< ^ >
9 - 1 1 R e s e a r c h
.com
.wtc7.net
Home
Misinformation
red flags
daring flight routes
towering infernos
collapsing skyscrapers
miles-wide crash
paper highway
crash-proof passport
flunky super pilots
resurrected hijackers
1000 missing bodies
vanishing jetliner
carousing jihadists
"fatty" bin Laden
official alibis
George W. Bush
Donald Rumsfeld
Richard Myers
Dick Cheney
collapse explanations
experts on parade
Bazant & Zhou
Eagar
notable retractions
Van Romero
Peter Jennings
articles
JEM
Scientific American
JOM
NOVA
collapse theories
progressive collapse
core meltdown
column failure
truss failure
shockwave
piledriver
the 9/11 script
New York Times
Search
Essays
Reviews
Talks
Interviews
FAQs
Materials
Papers
Resources
Site Guide
About
Contact
Contribute
V 1.43
Copyright 2003-2015,
911Research.WTC7.net site last updated:09/09/2015
fair use notice

Background Attack Aftermath Evidence Misinformation Analysis Memorial

The Truss Failure Theory

Theory Invented to Sidestep Problems With Column Failure Theory

The FEMA-endorsed truss failure theory purports to explain the collapses of the Twin Towers with an account of a series of events that supposedly initiated the collapses. It was apparently invented to address the most obvious shortcoming of the column failure theory: that the temperatures of the fires were not nearly high enough to weaken the columns enough to cause them to fail.

NOVA and Dr. Eagar Team Up to Sell the Truss Theory

One of the principal promoters of the truss theory is Dr. Thomas Eagar, a professor of materials engineering at MIT. He co-authored an article in JOM and gave an interview to NOVA , which appears on their website. Though he probably can't claim credit for the truss theory, he might be credited for the zipper theory, which purports to explain the failure of all of the trusses on a floor in quick succession:

The graphics for the NOVA article are interesting for what they leave out.

Also absent from the article are any actual pictures of the buildings being leveled. How thoughtful of them to replace those unpleasant exploding clouds of dust with nice clean computer animations.

Having been promoted by a trusted popular science television program, the truss theory is accepted by the vast majority of Americans who have bothered to wonder about how the towers collapsed, despite more and less obvious flaws in the theory.


page last modified: 2006-08-13