A Comparative Study of Distribution Structure Cross Arms

Ramana Pidaparti1, Sriram Kalaga2, *
1 School of Engineering, University of Georgia, Athens, Georgia, USA
2 Ulteig Engineers, Inc., St. Paul, Minnesota, USA

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© 2017 Pidaparti and Kalaga.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Ulteig Engineers, Inc., 4285 North Lexington Avenue, St. Paul, Minnesota 55126, USA, Tel: (651) 415 3873, Fax: (888) 858 3440; E-mail:



The structural performance of cross arms used on distribution poles is studied in this paper. Tangent and Dead End configurations involving conventional (wood) and composite (fiber glass) cross arms are analyzed. Strength-to-Stiffness and Weight-to-Stiffness ratios associated with study cases are determined and evaluated.

Results and Conclusion:

It is observed that although initial costs are higher, composite cross arms offer long-term advantages in terms of strength, stiffness, performance and durability.

Keywords: Composite, Cross arms, Dead ends, Distribution lines, Stiffness, Strength, Tangent, Wood.