Birdwatch Note Rating
2023-07-17 18:55:49 UTC - HELPFUL
Rated by Participant: 4AFB855C072363AF887682F8A96F5D1041F85D0A8A477A592F2BDDB4A9683D1D
Participant Details
Original Note:
Steel loses its structural strength long before it melts. For the WTC to collapse, the beams did not have to melt, as it was enough that they lost their structural strength due to high temperature. https://www.researchgate.net/figure/Reduction-of-yield-strength-with-temperature-for-different-steel-grades_fig3_281580209
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