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<p class=MsoNormal style='margin-bottom:12.0pt'>Seth, et al:<o:p></o:p></p>
<p class=MsoNormal>This firm has been involved with recovery efforts of the
tornado strikes of February 5, 2006. The tornado damage shown in the
attached is perceived by the locals to be the primary day to day threat from
natural hazards. <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>The failure mode is rather simple; the wind lifts the roof
deck and buckles the joists, which in turn pulls inwardly on the top of the
precast panels causing them to fall (see Image 647 and 307). Evidence
indicates that the lateral force resistant system remained standing (see Image
313), however a majority of the building collapsed. This design is pre-1997
NERHP, but included seismic considerations. It’s unlikely that additional
seismic resistance required by 1997 NERHP would affect the outcome. <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>What I’m suggesting is that contrary to the accepted
convention (more seismic is better), we think there can be a case made that
seismic design does not cure all the ills created by the various different natural
disasters as advertised by FEMA.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Image 647 – shows failure mode<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Image 313 – Shows seismic bracing<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Image 307 – Shows failed panels large warehouse<o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>-----Original Message-----<br>
From: ceus-earthquake-hazards-bounces@geohazards.usgs.gov
[mailto:ceus-earthquake-hazards-bounces@geohazards.usgs.gov] On Behalf Of Seth
Stein<br>
Sent: Wednesday, February 13, 2008 7:58 PM<br>
To: WrightLa@usa.redcross.org<br>
Cc: zmwang@email.uky.edu; ceus-earthquake-hazards@geohazards.usgs.gov;
cfostel@conwal.com<br>
Subject: Re: [CEUS-earthquake-hazards] no "right" answer<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoPlainText>Both are problems, but in the US severe weather kills
about 500 people per year and earthquakes kill about 10. Another way to look at
this is that every 6 years severe weather has the same net effect as the 1906
San Francisco earthquake.<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Seth Stein<o:p></o:p></p>
<p class=MsoPlainText>William Deering Professor<o:p></o:p></p>
<p class=MsoPlainText>Department of Earth and Planetary Sciences 1850 Campus
Drive Northwestern University, Evanston, IL 60208<o:p></o:p></p>
<p class=MsoPlainText>(847) 491-5265 FAX: (847) 491-8060 E-MAIL: <a
href="mailto:seth@earth.northwestern.edu">seth@earth.northwestern.edu</a> <a
href="http://www.earth.northwestern.edu/people/seth">http://www.earth.northwestern.edu/people/seth</a><o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>On Wed, 13 Feb 2008 <a
href="mailto:WrightLa@usa.redcross.org">WrightLa@usa.redcross.org</a> wrote:<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>> When earthquakes don't happen, tornadoes are a
bigger problem.<o:p></o:p></p>
<p class=MsoPlainText>><o:p> </o:p></p>
<p class=MsoPlainText>><o:p> </o:p></p>
<p class=MsoPlainText>><o:p> </o:p></p>
<p class=MsoPlainText>> The recent loss of life due to tornadoes is horribly
tragic, and not <o:p></o:p></p>
<p class=MsoPlainText>> to be belittled by any means, but the loss of life
that could be <o:p></o:p></p>
<p class=MsoPlainText>> caused by an 1811 quake in the NMSZ beggars the
imagination.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><b><span style='font-size:12.0pt;font-family:"Arial","sans-serif"'>Joseph
Tomasello, PE</span></b><span style='font-size:12.0pt'><o:p></o:p></span></p>
<p class=MsoNormal><b><span style='font-size:12.0pt;font-family:"Arial","sans-serif"'>5880
Ridge Bend Rd.</span></b><span style='font-size:12.0pt'><o:p></o:p></span></p>
<p class=MsoNormal><b><span style='font-size:12.0pt;font-family:"Arial","sans-serif"'>Memphis,
TN 38120</span></b><span style='font-size:12.0pt'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt'> <o:p></o:p></span></p>
<p class=MsoNormal><b><span style='font-size:12.0pt;font-family:"Arial","sans-serif"'>Phone:</span></b><span
style='font-size:12.0pt'><o:p></o:p></span></p>
<p class=MsoNormal><b><span style='font-size:12.0pt;font-family:"Arial","sans-serif"'>(901)
761-2016 office</span></b><span style='font-size:12.0pt'><o:p></o:p></span></p>
<p class=MsoNormal><b><span style='font-size:12.0pt;font-family:"Arial","sans-serif"'>(901)
821-4968 direct</span></b><span style='font-size:12.0pt'><o:p></o:p></span></p>
<p class=MsoNormal><b><span style='font-size:12.0pt;font-family:"Arial","sans-serif"'>(901)
412-8217 mobile</span></b><o:p></o:p></p>
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