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| End Treatments, Elbows, Tees |
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One of the benefits of corrugated steel pipe is that is can be easily and economically fabricated into an assortment of fittings. Structural plate fittings are shop cut from curved corrugated plates and welded together. These structures are usually assembled and bolted in the shop in a trial fit to assure that all parts mate properly. The parts are then clearly marked for field assembly. The principal purpose of end finish (or treatment) on corrugated steel pipe culverts or spillways is hydraulic efficiency – to prevent scour at the inlet, undermining at the outlet and to increase capacity. Other purposes may be to retain the fill slope, discourage burrowing rodents or improve safety.   Types of steel end treatments include:
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