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. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Peter Koch
    Date: 1973
    Source: In: Proceedings, American Wood-Preserver's Association, Vol. 69: 123-140
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (2.96 MB)


    At dry-bulb temperatures above the boiling point of water, with large wet-bulb depressions and high air velocities, southern pine prodcuts can be dried quickly. In an impingement-jet kiln at 300o F., veneer 3/8-inch to 5/8-inch thick can be brought to 10 percent moisture content in 40 to 75 minutes. Drying times for lumber arte linearly related to thickness, e.g., at dry- and wet-bulb temperatures of 240o and 160o F., time required is 10.4, 15.8 and 20.7 hours for thickness of 1.0, 1.5, and 1.9 inches. Under similiar conditions, planks or timbers 2, 3, and 4 inches thick can be dried to 10 percent moisture content in 22.4, 35.6, and 45.3 hours; surface checks in timbers so dried are absent or minor, but in 3- and 4-inch pieces end-checking may be moderate to severe. at 225o F., with 50o wet-bulb depression, poles 8 to 10 inches in diameter can be reduced to 30 percent moisture in about 44 hours.

    Publication Notes

    • You may send email to to request a hard copy of this publication.
    • (Please specify exactly which publication you are requesting and your mailing address.)
    • 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.


    Koch, Peter. 1973. High-temperature kilning of southern pine poles, timbers, lumber, and thick veneer. In: Proceedings, American Wood-Preserver''s Association, Vol. 69: 123-140

    Related Search

    XML: View XML
Show More
Show Fewer
Jump to Top of Page