Abstract
The No.9119 typhoon which was very strong, 940 HPa, and ran through the Japan Islands longitudinally during 26-28th September 1991, caused unprecedented damages in transmission lines in West Japan. Immediately, electric power utilities organized a committee to investigate the cause and to take measures against local wind effected by topography, and asked Central Research Institute of Electric Power Industry (CRIEPI) to carry out the studies on the local wind resistance design of transmission tower-conductor systems. The purpose of this paper is to describe the summary of the investigation results and to show the outline of "Recommendations for local wind load on transmission towers - a draft".
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