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Can steel buildings really collapse from fire damage?

2007-05-14 04:12:02 · 4 answers · asked by Matthew A 1 in Science & Mathematics Engineering

4 answers

It's well-known that steel loses most of its strength when heated by a simple fire, especially a jet fuel fire. Every single building in the world with a steel frame has plaster put around the steel to prevent it from softening in a fire.

When you heat steel in a simple fire, it doesn't melt, but it becomes like soft taffy. You can't hold up 100,000 tons of weight on soft taffy. Now, in a fire, the plaster fire-proofing will only last a limited time, and on 9-11, the jets smashed off much of the plaster anyway (it's in the reports). The steel softened from the fierce fire. Then it bent as 100,00 tons pressed down on it. The floors sagged. This pulled in the outside columns. Photographs show the columns bending inward. Then the columns snapped (broke) inward & the remaining column sprang outward. This causes the building to then collapse.

==> If this could not happen, then everybody wouldn't be wasting their money "fireproofing" steel.

See: http://www.pbs.org/wgbh/nova/wtc/ for a nice movie explaining what happened.
...............

2007-05-15 08:24:14 · answer #1 · answered by Anonymous · 0 0

Well, consider the fact that a gasoline truck recently crashed into a pylon supporting a span of highway near the San Francisco-Oakland Bay Bridge, and the heat from the fire caused a span of a concrete & steel highway to collapse.

So, yes, it is obviously possible. I'm sure that there are some minor details about what happened on 9/11/01 that might be incorrect or missing, since in the chaos following a disaster a lot of eye witnesses get confused, and evidence is burned up, but I'm sure that the investigators were very careful, and that no one actually lied or tried to hide anything.

2007-05-14 12:20:35 · answer #2 · answered by Randy G 7 · 1 0

YES it can. Fire melts steel every day in this country. That is how Steel is made, using fire.

2007-05-14 11:15:26 · answer #3 · answered by Anonymous · 1 0

Yes, of course..

2007-05-14 11:19:15 · answer #4 · answered by Anonymous · 1 0

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