FIELD PERFORMANCE OF TIMBER BRIDGES: 9. BIG ERICK'S STRESS-LAMINATED DECK BRIDGE

The Big Erick's bridge was constructed during September 1992 in Baraga County, Michigan. The bridge is 72 ft (22 m) long, 16 ft (5 m) wide, and consists of three simple spans: two stress laminated deck approach spans and a stress laminated box center span. The bridge is unique in that it is one of the first known stress laminated timber bridge applications using Eastern Hemlock sawn lumber and a combination of stress laminated decks and a stress laminated box in a single bridge. Performance of the bridge was monitored for 35 months, beginning at the time of installation. Monitoring involved gathering and evaluating data relative to the moisture content of the wood components, the force level of stressing bars, and the behavior of the bridge under static load conditions. In addition, comprehensive visual inspections were conducted to assess the overall condition of the structure. Based on field evaluations, the bridge is performing well, with only minor serviceability deficiencies.

  • Corporate Authors:

    Forest Products Laboratory

    USDA Forest Service, One Gifford Pinchot Drive
    Madison, WI  United States  53726-2398
  • Authors:
    • Kainz, J A
    • Wacker, J P
    • Nelson, Mark
  • Publication Date: 1996-11

Language

  • English

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 24 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00765360
  • Record Type: Publication
  • Report/Paper Numbers: FPL-RP-552
  • Files: TRIS
  • Created Date: Jun 20 1999 12:00AM