“It’s typical to load steel no higher than 60% of the steel’s room temperture strength. Look at the chart, and you will see the line cross the 60% line at about 1200F. It take 2700F to turn steel to liquid, which is not necessary .”
Before posting ridiculously ambiguous information on here by showing a graph which, albeit relevant to 5 floors vs 105 floors, it might be a good idea to actually read the NIST report cover to cover and get back to us on their findings.
Sorry I wrote this above your level of comprehension.