https://www.asce.org/publications-and-news/civil-engineering-source/civil-engineering-magazine/issues/magazine-issue/article/2021/09/a-remembrance-the-world-trade-center-towers-and-the-engineers-who-designed-them?utm_medium=email&utm_source=rasa_io&PostID=37300790&MessageRunDetailID= [login to see]
Quote from article: But, as bad as this was, it could have been much worse. The impact hole in the side of each of the WTC towers was about 140 ft wide. It would surprise me if any other high-rise building in the world could survive a 140 ft wide hole without some form of immediate catastrophic collapse. The very stiff perimeter tube moment frame was able to bridge over the gash in each structure and carry the gravity loads of the building until the fire later caused the collapse. That bridging allowed WTC 1 to stand for 1 hour, 42 minutes and WTC 2 to stand for 56 minutes — and that gave time for many to escape.