Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Estimating Janka hardness from specific gravity for tropical and temperate species

    Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Michael C. Wiemann; David W. Green
    Date: 2007
    Source: Research Paper FPL-RP-643. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 21 pages.
    Publication Series: Research Paper (RP)
    Station: Forest Products Laboratory
    DOI: https://doi.org/10.2737/FPL-RP-643
    PDF: View PDF  (719 KB)

    Description

    Using mean values for basic (green) specific gravity and Janka side hardness for individual species obtained from the world literature, regression equations were developed to predict side hardness from specific gravity. Statistical and graphical methods showed that the hardness–specific gravity relationship is the same for tropical and temperate hardwoods, but that the relationship for softwoods is different from that for hardwoods. As expected, the relationship for green wood is different from that for wood at 12% moisture content.

    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

    Wiemann, Michael C.; Green, David W. 2007. Estimating Janka hardness from specific gravity for tropical and temperate species. Research Paper FPL-RP-643. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 21 pages.

    Cited

    Google Scholar

    Keywords

    Janka hardness, specific gravity, temperate hardwoods, tropical hardwoods, softwoods

    Related Search

    XML: View XML
Show More
Show Fewer
Jump to Top of Page
https://www.fs.usda.gov/treesearch/pubs/28975