Need a book? Engineering books recommendations...

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

Re: Katrina emergency response

[Subject Prev][Subject Next][Thread Prev][Thread Next]
I haven't had a chance to look at the NOAA site, but did d/l the wind data from FEMA.  Just looking at the two .jpg files was quite enlightening. If the windspeeds shown are accurate, there should be a lot of accounting in MS and AL, as the winds were high, but not above the published speeds in ASCE-7.   It does appear the NO took a direct hit, and had windspeeds  5-10mi on either side of the storm track that were 15-20mph above the published 50 year data, though most of that was inland.  It looks like Katrina was above the design criteria for a swath about 50 miles wide and 200-300 miles long, thogh most strucutres should have held except where the winds were 10-15+mph above the design.

I was interested to note that the windspeed at the superdome looks to have been 135-145MPH. If you take the worst case speed around there at 150mph and take the square, you get about 1.15x force. Interesting that for a strucutre of that size, the I factor would have been 1.15.

Thanks to both Jim and Harold for the links.

Jim Hannah wrote:
As an alternative you might also want to review the NOAA surface wind speed
maps from the following source:

http://www.aoml.noaa.gov/hrd/index.html

They have a whole library of surface wind maps for several years including
all of Florida's Hurricanes during last year.

Thanks,  Jim Hannah


----- Original Message ----- 
From: "Harold Sprague" <spraguehope(--nospam--at)hotmail.com>
To: <seaint(--nospam--at)seaint.org>
Sent: Wednesday, September 07, 2005 3:18 PM
Subject: RE: Katrina emergency response


  
For those who are technically inclined, you may want to take a look at the
preliminary FEMA wind velocity maps at:
http://www.floodmaps.net/eftp/checkfile.asp?file=FA27_ARA27c.zip

Regards,
Harold Sprague

_________________________________________________________________
FREE pop-up blocking with the new MSN Toolbar - get it now!
http://toolbar.msn.click-url.com/go/onm00200415ave/direct/01/


******* ****** ******* ******** ******* ******* ******* ***
*   Read list FAQ at: http://www.seaint.org/list_FAQ.asp
*
*   This email was sent to you via Structural Engineers
*   Association of Southern California (SEAOSC) server. To
*   subscribe (no fee) or UnSubscribe, please go to:
*
*   http://www.seaint.org/sealist1.asp
*
*   Questions to seaint-ad(--nospam--at)seaint.org. 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: http://www.seaint.org
******* ****** ****** ****** ******* ****** ****** ********

    


******* ****** ******* ******** ******* ******* ******* ***
*   Read list FAQ at: http://www.seaint.org/list_FAQ.asp
* 
*   This email was sent to you via Structural Engineers 
*   Association of Southern California (SEAOSC) server. To 
*   subscribe (no fee) or UnSubscribe, please go to:
*
*   http://www.seaint.org/sealist1.asp
*
*   Questions to seaint-ad(--nospam--at)seaint.org. 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: http://www.seaint.org 
******* ****** ****** ****** ******* ****** ****** ******** 



  
******* ****** ******* ******** ******* ******* ******* *** * Read list FAQ at: http://www.seaint.org/list_FAQ.asp * * This email was sent to you via Structural Engineers * Association of Southern California (SEAOSC) server. To * subscribe (no fee) or UnSubscribe, please go to: * * http://www.seaint.org/sealist1.asp * * Questions to seaint-ad(--nospam--at)seaint.org. 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: http://www.seaint.org ******* ****** ****** ****** ******* ****** ****** ********