Written by Chris Sarns
Architects and Engineers for 911 Truth
June 10, 2013

Editor’s note: To this day, most people, including many architects and engineers, are not aware that a third skyscraper, World Trade Center Building 7, mysteriously collapsed along with the World Trade Center Twin Towers on September 11, 2001. The official report on this building’s collapse by the National Institute of Standards and Technology (NIST) has been challenged by many reputable and credentialed technical professionals. The NIST analysis has not undergone the rigors of scientific peer review – the typical pathway for validating significant scientific theories. Chris Sarns’ research appears in Dr. David Ray Griffin’s book titled “The Mysterious Collapse of World Trade Center 7”. The studies below represent years of work by Chris Sarns in unraveling some of the most glaring inconsistencies and outright frauds in the NIST report on World Trade Center 7. He demonstrates that the NIST’s theory of the fire-induced collapse of Building 7 is faulty and misleading.

The destruction of this skyscraper on September 11 was truly unprecedented in the history of high-rise buildings. More than 1,900 architects and engineers at AE911Truth are demanding a new investigation.

Chris Sarns has also been deeply involved in the work of AE911Truth, where he provides his expertise on WTC 7.

Part 1 of Chris Sarns’ report, regarding the burned-out fire in WTC7, is available here.

Quotes from the NIST WTC7 report are shown in “blue”.


NIST used numerous unscientific methods and fraudulent inputs to get the key girder to fail in its computer simulation..

NIST arbitrarily added 10% to the temperature results of its fire dynamics simulation (FDS).

“Case A used the temperature data as obtained from the FDS simulation. Case B increased the Case A gas temperatures by 10 percent.”  NCSTAR 1A p. 32 [pdf p. 74]

“…only the fire-induced damage produced by Case B temperatures was carried forward as the initial condition for the building collapse analysis.”  NCSTAR 1A p. 36 [pdf p. 78]

To get the shear studs on the floor beams to fail, NIST assumed high steel temperatures and applied the heat in 1-1/2 seconds over the entire north east part of floor 13. This method does not allow for heat dispersal or beam sagging.

NIST heated the floor beams, but not the slab. Since concrete expands at 85% the rate of steel, leaving this expansion out of the calculations of the failure of the shear studs is fraudulent.

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