zinc-coated steel pipe for culverts, small bridges, conduits and storm sewers. No other drainage structure provides the range of structural strength that steel pipe does. It performs... Products... We carry a complete inventory of end sections, beveled culvert end treatments, elbows and risers. Engineered, shop-fabricated fittings speed installation and insure... culvert, or a developer constructing a storm sewer, Dub Ross Company stocks the products you need to complete your job. Beyond the Practical... Architects and builders around the world...