A research program on timber bridges is reported which covers evaluations of existing bridges, laboratory evaluations of new or revised design criteria and studies of experimental bridges in the field, and has as its objectives the development of design methods, better methods of preservative treatment of bridge members, improvement of deck systems, and the improvement of methods to provide a watertight seal and wearing surface for the deck. Research has indicated the possibility of glue- laminating dimension lumber into panel sections, making the deck more resistant to penetration of water. Glued panels are also stiffer and have higher load capacities than equivalent thicknesses of nailed assemblies. Comments are made on the width of such pannels, and on the performance evaluation of experimental test decks. Two- and three-hinged timber arches have been used to support long, clear-span bridges. A new design concept is described where glue-laminated deck panels were laid lengthwise to the loadway and no stringers were required under the deck.

  • Corporate Authors:

    American Wood Preservers Institute

    1651 Old Meadow Road
    McLean, VA  United States  22101
  • Publication Date: 0

Media Info

  • Features: Photos;
  • Pagination: 5 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00153013
  • Record Type: Publication
  • Report/Paper Numbers: 71
  • Files: TRIS
  • Created Date: Jul 19 1977 12:00AM