2) annular corrugations at each end. Two lifting lugs shall be provided with each section of pipe. Such lugs shall consist of a 3/4" dia. "U" bolt with a 3" x 1/4" x 15" plate connecting the legs of the "U" bolt. Holes for said lugs shall be either punched or drilled. No burning of holes shall be permitted. Welded lifting straps or lugs shall be prohibited. 8” fully threaded bolts and nuts, enough to cover all bolt holes in pipe and connecting bands.