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Making the Grade

by Edward P. Wasserman, P.E., Dir. of Civ. Engrg.; Tennessee Dept. of Transportation, Nashville, TN,
Atorod Azizinamini, P.E., (M.ASCE), Assoc. Prof. of Civ. Engrg.; Univ. of Nebraska�Lincoln, Lincoln, NE; Chmn., ASCE Steel Bridge Committee,
Henry Pate, P.E., Civ. Engrg. Mgr.; Tennessee Dept. of Transportation, Nashville, TN,
William Greer, P.E., Civ. Engrg. Mgr.; Tennessee Dept. of Transportation, Nashville, TN,


Serial Information: Civil Engineering—ASCE, 1998, Vol. 68, Issue 4, Pg. 69-71


Document Type: Feature article

Abstract:

A new grade of high performance steel, HPS-70W, allows engineers to design tougher, lighter structures. The high performance weathering steel has a yield strength of 70 ksi, or 485 MPa. Created in 1995 in a collaboration between the Federal Highway Administration, the U.S. Navy, the American Institute of Steel Construction, the American Iron and Steel Institute and the American Welding Society, HPS-70W is tougher, easier to weld, and more crack resistant than conventional steel. The first completed projects using HPS-70W, the State Route 53 bridge in Tennessee and the Snyder South bridge in Nebraska, have shown HPS-70W to be an affordable and almost maintenance-free material with excellent strength characteristics applicable to a range of construction projects.

Subject Headings: Steel construction | Strength of materials | Infrastructure construction | Welding | Project management | Construction materials | Weathering

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