Typically the (assumed) conversion from 50 year wind loads to 10 year wind
i.e. Wind Pressure (10 yr) = 0.75 x Wind Pressure (50 yr)
<== note these are pressures and not velocities ==>
You didn't really mention usage, but 10-yr winds are typically used for
serviceability criteria (deflection/sidesway) and 50-yr winds are used for
stress/strength design criteria.
Greg Effland, P.E.
From: richard lewis [mailto:rlewistx(--nospam--at)juno.com]
Sent: Thursday, March 08, 2001 3:35 PM
Subject: 10 Year Wind Conversion
I am looking for the conversion factor of changing the 50 year wind load
to the 10 year wind load. ASCE 7-95 has a conversion factor in the
Commentary for their wind loads. My problem is I am using ASCE 7-93
which is a different wind load. My wind speed is 80 MPH (fastest mile).
ASCE 7-95 is based on 3 sec. gust. Can anybody give me the conversion
factor of 50 year wind to 10 year wind using fastest mile criteria?
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