Prelude 9/11 morning Flight 11 hijacked Flight 175 hijacked WTC 1 hit Flight 77 hijacked WTC 2 hit Flight 93 hijacked Pentagon hit WTC 2 collapses Flight 93 crashes WTC 1 collapses WTC 7 collapses Epilogue


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NIST (technology)

The National Institute for Standards and Technology (NIST) is a physical sciences laboratory, and a non-regulatory agency of the United States Department of Commerce.
Following the terror attack on September 11 2001, NIST was tasked to investigate the buildings in the World Trade Center that collapsed due to the attack.

The goals of the investigation of the WTC disaster were :

  • To investigate the building construction, the materials used, and the technical conditions that contributed to the outcome of the WTC disaster.
  • To serve as the basis for: improvements in the way buildings are designed, constructed, maintained, and used; improved tools and guidance for industry and safety officials; recommended revisions to current codes, standards, and practices; and improved public safety.

The specific objectives were:

  • Determine why and how WTC 1 and WTC 2 collapsed following the initial impacts of the aircraft and why and how WTC 7 collapsed;
  • Determine why the injuries and fatalities were so high or low depending on location, including all technical aspects of fire protection, occupant behavior, evacuation, and emergency response;
  • Determine what procedures and practices were used in the design, construction, operation, and maintenance of WTC 1, 2, and 7; and
  • Identify, as specifically as possible, areas in current building and fire codes, standards, and practices that warrant revision.

Source: World Trade Center Disaster Study, NIST

Hearings and press briefings

November 20, 2008 – WTC 7 Final Reports Released

August 26, 2008 – WTC 7 Technical Briefing

August 21, 2008 – WTC 7 Press Briefing

September 8, 2006 – New York City Council Joint Meeting

October 19, 2005 – 4th Annual Congress on Infrastructure Security for the Built Environment

June 23, 2005 – Public/Media Briefing

September 13-15, 2005 – Technical Conference

April 5, 2005 – Public Briefing

June 8, 2005 – NFPA World Safety Conference & Exposition, Las Vegas, NV

September 9, 2004 – Chicago Committee on High-Rise Buildings

February 12, 2004 – Public Meeting

October 23, 2003 – Workshop to Review Reference Structural Models of the WTC Towers Developed by LERA

September 17, 2003 – Media Briefing

May 7, 2003 – News Briefing

April 8, 2003 – Public Briefing

December 9, 2002 – News Briefing

August 21, 2002 – News Briefing

June 24, 2002 – Public Meeting

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