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NIST and the World Trade Center
The collapse of New
York City’s World Trade Center structures following the terrorist
attacks of Sept. 11, 2001, was the worst building disaster in recorded
history, killing some 2,800 people. More than 350 fire and emergency responders
were among those killed, the largest loss of life for this group in a
single incident.
In response to the
WTC tragedy, the National Institute of Standards and Technology conducted
a 3-year building and fire safety investigation to study the factors
contributing to the probable cause (or causes) of post-impact collapse
of the WTC Towers (WTC 1 and 2) and WTC 7; expanded its research in areas
of high-priority need such as prevention of progressive collapse, fire
resistance design and retrofit of structures, and fire resistive coatings
for structural steel; and is reaching out to the building and fire safety
communities to pave the way for timely, expedited considerations of recommendations
stemming from the investigation.
Note: Many of the reports
and other documents provided are presented in .pdf format. To read these files, you can download
the
latest version of Adobe Acrobat Reader free. If you have difficulty
reading pdf files, you may need to update
your version of Acrobat reader to the latest version.
For a printed copy of NIST-NCSTAR 1 (WTC Towers summary report) or NIST-NCSTAR 1A (WTC 7 summary report), contact
NIST at inquiries@nist.gov.
Also available are CD sets containing all of the reports.
Key News and Updates
- NIST Releases Final WTC 7 Investigation Report (11/20/08)
- NIST NCSTAR 1A: Final Report on the Collapse of World Trade Center Building 7
- Questions and Answers about the NIST WTC 7 Investigation (Updated 12/18/08)
- Technical Briefing on the NIST Investigation Into the Collapse of WTC 7 (August 26, 2008)
- Briefing for the News Media on the NIST Investigation Into the Collapse of WTC 7 (August 21, 2008)
- Video: The Collapse of World Trade
Center 7: Why the Building Fell
- Download High-Res Graphics: Typical WTC 7 Floor Diagram (2 MB) and Thermal Expansion Illustration (29 MB)
- Public Comments on Draft WTC 7 Investigation Report
- Safer Buildings Are Goal of New Code Changes Based on Recommendations from NIST World Trade Center Investigation (10/01/08)
- Detailed WTC 7 Technical Briefing Presentation Slides, (11/19/08 revised)
- NIST WTC 7 Investigation Finds Building Fires Caused Collapse, (08/21/08)
- Opening Statement Press Briefing, August 21, 2008, Report on the Collapse of World Trade Center
Building 7
- NIST Response to the World Trade Center Investigation Disaster Presentation, Dr. S. Shyam Sunder, Director and Lead Investigator, Building and Fire Research Laboratory, NIST
NIST WTC Investigation General Information
Launch of NIST WTC Investigation - August 2002
Background on Related NIST Work
Photo Gallery
Archives
(past news and information)
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Final
Reports of the Federal Building and Fire Investigation of the World
Trade Center Disaster
NIST Releases Final WTC 7 Investigation Report
Video: The Collapse of World Trade
Center 7: Why the Building Fell
Status of NIST's Recommendations
Frequently Asked Questions (FAQs)
General Contact Information
Contact NCST Advisory Committee
National Construction Safety Team Advisory Committee
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