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)
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Corporate Authors:
Forest Products Laboratory
P.O. Box 5130, North Walnut Street
Madison, WI United States 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
- TRT Terms: Bridge design; Bridges; Building materials; Field tests; Laminated wood; Laminates; Lumber; Stringers; Structural design; Supply; Timber; Timber construction; Wood preservatives; Wooden bridges
- Uncontrolled Terms: Veneers
- Old TRIS Terms: Glued laminated bridge stringers; Laminated stringers; Timber supply
- Subject Areas: Bridges and other structures; Design; Geotechnology; Highways; Materials; I24: Design of Bridges and Retaining Walls;
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