The results of a 15-month monitoring program of a red oak stress-laminated timber bridge are evaluated. The bridge is the first of its kind in the state of Rhode Island and one of the earliest of its type constructed of red oak in the United States. The monitoring program included inspecting the bridge periodically, reading the load cell, measuring the wood moisture content, and recording the ambient temperature and relative humidity at the bridge site. The evaluation demonstrates that additional design factors may need to be considered before red oak is completely accepted as a construction material for stress-laminated bridges. Specifically, the monitoring program revealed fluctuations in the wood moisture content, and ambient temperature affected the stress levels in the steel rods to an extent that these factors may need to be considered in the design of this type of bridge. The loss of the initial rod stresses in the bridge were investigated; these losses correlated very well with exponential functions. The exponential functions are used to predict when and if the bridge will have to be restressed to maintain the design minimum stress levels.


  • English

Media Info

  • Features: Figures; Photos; References;
  • Pagination: p. 188-194
  • Monograph Title: Steel, concrete, and wood bridges
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00711807
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Sep 25 1995 12:00AM