Birdwatch Note Rating
2023-07-18 21:16:49 UTC - HELPFUL
Rated by Participant: FE74CEE13AEAEE92EBC07F11DEE735A79D406D7C139884824E9A4CA25CD471D2
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
All Note Details