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Collapse of the World Trade Center
Discussion of the engineering of the towers, and speculations about the modes of failure. From the University of Sydney Department of Civil Engineering.
www.civil.usyd.edu.au
Presents observations, analyses, and conclusions that are believed to be worth presenting for discussion. Comments, questions, and corrections are invited.
www.scieneering.com
WTC Locked Fire Doors and Other Exit Barriers
Accumulation of quotes on locked doors into and out of the WTC fire stair, plus other evacuation barriers, including barrier to the disabled.
www.mjbarkl.com
An interview in New Scientist with John Knapton, professor of structural engineering at Newcastle University, employed to assess the collapse of the World Trade Center.
www.newscientist.com
ArchitectureWeek: World Trade Center Destroyed
Editorial by Kevin Matthews, editor in chief and B.J. Novitski, managing editor.
www.architectureweek.com
How Could the World Trade Center Collapse So Quickly?
A brief technical review of the World Trade Center's construction and its tragic destruction. From The Society for New York City History.
www.salwen.com
New Scientist: Design Choice for Towers Saved Lives
A lucky choice of design for the World Trade Center towers reduced the death toll caused by their destruction, say engineers.
www.newscientist.com
Jupiter Scientific explains the physics of the destruction of the towers.
www.jupiterscientific.org
Nova Online: Why the Towers Fell / Building on Ground Zero
Investigates the causes of the collapse. Includes interviews with survivors and engineers, information on the design of the building and recommendations for future buildings.
www.pbs.org
Final Reports of the Federal Building and Fire Investigation of the World Trade Center Disaster
This report describes how the aircraft impacts and subsequent fires led to the collapse of the towers after terrorists flew jet fuel laden commercial airliners into the buildings; whether the fatalities were low or high, including an evaluation of the building evacuation and emergency response procedures; what procedures and practices were used in the design, construction, operation, and maintenance of the towers; and areas in current building and fire codes, standards, and practices that warrant revision.
wtc.nist.gov
World Trade Center - Some Engineering Aspects
University of Sydney civil engineering department shares some thoughts and quick analyses.
www.civil.usyd.edu.au
Why Did the World Trade Center Collapse? Science, Engineering, and Speculation
Article appears in the journal JOM, 53 (12) (2001), pp. 8-11.
www.tms.org