Birdwatch Note Rating
2023-07-17 16:42:12 UTC - HELPFUL
Rated by Participant: 1B4FFC47BDC9C86FD72B9A40E246DFC89E4BF3D66B5F0BCB33F511C4AB061DC9
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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