Accession Number : ADA080871


Title :   Design, Fabrication, Testing, and Installation of a Press-Lam Bridge.


Descriptive Note : Forest Service research paper,


Corporate Author : FOREST PRODUCTS LAB MADISON WI


Personal Author(s) : Youngquist,J A ; Gromala,D S ; Jokerst,R W ; Moody,R C ; Tschernitz,J L


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a080871.pdf


Report Date : Jan 1979


Pagination or Media Count : 24


Abstract : 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)


Descriptors :   *SHEETS , *BRIDGES , *STRUCTURAL COMPONENTS , *LAMINATED PLASTICS , STRESSES , THICKNESS , MECHANICAL PROPERTIES , LABORATORY TESTS , PRODUCTION , PROCESSING , EXPERIMENTAL DESIGN , FABRICATION , PROTOTYPES , INSTALLATION , ADHESIVE BONDING , DESTRUCTIVE TESTS , PRESSING(FORMING) , COLD WORKING


Subject Categories : Laminates and Composite Materials
      Plastics
      Civil Engineering


Distribution Statement : APPROVED FOR PUBLIC RELEASE