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 (210 KB bytes)

Title: Effect of drilled holes on the bending strength of large dimension Douglas-fir lumber

Author: Falk, R.H.; DeVisser, D.; Plume, G.R.; Fridley, K.J.;

Date: 2003

Source: Forest products journal. Vol. 53, no. 5 (May 2003)

Publication Series: Miscellaneous Publication

Description: In this study, experimental bending tests were performed on nominal 4-by 8-inch (actual 89-mm by 191-mm)lumber members to determine how a notch and holes drilled in the wide face affect edge wise bending strength. Holes were drilled at the midspan in three locations relative to the edge. The results appear to justify an allowable hole one-half the allowable knot size that is currently permitted for cedar in No. 1 Beams & Stringer grade. Furthermore, the data indicate that hole location may be as important as hole size. A1-inch (25.4-mm)hole had about the same effect on strength as a 1-3/4-inch (44-mm) hole when the holes were 1 inch (25.4 mm)from the tension edge.

Keywords: Drilled holes, bending strength, Douglas-fir, lumber, strength

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:


Falk, R.H.; DeVisser, D.; Plume, G.R.; Fridley, K.J. 2003. Effect of drilled holes on the bending strength of large dimension Douglas-fir lumber. Forest products journal. Vol. 53, no. 5 (May 2003)

 


 [ 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.