Birdwatch Note Rating
2023-07-18 20:56:30 UTC - HELPFUL
Rated by Participant: D2AF183512E975AD44D6DB40AE87F51E0064E277DAD82F432F7A5E2654C9B024
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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