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Politics : Bush-The Mastermind behind 9/11? -- Ignore unavailable to you. Want to Upgrade?

To: Don Earl who wrote (13579)	8/17/2006 1:50:50 AM
From: TigerPaw	Read Replies (2) \| Respond to of 20039

Jet fuel, aka kerosene, does not get hot enough to cause the kind of structural failure seen at the WTC. None of the studies say that the fire caused the colums to collapse. The fire caused the floor trusses just above the fire to heat, expand, and weaken. When they expanded they broke the brackets where they were attached to the sides and core. That's what the fire did, it caused a couple of floors to collapse. The columns collapsed because some of the floors collapsed. The buildings sides had to remain vertical in order to keep their strength. You can do an experiment at home. Place a soda or beer can on the floor. Gently balance yourself on the can with one foot (may need to hold onto a wall for balance). The can will support your weight. Now with your other foot, gently tap against the side of the can until you make a slight dent. The can will crush under the very same weight. The building sides were kept vertical by the floors. Once some floors were gone the sides were subject to flexing, and there was already a big hole right where the couple of floors were missing. Initially only those couple of floors crushed, but the 20+ floors that were above them dropped with more energy than the lower floors had strength. It's pretty easy to see in the videos. video.google.com video.google.com