Skip to page content
USDA Forest Service

Research & Development Treesearch

Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help - We Participate  Government Made Easy

Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (1.14 MB bytes)

Title: Drying southern pine at 240°F. -- effects of air velocity and humidity, board thickness and density

Author: Koch, Peter;

Date: 1972

Source: Forest Products Journal, Vol 22(9): 62-67

Publication Series: Miscellaneous Publication

Description: Kiln time to each 10 percent moisture content was shortened by circulating air at high velocity, but was little affected by board specific gravity. A wet-bulb depression of 80oF. provided faster drying than depressions of 40 or 115oF. At 80 depression and with air circulated at 930 f.p.m., kiln time was directly proportional to board thickness. Under these optimum conditions, 1 by 4's required 10.4 hours to reach 10 percent moisture content; boards 1.5 and 1.9 inches thick required 15.8 and 20.7 hours respectively. Total energy expanded in drying to 10 percent moisture content was affected by board thickness and specific gravity; air circulation velocity did no significantly affect total energy. Boards kilned for 24 hours at 240oF. and then overdried showed significant variation in shrinkage according to the drying schedule used. No significant modulus of rupture in bending, or toughness were detected in clear-wood specimens cut from lumber dried by the six 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.
  • 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.)



Koch, Peter 1972. Drying southern pine at 240°F. -- effects of air velocity and humidity, board thickness and density. Forest Products Journal, Vol 22(9): 62-67


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.