1994 AASHTO Isotach wind map Supplemental guide

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1994 AASHTO Isotach wind map (ASCE 7-93 “fastest mile” wind map) The 50-year mean recurrence Isotach wind map below shows windspeed measurements for various regions in the United States, including Alaska, Hawaii and Puerto Rico. This map is for general guidance only and is not a replacement for professional judgement when selecting a pole for installation in a specific geographic location.