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Strategies & Market Trends : The Residential Real Estate Crash Index
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To: alanrs who wrote (229260)11/18/2009 7:41:55 AM
From: Think4YourselfRead Replies (2) of 306849
 
The beams are covered with concrete, which both protects them and dramatically strengthens them. The concrete expanded and cracked off when it experienced thermal expansion from the intense heat. The steel heated up, which weakened it. Once the first floor failed, the massive impulse from tons of material falling 10 feet guaranteed every other floor was going to fail.

The delay between the start of the fire and the collapse was because the above didn't happen instantaneously. From an engineering standpoint the sequence of events was totally predictable. The only thing I found interesting is the small footprint of the rubble. It appears the core was responsible for this.

A number of supposed engineers went on TV and said all this couldn't happen. I suspect all those incompetent buffoons couldn't calculate a simple integral and are now unemployed.
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