Abstract
This paper discusses ASCE 74, IEC 60826, and NESC (Rule 250C) extreme wind load methodologies applied to transmission line towers and conductors. The application of these methods can result in varying loads applied to towers and conductors. The wind parameters used and some of the differences between these wind loads methods will be discussed. This information will help utilities to better understand the limitations and assumptions used to determine design wind loads on transmission line conductors and towers. Comparison of wind load results performed by the CEATI International, Inc., using the ASCE 74, IEC 60826, and the NESC methods are presented. Also presented are issues that should be investigated to develop or enhance future wind load methods.
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