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 (362 KB bytes)

Title: Derivation of nominal strength for wood utility poles

Author: Wolfe, Ronald W.; Bodig, Jozsef; Lebow, Patricia;

Date: 2001

Source: Gen. Tech. Rep. FPL-GTR-128. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 11 p.

Publication Series: General Technical Report (GTR)

Description: The designated fiber stress values published in the American National Standards Institute Standard for Poles, ANSI 05.1, no longer reflect the state of the knowledge. These values are based on a combination of test data from small clear wood samples and small poles (<55 ft (<17 m)) and field experience up to the time of adoption of the standard in 1965. A number of changes over the past 35 years require that the wood pole industry update the basis for the ANSI fiber stress values if it is to maintain a lead role in the utility pole market. Changes that will impact wood pole design include new data for larger wood poles, increased pressure from competing materials, and the evolving transition form Allowable Stress Design (ASD) to a reliability-based Load and Resistance Factor Design (LRFD) format. This paper presents an approach to updating the basis for deriving fiber stress values for wood poles, which will provide uniform reliability across class sizes as well as species. We review the current basis for ANSI fiber stress values and recent pole test data. Our work suggests that adjustments such as those for load sharing and moistrue effects be considered load factors rather than material factors and recommend a method of calibrating the new LRFD format the ASD approach.

Keywords: Standard, wood, utility, poles, load and resistance factor design, LRFD, nominal resistance

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:


Wolfe, Ronald W.; Bodig, Jozsef; Lebow, Patricia 2001. Derivation of nominal strength for wood utility poles. Gen. Tech. Rep. FPL-GTR-128. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 11 p.

 


 [ 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.