Birdwatch Note Rating
2024-08-13 12:10:39 UTC - HELPFUL
Rated by Participant: AF8BC22B54E21338A544E178341C42644024A1020CB0EB0BA85CA7FC0D3FFA4F
Participant Details
Original Note:
According to NIST, the collapse was initiated by fires ignited by debris from the collapse of the nearby North Tower. The fires caused thermal expansion in floor beams, leading to the failure of a critical column (Column 79), which triggered a progressive collapse. https://www.nist.gov/world-trade-center-investigation/study-faqs/wtc-7-investigation https://www.govinfo.gov/content/pkg/GOVPUB-C13-4d4c17460292ee57ef313f6491fa8d1e/pdf/GOVPUB-C13-4d4c17460292ee57ef313f6491fa8d1e.pdf https://www.nist.gov/publications/final-report-collapse-world-trade-center-building-7-federal-building-and-fire-safety-0 https://www.commerce.gov/news/blog/2021/08/20-years-later-nists-world-trade-center-investigation-and-its-legacy
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