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    Author(s): James C. Ward; Del Shedd
    Date: 1979
    Source: Research Paper FPL-RP-344. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 14 pages
    Publication Series: Research Paper (RP)
    Station: Forest Products Laboratory
    PDF: View PDF  (347 KB)

    Description

    It is often difficult to kiln dry California black oak lumber green from the saw without developing excessive degrade from honeycomb, ring failure, and collapse. Results from this study indicate that defect-prone lumber contains heartwood that was infected and weakened by anaerobic bacteria in the living tree. Green, bacterially infected boards should be segregated and dried to 20 percent moisture content (MC) under mild air-drying conditions or by low temperature, forced air-drying schedules. The percent MC lumber can then be kiln dried to end-use MC without additional defect. Boards with normal, noninfected heartwood can be successfully kiln-dried green from the saw under conventional schedules.

    Publication Notes

    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Ward, James C.; Shedd, Del. 1979. California black oak drying problems and the bacterial factor. Research Paper FPL-RP-344. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 14 pages

    Keywords

    Surface checking, checking, kiln drying, drying, Quercus kelloggii, seasoning, air drying, California black oak, bacteria, anaerobic bacteria, honeycombing, splits, shrinkage, warping, heartwood, biodegradation

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