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Final Reports from the NIST World Trade Center Disaster Investigation

Final Reports from the NIST Investigation of the World Trade Center Disaster

Final Reports released in September 2005:

NIST NCSTAR 1: Federal Building and Fire Safety Investigation of the World Trade Center Disaster: Final Report of the National Construction Safety Team on the Collapses of the World Trade Center Tower Author(s): Richard G. Gann (Lead Author), Sivaraj Shyam-Sunder (Lead Investigator), William L. Grosshandler, Hai S. Lew, Richard W. Bukowski, Fahim Sadek, Frank W. Gayle, John L. Gross, Therese P. McAllister, Jason D. Averill, James R. Lawson, Harold E. Nelson, Stephen A. Cauffman

NIST NCSTAR 1-1: Design, Construction, and Maintenance of Structural and Life Safety Systems Author(s): Hai S. Lew, Richard W. Bukowski, Nicholas J. Carino

NIST NCSTAR 1-2: Baseline Structural Performance and Aircraft Impact Damage Analysis of the World Trade Center Towers Author(s): Fahim Sadek

NIST NCSTAR 1-3: Mechanical and Metallurgical Analysis of Structural Steel Author(s): Frank W. Gayle, Richard J. Fields, William E. Luecke, Stephen W. Banovic, Timothy J. Foecke, Christopher N. McCowan, Thomas A. Siewert, Joseph D. McColskey

NIST NCSTAR 1-4: Active Fire Protection Systems Author(s): D D. Evans, Richard Peacock, Erica D. Kuligowski, William Stuart Dols, William L. Grosshandler

NIST NCSTAR 1-5: Reconstruction of the Fires in the World Trade Center Towers Author(s): Richard G. Gann, Anthony P. Hamins, Kevin B. McGrattan, George W. Mulholland, Harold E. Nelson, Thomas J. Ohlemiller, William M. Pitts, Kuldeep R. Prasad

NIST NCSTAR 1-6: Structural Fire Response and Probable Collapse Sequence of the World Trade Center Towers Author(s): John L. Gross, Therese P. McAllister

NIST NCSTAR 1-7: Occupant Behavior, Egress, and Emergency Communication Author(s): Jason D. Averill, Dennis S. Mileti, Richard D. Peacock, Erica D. Kuligowski, N Groner, Guylene Proulx, Paul A. Reneke, Harold E. Nelson

NIST NCSTAR 1-8: The Emergency Response Operations Author(s): James R. Lawson, R Vettori

Final Reports released in November 2008:

NIST NCSTAR 1A: Final Report on the Collapse of World Trade Center Building 7 * Author(s): Richard G. Gann (Lead Author), Sivaraj Shyam-Sunder (Lead Investigator), William L. Grosshandler, Hai S. Lew, Richard W. Bukowski, Fahim Sadek, Frank W. Gayle, John L. Gross, Therese P. McAllister, Jason D. Averill, James R. Lawson, Harold E. Nelson, Stephen A. Cauffman

* Errata for NIST NCSTAR 1A, NIST NCSTAR 1-9, and NIST NCSTAR 1-9A, Federal Building and Fire Safety Investigation of the World Trade Center Disaster: Structural Fire Response and Probable Collapse Sequence of World Trade Center Building 7 (January 2009, April 2012, and June 2012) Author(s): Therese P. McAllister

Created June 30, 2011, Updated September 8, 2025
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