-Caveat Lector- >A word on the structure of the WTC towers: > >The WTC towers had a distinctive structural system which utilized >the exterior wall framing for lateral bracing -- a so-called lattice >framework. This allowed minimization of internal lateral bracing >and opened up the floor plans. You can see the effect of that when >the buildings collapsed, with the lattice framework crumbling and >the interior imploding. The lattice works so long as it remains >intact as a system: if a part of it goes, then the whole system >goes. > >The planes punched holes in the lattice, one tower punched >on two sides, maybe the other too. Portions of the lattice of >the second tower briefly remained standing after the collapse, >then fell. > >The system was considered daring at the time of construction, for >it distributed loads more efficiently than legacy column-and-beam- >supported systems. Probably the legacy systems would not have >totally collapsed due to damage at upper floors, although floors >above the damage would have come down if columns were >weakened. > > <A HREF="http://www.ctrl.org/";>www.ctrl.org</A> DECLARATION & DISCLAIMER ========== CTRL is a discussion & informational exchange list. Proselytizing propagandic screeds are unwelcomed. Substance�not soap-boxing�please! These are sordid matters and 'conspiracy theory'�with its many half-truths, mis- directions and outright frauds�is used politically by different groups with major and minor effects spread throughout the spectrum of time and thought. That being said, CTRLgives no endorsement to the validity of posts, and always suggests to readers; be wary of what you read. CTRL gives no credence to Holocaust denial and nazi's need not apply. Let us please be civil and as always, Caveat Lector. ======================================================================== Archives Available at: http://peach.ease.lsoft.com/archives/ctrl.html <A HREF="http://peach.ease.lsoft.com/archives/ctrl.html";>Archives of [EMAIL PROTECTED]</A> http:[EMAIL PROTECTED]/ <A HREF="http:[EMAIL PROTECTED]/";>ctrl</A> ======================================================================== To subscribe to Conspiracy Theory Research List[CTRL] send email: SUBSCRIBE CTRL [to:] [EMAIL PROTECTED] To UNsubscribe to Conspiracy Theory Research List[CTRL] send email: SIGNOFF CTRL [to:] [EMAIL PROTECTED] Om
