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RE: Tornadic Gust Wind Speeds vs Seismic

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Ed Marshall wrote:

. > Keep in mind that the ASCE 7-95 map of Tornadic Gust Wind Speeds
. > is for wind speeds exceeding 200 mph.  The wind speeds of most tornadoes
. > are much less but still exceed the code required design wind speeds.


The map that I am looking at (Figure C6-1A, page 157, ASCE 7-95) shows 
tornadic gust wind speeds of 100, 150 and 200 mph and the caption states 
that it is for a mean recurrence interval of 100,000 years.

A. Roger Turk, P.E.(Structural)
Tucson, Arizona