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    Author(s): James P. Wacker; Douglas M. Crawford; Merv O. Eriksson
    Date: 2003
    Source: Res. Note FPL–0289. Madison, WI : U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 2003. 17 pages.
    Publication Series: Research Note (RN)
    Station: Forest Products Laboratory
    PDF: View PDF  (2.0 MB)

    Description

    Environmental concerns about preservative bleeding (or migrating) from timber bridges have increased in recent years. This preliminary study examined the creosote retention levels at six timber highway bridges in Michigan's lower peninsula during the summer of 2000. Several test core samples were removed from the bridge superstructures (four bleeders and two controls) and were evaluated for creosote content in the laboratory. Results from three of the four bleeder bridges indicated high creosote retention levels between 36 and 52 lb/ft3 (576.7 and 833 kg/m3) after several years in service.

    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

    Wacker, James P.; Crawford, Douglas M.; Eriksson, Merv O. 2003. Creosote retention levels of timber highway bridge superstructures in Michigan’s Lower Peninsula. Res. Note FPL–0289. Madison, WI : U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 2003. 17 pages.

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    Keywords

    Timber, highway, bridge, red pine, creosote, retention, bleeding.

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