Research Article
Jul 1979
Press-Lam Timbers for Exposed Structures
Authors: John A. Youngquist, John L. Tschernitz, Russell C. Moody, Ronald W. Jokerst, and David S. Gromala, AM.ASCEAuthor Affiliations
Publication: Journal of the Structural Division
Volume 105, Issue 7
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 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 10 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.
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Information
Published In
Journal of the Structural Division
Volume 105 • Issue 7 • July 1979
Pages: 1405 - 1416
Copyright
© 1979 American Society of Civil Engineers.
History
Published in print: Jul 1979
Published online: Feb 1, 2021
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Authors
Affiliations
John A. Youngquist
Engr. Forest Products Lab., Forest Service, U.S. Dept. of Agriculture, Madison, Wisc.
John L. Tschernitz
Chemical Engr. Forest Products Lab., Forest Service, U.S. Dept. of Agriculture, Madison, Wisc.
Russell C. Moody
Engr. Forest Products Lab., Forest Service, U.S. Dept. of Agriculture, Madison, Wisc.
Ronald W. Jokerst
Forest Products Technologist, Forest Products Lab., Forest Service, U.S. Dept. of Agriculture, Madison, Wisc.
David S. Gromala, AM.ASCE
Engr. Forest Products Lab., Forest Service, U.S. Dept. of Agriculture, Madison, Wisc.
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.