Birdwatch Archive

Birdwatch Note Rating

2023-07-18 11:19:00 UTC - HELPFUL

Rated by Participant: A6579B0B4ACF0192EF6C9AB4B515C04DECF0DE3706256BAD88283FC208AEE31D
Participant Details

Original Note:

Steel structure doesn’t need to reach melting temperature to fail. The crash and resulting fire weakened the floors and columns with dislodged fireproofing to the point where floors sagged and pulled inward on the perimeter columns. https://www.nist.gov/world-trade-center-investigation/study-faqs/wtc-towers-investigation

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All Information

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