DESIGN, FABRICATION, TESTING, AND INSTALLATION OF A PRESS-LAM BRIDGE. FOREST SERVICE RESEARCH PAPER

Parallel laminated veneer (PLV) products are manufactured by adhesive bonding of rotary-peeled veneer. It has been estimated that a production line PLV process could convert green logs into a finished structural laminate in less than an hour. Press-Lam, a PLV product under investigation at the U.S. Forest Products Laboratory, has exhibited decreases in variability of mechanical properties and increases in chemical preservative penetration and retention when compared to solid-sawn lumber. A prototype highway bridge constructed entirely of Press-Lam has been erected by the Virginia Department of Highways and Transportation. This bridge was field tested to its AASHTO HS-20 design load. Preliminary allowable stresses were determined by data obtained from destructive laboratory tests on 18 full-scale stringers and 6 sections of decking made from Douglas-fir Press-Lam. In the face of dwindling supplies of large structural timbers, PLV products are attractive alternatives for exposed structural applications. (Author)

  • Corporate Authors:

    Forest Products Laboratory

    P.O. Box 5130, North Walnut Street
    Madison, WI  USA  53705
  • Authors:
    • Youngquist, J A
    • Gromala, D S
    • Jokerst, R W
    • Moody, R C
    • Tschernitz, J L
  • Publication Date: 1979

Media Info

  • Pagination: 24 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00313709
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FSRP-FPL-332
  • Files: TRIS
  • Created Date: Jun 26 1980 12:00AM