Return to index: [Subject] [Thread] [Date] [Author]

RE: ASCE Wind Speed Criteria

[Subject Prev][Subject Next][Thread Prev][Thread Next]
Been there many times.  Try international work where the WMO uses 10 minute
mean extreme wind.  Or compare for tornadic winds which are 1/4 mile winds.
Or hurricane winds which are "sustained" 1 minute winds.

Harold O. Sprague

> -----Original Message-----
> From:	Paul Feather [SMTP:pfeather(--nospam--at)]
> Sent:	Wednesday, June 27, 2001 11:38 AM
> To:	SEAOC List
> Subject:	ASCE Wind Speed Criteria
> We are currently consulting for a project outside of California.  The code
> requirement specified is ASCE 7-95, but the jurisdiction supplied wind
> speed requirements are lower than the wind speeds indicated as appropriate
> in the ASCE map.
> The perception we are getting is that many jurisdictions have adopted the
> latest ASCE code without understanding the shift from fastest mile to
> three second gust wind speed requirements.  Application of 100 mph fastest
> mile to the three second gust requirements will result in considerably
> lower than intended force levels.
> We do not have a problem with this project other than the owners eyes
> glazing over as we endeavor to explain the differences between three
> second gust and fastest mile wind speeds and why it is appropriate to
> design for higher wind speed requirements than the jurisdiction specified.
> But I thought the experience interesting, and am curious if others are
> encountering similar situations.
> Paul Feather
> San Diego, CA

******* ****** ******* ******** ******* ******* ******* ***
*   Read list FAQ at:
*   This email was sent to you via Structural Engineers 
*   Association of Southern California (SEAOSC) server. To 
*   subscribe (no fee) or UnSubscribe, please go to:
*   Questions to seaint-ad(--nospam--at) Remember, any email you 
*   send to the list is public domain and may be re-posted 
*   without your permission. Make sure you visit our web 
*   site at: 
******* ****** ****** ****** ******* ****** ****** ********