- #1
Moridin
- 692
- 3
Yesterday is the first time I heard that there where three WTC buildings, not two that was destroyed. How/Why did the WTC 7 go down?
WTC 7, also known as World Trade Center Building 7, was a 47-story skyscraper located next to the Twin Towers in New York City. It was not hit by a plane during the 9/11 attacks, but it collapsed in the late afternoon of that day. Its collapse has been a subject of debate and controversy, making it a significant event in the aftermath of 9/11.
The exact cause of the collapse of WTC 7 is still a matter of debate. The official report by the National Institute of Standards and Technology (NIST) concludes that the building collapsed due to fire-induced thermal expansion of long-span beams and connections in the building's east side, which caused a critical column to fail and led to the progressive collapse of the entire structure.
Yes, the NIST report also states that the collapse of WTC 7 was exacerbated by the lack of water for fire suppression, the failure of the building's sprinkler system, and the presence of diesel fuel tanks in the building that provided additional fuel for the fires.
There is no credible evidence to support the theory that WTC 7 was brought down by a controlled demolition. The NIST report thoroughly investigated this possibility and concluded that there is no evidence of a controlled demolition, and that the collapse was consistent with the observed fire damage and structural failures.
Yes, the collapse of WTC 7 prompted changes in building codes and safety measures. The NIST report identified several deficiencies in the building's design and construction, as well as the response to the fire, and made recommendations for improvements. These recommendations have been incorporated into building codes and practices to improve the safety and resilience of buildings in the event of a fire or other emergency.