Does someone know of a recent publication dealing
with the impact forces due to a passenger aircraft strike ?
There is a very useful publication on the topic by Jorge Riera
in Nuclear Engineering and Design from 1968 but
the impact force versus time curves in this paper were calculated
for a Boeing 707-320 and 720 aircraft which are by far
smaller than nowadays aircraft, e.g. 757/767-200.
I would appreciate any comment very much !
Warm regards to all of you - it is nice to see from the recent
list contributions that we engineers are not "cold hearted" as
some are suggesting.
Finally, my heartfelt condolences are with the people who lost loved
ones in this inhuman act of war. I pray for them to find peace.
----- Original Message -----
From: "Ron Hill" <ronhill(--nospam--at)hillce.com>
To: "Seaint@Seaint. Org" <seaint(--nospam--at)seaint.org>
Sent: Friday, September 14, 2001 8:49 PM
Subject: RE: IMPORTANT NOTICE REGARDING WTC
> >I often feel that there is little I can do to help and would be glad to
> participate >in any manner I can. I'm sure most of us feel this way. I
> you all to unite >on this effort and help get whatever important support
> Engineers who are >in New York and helping need to do their job.
> Dennis, I feel the same way.
> We have to assume that all records and drawings were destroyed with the
> I would guess that only a small number of engineers worked on the project
> and the repair in 1993. If Cad drawings exist I would assume the repair
> 1993 would be the best bet.
> I have repeated you message in "plain text" below for those who can not
> receive html.
> Ronald Hill, P.E.
> HILL Consulting Engineering
> Birmingham, Alabama USA
> Phone: 205.823.4784
> FAX: 205.823.4145
> Email: ronhill(--nospam--at)hillce.com
> Efax: 509.275.8095
> Yesterday Neal Moore, SE posted a notice on the SEAINT list. Neal is a
> California Engineer who is involved as a volunteer in the emergency work
> being done in Manhattan with regards to the WTC. He requested information
> and specifically drawings from any engineer on the Listservice that may
> done work on the towers or who was involved in any way with the original
> I received a phone call from Fred Turner, SE - California Seismic Safety
> Commission - this morning asking if I had seen any follow-up on the
> sent by Neal or if there were any responses. I had not. Fred thought this
> important and urgent message that we should not take likely or disbelieve.
> There is a great deal of confusion occurring in New York. Neal's urgent
> message was clearly indicative of this. I can't answer why his first
> thoughts were not to contact Skilling directly, but assumed that they need
> drawings and information from anyone who worked on the towers since the
> in order to assist in the search and rescue efforts.
> Finally, I did not save Neal's message, but I'm sure others have. If you
> have any information that can be of assistance, please respond to the
> contacts listed on Neals message, or you might consider contacting the
> following people who were listed on a couple of Stan Caldwells email posts
> who should be able to get the information to Neal Moore:
> Greg Schindler, PE
> NCSEA President
> (206) 622-5822
> (206) 622-8130 fax
> Jeanne Vogelzang
> Vicki Arbitrio, PE
> Secretary SEAoNY
> SEAoNY Delegate to NCSEA
> Finally, there are numerous Listservices and discussion forums related to
> structural engineering (some of the links can be found on my own
> Structuralist.Net Website at http://www.structuralist.net/Professional/ ):
> Because of the urgency of Neals message, I think it would be prudent for
> of us who participate on those other forums to post Neal's message and
> possibly the links listed above in an effort to find other professionals
> with the information that Neal is requesting.
> If you have any information that needs to be forwarded regarding the Trade
> Towers that can help search and rescue and don't have the time or
> opportunity to send an email to the links listed above, please send them
> me and I will make sure they get to the proper people.
> I often feel that there is little I can do to help and would be glad to
> participate in any manner I can. I'm sure most of us feel this way. I urge
> you all to unite on this effort and help get whatever important support
> Engineers who are in New York and helping need to do their job.
> Dennis S. Wish, PE
> Structural Engineering Consultant
> 760.564.0884 - Phone
> 208.361.5447 - Efax
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