is it true that only 3 buildings that collapsed due to fire were twin-towers?

Question

and the building next to them, in history of mankind?

Answer 1

I think you mean the first time steel structures collasped due to fire?

No it was not the first time, it's certainly not the last time. It happens more than people realize.

I realize the following example is after 9/11: In Paraguay on August 1st, 2004 a fire burned out of ductwork that had not been properly cleaned and ignited a fire above the ceiling in a two story shopping center with a parking deck. The fire burned above the ceiling, unoticed and eventually MELTED the steel supports and the building's roof collasped. 417 Perished.

The WTC towers what just the first time it happened on that large a scale and that publicly. The WTC fire is constantly compared to other high rise fires such as the One Meridian Plaza Fire in Philadelphia or the First Interstate Bank fire in L.A. But there is one missing component that often is not talked about. The sprinkler systems in these other fires stayed functional and kept the steel frame cool enough to withstand the fire.

Fire weakens and melts steel, that's why we treat the steel with protective coatings and install water sprinkler systems. In the case of the WTC, these systems were compromised or unable to protect the steel.

I ran with fire and rescue in a SMALL community for about 4 years and personally saw two fires in smaller facilities (steel frame) that were not large enough to merit fire sprinklers. The roof and steel trusses gave way in both of those fires.

Firefighters die every year from truss related failures, both wood AND steel, I'll admit more from wood. Check out this quote from the link below...
"More than 60% of the roof systems in the United States are built using a truss system. By design, wooden truss systems contain a significant fuel load and are often hidden from sight. Fires in truss systems can burn for long periods before detection and can spread quickly across or through the trusses. Steel trusses are also prone to failure under fire conditions and may fail in less time than a wooden truss under the same conditions."

Answer 2

Yes, but the first person was correct when pointing out Steel structures is the key thing about the buildings.

Yeah a lot of people now are bashing Loose change, but I think the point of it was to make you think about it and question what you see. I don't think at any point in the movie the say " this is what really happened " and give some unfounded answer all it does is point out problems with the official story that should be researched and should cause Americans to doubt some of the validity of the final report.

Answer 3

You're thinking steel structures, not buildings. And stop watching "Loose Change." Instead, go read the Loose Change...manual I think it is. It goes through every scene and tells you exactly why Loose Change is wrong. I liked the movie at first, then read that, and realized what a load of crap it was.

Answer 4

So What? You can't prove anything because Gulliani went into the scrap business on 9/12