Birdwatch Note Rating
2023-07-18 13:03:55 UTC - HELPFUL
Rated by Participant: 7F7C57FCE8B3CF885F5919A680BAC8800D5E95E8F3CA92A2DF98A041F403190D
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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