DESIGN AND FABRICATION OF THE SYLVAN OVERCROSSING HPS 70W BOX GIRDER BRIDGE

Due to increased congestion on the Sunset Highway (US Route 26) just west of Portland, the Oregon Department of Transportation (ODOT) needed to add another lane to the existing six-lane section. The widening project required replacement of the Skyline Road Overcrossing at the top of the Sylvan Hill (Sylvan Overcrossing). The replacement structure needed a minimum depth of superstructure and had to be able to be erected with the least traffic disruption. After study of various design alternatives, ODOT determined the use of High Performance Steel (HPS) 70W in a steel box girder bridge best met the needs of the project. The bridge has six box girders, three in each stage, for a total 80-ft roadway and two 18-ft sidewalks with planters. The single span is 205 ft. The design was optimized by using HPS 70W for the webs and flanges, and Grade 50W weathering steel for the stiffeners and diaphragms. The fabrication was done by Universal Structural Inc., Vancouver, Washington. This was the first use of HPS in their shop. The paper describes the differences in design and fabrication of HPS compared to conventional steels and provides detailed cost savings of HPS box girders with Grade 50W secondary members. The paper summarizes the benefits of HPS 70W.

• Supplemental Notes:
  • Page range: 13-1 through 13-10.
• Corporate Authors:

  National Steel Bridge Alliance

  1405 North Lilac Drive, Suite 212
  Golden Valley, MN  United States  55422-4528
• Authors:
  • Johnson, B
  • Seradj, H
• Conference:
  • 2001 World Steel Bridge Symposium
  • Location: Chicago, Illinois
  • Date: 2001-10-2 to 2001-10-5
• Publication Date: 2001

Language

• English

Media Info

• Features: Figures; Photos;
• Pagination: 10p

Subject/Index Terms

• TRT Terms: Box girder bridges; Bridge design; Construction; Cost effectiveness; Flanges; Steel; Stiffener plates; Structural diaphragms; Weathering steel; Webbing
• Uncontrolled Terms: High performance steel
• Geographic Terms: Portland (Oregon)
• Subject Areas: Bridges and other structures; Construction; Design; Highways; I24: Design of Bridges and Retaining Walls; I53: Construction of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00924143
• Record Type: Publication
• Files: TRIS
• Created Date: May 14 2002 12:00AM