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  1. Strength of log bridge stringers after several year’s use in southeast Alaska

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    Author(s): Russell C. Moody; R.L. Tuomi; W.E. Eslyn; F.W. Muchmore
    Date: 1979
    Source: Research Paper FPL-RP-346. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 4 pages
    Publication Series: Research Paper (RP)
    Station: Forest Products Laboratory
    PDF: View PDF  (58 KB)

    Description

    Bending tests of 28 untreated log stringers from 12-year-old native timber bridges in southeast Alaska showed significant reductions in strength due to decay. Compared to results on fresh logs, strength reduction was about 25 percent, and could be predicted based on the loss in section modulus due to decay. Log stiffness was not significantly affected. Results will be helpful to engineers with responsibility of rating the load capacity of bridges having untreated log stringers.

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Moody, Russell C.; Tuomi, R.L.; Eslyn, W.E.; Muchmore, F.W. 1979. Strength of log bridge stringers after several year’s use in southeast Alaska. Research Paper FPL-RP-346. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 4 pages

    Keywords

    Picea sitchensis, roundwood, logs, strength, wooden bridges, stringers

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