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Design/Engineering

Design and Engineering for Wood Poles

Engineering for Poles

Preservative-treated wood utility poles are essential to the North American electricity distribution system. Each pole serves as an engineered structure, supporting considerable weight from power lines, transformers, co-axial cable, fiber optic cable and other loads.

Standards that define the quality, dimensions and basic engineering data for preserved wood poles were first written in the early 1900s. Design values for wood poles have been refined over the decades by testing and an extensive record of in-place performance under rigorous conditions.

Review and download the following engineering reference materials and design tools for your computer, smartphone and tablet. Please note the American National Standards Institute (ANSI) maintains the basic standards for wood poles and crossarms, which must be purchased directly from ANSI.

Engineering & Design

ANSI_Dim ANSI Dimensions for Wood Poles
Excel spreadsheet that calculates the minimum circumference of a wood pole 6 ft. from the butt, based on selection of species, class and length. Requires Excel 2007 or higher.
ZIP file (151KB), 03/14

Get this tool for your smartphone or tablet!
Download the free Wood Pole Guide app.
PDF
Pole_Weight Wood Pole Weight Estimator
Excel spreadsheet that calculates range of pole weights for shipping based on selection of species, class and length. Includes estimators for single poles and multiple pole selections. Requires Excel 2007 or higher.
ZIP file (115KB), 03/14

Get this tool for your smartphone or tablet!
Download the free Wood Pole Guide app.
PDF
O51 ANSI O5.1-2015 - Wood Poles, Specifications and Dimensions
FOR PURCHASE ONLY. The minimum specifications for the quality and dimensions of preserved wood poles that are to be used as single-pole utility structures.
Buy for $50 at ANSI eStandards Store
PDF
O53 ANSI O5.3-2015 - Solid Sawn Wood Crossarms and Braces
FOR PURCHASE ONLY. Specifications covering solid sawn-wood crossarms and braces manufactured from coastal Douglas fir and Southern Pine. The specifications are intended to cover communications crossarms, power crossarms, heavy-duty crossarms, and heavy-duty braces.
Buy for $50 at ANSI eStandards Store
PDF
Pole2005 Technical Bulletin - Wood Pole 2005: Design Considerations
Overview of wood pole design criteria and the National Electric Safety Code, with review of loading zones, strength and ultimate resisting moment comparisons with equivalent steel and concrete poles.
12 pages, 03/05
PDF
Equiv Technical Bulletin - Wood Equivalent Poles and the 2002 NESC
Discussion of the changes in the 2002 NESC that altered the strength relationship between wood and metal poles, which may create potential problems in misapplication of the product.
8 pages, 06/03
PDF
ANSI_NESC ANSI - NESC Update
Review of wood pole strengths and related issues, presented at the 2005 AWPA Annual Meeting by ANSI O5 Committee Chairman Nelson Bingel.
48 pages, 05/05
PDF
X Wood Pole Specification Update
Discussion of the re-evaluation of fiber stress values for wood poles under the ANSI O5.1 Wood Pole Specification, by ANSI O5 Committee Chairman Nelson Bingel.
5 pages, 01/02
PDF
SReview Review of Wood Pole Strengths
A 2004 presentation by Martin Rollins, P.E. for the Purchasing Management Association of Oklahoma Electric Cooperatives.
33 pages, 06/04
PDF
JuvyWood Juvenile Wood Concerns in Southern Yellow Pine Poles
Statement addressing juvenile wood concerns and the impact on strength of treated Southern Yellow Pine poles.
1 page, 04/04
PDF