Comment: Why do I get the feeling they aren't going to start

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Why do I get the feeling they aren't going to start

building skyscrapers with wooden beams, though?

You'll find plenty of deformed steel examples from very hot fires, but always partial and piecemeal failures. There have been many much hotter, larger, and longer-burning fires. If the WTCs collapsed as a result of fire, they should have collapsed too, since the fires were even hotter and more widespread.

In 1991 One Meridian Plaza in Philadelphia, burned for 18 hours, did not fall down. In 2004 in Caracas, Venezuela, a 56-story office tower burned for more 17 hours and spread over 26 floors. Two floors
collapsed, but the underlying floors did not. The Windsor Towers fire in Madrid 2005 was a true raging inferno. It burned for 20 hours much hotter than the WTCs due to 40mph gusts of wind. The tower looked like a giant torch.

This kind of fire does not let anyone stand nearby in the windows, like the WTC fires did. If you've ever watched an engulfed building (I have) you can feel the heat from a block away, and firefighters can't get near it, only hose it from a distance. It's just too hot. The Windsor suffered partial collapse in some places, but it was slow and
in pieces. But a sky crane remained perched on the roof. Here is a timeline of the pieces of the collapse for Windsor Towers:

Time Collapse Situation
1:29 East face of the 21st floor collapsed
1:37 South middle section of several floors above the 21st floor
gradually collapsed
1:50 Parts of floor slab with curtain walls collapsed
2:02 Parts of floor slab with curtain walls collapsed
2:11 Parts of floor slab with curtain walls collapsed
2:13 Floors above about 25th floor collapsed Large collapse of middle
section at about 20th floor
2:17 Parts of floor slab with curtain walls collapsed
2:47 Southwest corner of 1 ~ 2 floors below about 20th floor collapsed
2:51 Southeast corner of about 18th ~ 20th floors collapsed
3:35 South middle section of about 17th ~ 20th floors collapsed Fire
broke through the Upper Technical Floor
3:48 Fire flame spurted out below the Upper Technical Floor
4:17 Debris on the Upper Technical Floor fell down

A man who views the world the same at fifty as he did at twenty has wasted thirty years of his life.
-- Muhammad Ali