University Study Finds Fire Did Not Cause Building 7’s Collapse on 9/11

On March 25, 2020, researchers at the University of Alaska Fairbanks issued the final report of a four-year computer modeling study on the collapse of World Trade Center Building 7.

The 47-story WTC 7 was the third skyscraper to be completely destroyed on September 11, 2001, collapsing rapidly and symmetrically into its footprint at 5:20 PM. Seven years later, investigators at the National Institute of Standards and Technology (NIST) concluded that WTC 7 was the first steel-framed high-rise ever to have collapsed solely as a result of normal office fires.

Contrary to the conclusions of NIST, the UAF research team found that the collapse of WTC 7 on 9/11 was caused not by fires but by the near-simultaneous failure of every column in the building.

Following the release of this report, AE911Truth and 10 family members of 9/11 victims submitted a formal request for correction to NIST’s report on WTC 7 based partially on the UAF findings. They are now suing NIST over the agency's evasive response to the request.

Downloads: Final Report | Abstract | Request for Correction

UAF Final Report

EN | ES | CS | NL | FR | DE | IT | JA | PL | PT


Join Us in Calling for a New Investigation

Add your name to the growing petition of more than 3,500 architects and engineers.


  The collapse of World Trade Center Building 7. The east penthouse falls first. The structure then instantaneously enters free fall.

Project Information

Lead Researcher

Dr. J. Leroy Hulsey
Professor of Civil Engineering, University of Alaska Fairbanks

Research Assistants

Dr. Feng Xiao
Associate Professor, Nanjing University of Science and Technology

Dr. Zhili Quan
Bridge Engineer, South Carolina Department of Transportation

Project Dates

May 1, 2015 – December 31, 2019


$316,153 (provided by Architects & Engineers for 9/11 Truth)

Simulations and Videos

Public Comments

Following the release of the draft report on September 3, 2019, there was a two-month public comment period, during which members of the public were invited to submit comments, and independent experts external to UAF and AE911Truth also reviewed the report.

The draft report and comments received during the public comment period are available for download below. The names and contact information of commenters have been removed to protect their privacy.

Download: Draft Report | Public Comments

Open Data

All input data, results data, and simulations that were used or generated during this study can be downloaded as a ZIP file by clicking the link below:

Download UAF WTC 7 Files

The files contained in this download will enable any person with the requisite software tools to examine and replicate all of the computer analyses performed during this study.

Please be advised that the size of this ZIP file is 256 GB and that, after unzipping the file, the size of the folder containing all of the files is 632 GB. Therefore, downloading the ZIP file and unzipping it will require approximately 900 GB of storage space.


Please stay tuned for presentations being given in your area as well as for presentations being streamed and/or archived online.

The first presentation following the release of the final report was a live online presentation on March 26, 2020by AE911Truth founder Richard Gage and civil engineer Roland Angle, streamed on this webpage.

The first presentation following the release of the draft report was given in UAF’s Schaible Auditorium on September 3, 2019, and is archived at The second presentation was given at the Faculty Club at UC Berkeley on September 5, 2019.

News and Press Releases