Research Article
Dec 1982
Forest Service Timber Bridge Specifications
Publication: Journal of the Structural Division
Volume 108, Issue 12
Abstract
Approximately one half of the 12,000 Forest Service road and trail bridges are constructed of wood or have wood as a major component. The number constructed each year fluctuates with the cost of timber and the complexity of the individual bridges. The typical Forest Service road bridge is a pressure treated, single span, single lane, 40 ft. long structure with timber abutments, glu-lam or solid sawn stringers, laminated deck, timber curbs and rail posts, and a steel deep beam railing. Design, with minor exceptions such as truck loadings and railing, is in accordance with the AASHTO Standard Specifications for Highway Bridges. Installation is controlled by Forest Service Standard Specifications for Construction of Roads and Bridges. The specifications are quite similar to the FP-79 specifications developed by the Federal Highway Administration. There are regional differences depending on availability of construction materials and on the environmental conditions.
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Information
Published In
Journal of the Structural Division
Volume 108 • Issue 12 • December 1982
Pages: 2737 - 2746
Copyright
© 1982 American Society of Civil Engineers.
History
Published in print: Dec 1982
Published online: Feb 1, 2021
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Authors
Affiliations
Lawrence D. Bruesch, M.ASCE
Asst. Staff Dir., Engrg., Forest Service Northern Region, Missoula, Mont.
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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.