At 12:20 PM 9/21/06, W7CE wrote:
>Do tower manufactures like US Tower rate their towers based on the 3-second
>gust, 10-minute average or hourly mean? I don't think I've ever seen a
>tower spec that indicated which one they are using.
Towers are typically spec'd according to EIA/TIA-222. Prior to the
current version (-G) , EIA/TIA-222 used "fastest mile" averaging for
wind speeds. "Fastest mile" is a wind speed dependent averaging
interval that is not the same as any of 3-second gust, 10-minute
average or hourly mean.
Michael Keane K1MK
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