It can structurally weaken it. Steel beams melt at 1500c but they completely lose their structural integrity at 800c to 1000c if suspended just over a wood fire. Wood burns easily at 800c to 1000c. There are videos of people doing this test online.
The structural beams did not need to melt. They only needed to be weakened enough for the concrete above them to overcome the structural integrity of the beams being blasted with 1000c heat for hours on end.
It can structurally weaken it. Steel beams melt at 1500c but they completely lose their structural integrity at 800c to 1000c if suspended just over a wood fire. Wood burns easily at 800c to 1000c. There are videos of people doing this test online.
The structural beams did not need to melt. They only needed to be weakened enough for the concrete above them to overcome the structural integrity of the beams being blasted with 1000c heat for hours on end.
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