Abstract
Self-supported direct-embedded poles are widely used by the utility industry in the United States to support high-voltage transmission lines. For a typical transmission pole, the lateral loads caused by wind and ice loadings govern the design of the pole and foundation. Recent research findings reveal that the methods used in current practice do not yield consistently reliable pole foundation embedment depths in all soil types and for all possible pole classes, lengths, species, and pole loading scenarios. In order to generate improved design methods for transmission pole foundations, validated methods for analyzing laterally loaded piles have been incorporated into the current study. New reliable methods to design safe and cost-effective transmission pole foundations, incorporating both soil and pole properties, are proposed and recommendations are made in rigorous and simplified forms such that they can be easily adopted for use in the utility industry. This study found that the current methods for dete...
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