Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help
 

Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

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

Publication Information

View PDF (147 KB bytes)

Title: Evaluation of small-diameter ponderosa pine logs in bending

Author: Larson, Debra; Mirth, Richard; Wolfe, Ronald;

Date: 2004

Source: Forest products journal. Vol. 54, no. 12 (Dec. 2004): Pages 52-58

Publication Series: Miscellaneous Publication

Description: Ninety-nine roundwood bending specimens were tested over the course of seven months beginning in early 2002 at the College of Engineering and Technology at Northern Arizona University in Flagstaff, Arizona. These specimens were taken from 5.0- to 12.7-inch diameter at breast height ponderosa pine trees cut during the summer of 2001 from Unit 16 of the Fort Valley Ecosystem Restoration Project located in wildland-urban interface of the Coconino National Forest. The specimens were sorted into two groups as a function of processing: hand-debarked logs known as tapered specimens and machine peeled logs known as uniform specimens. Each group of tapered and uniform logs contained both butt and tip specimens. This work provides evidence of relationships between juvenile wood and roundwood strength and stiffness. Failure mode in bending was also affected by juvenile wood. This work also shows that processing a tapered log down to a uniform log of constant diameter reduces bending strength and stiffness while increasing the percent juvenile wood in the cross section. Regardless of processing, butt logs in bending were stronger and stiffer than tip logs.

Keywords: Ponderosa pine, small-diameter logs, bending strength, roundwood, stiffness

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.

XML: View XML

Citation:


Larson, Debra; Mirth, Richard; Wolfe, Ronald 2004. Evaluation of small-diameter ponderosa pine logs in bending. Forest products journal. Vol. 54, no. 12 (Dec. 2004): Pages 52-58

 


 [ 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.