Birdwatch Note Rating
2024-08-13 15:15:17 UTC - HELPFUL
Rated by Participant: 9D8452D8FBF8D9CCBD9192980EE4E0DDE2631DAE26B5225DF514D2C1EDF45757
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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