Birdwatch Note Rating
2023-07-18 14:33:04 UTC - HELPFUL
Rated by Participant: 96F27096A9AC45CAC365BC1AF2B36C050DB671B01E5803828629900B03AF357B
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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