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Originally Posted by ASU2003
http://www.clemusart.com/exhibcef/mu...ng,%201998.jpg
From this picture, let's say that the botom 4 floors were destroyed by the bomb. The fifth floor would have no support under it, so it would colapse. The sixth floor is connected it that one, so it would follow. Then when the fifth floor hits the ground with the weight of all of the floors above it, would there be a pause, resistance, or slowing down. Or would it be like dropping a bowling ball onto a pop can? Wouldn't the top most floors have some large pieces of them left?
What caused the Oklahoma Fed building to stay up? Is it because the fire wasn't there? Here is the video of the implosion. You can hear the explosives, but I bet there are quiet explosives that just get very hot...
http://www.cnn.com/US/OKC/reporters/.../implosion.mov
There isn't much resistance in the parts that had explosive charges, and the places that didn't get blasted, were slower to topple over.
It looks like it took twice as long for the OK Fed building to come down than from the animated gif movie above. I'm not sure if that is because the buildings were constructed differently or what.
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I’m not sure why were dealing with the federal building right now, it has nothing to do with the WTC, but here we go.
First the picture, the main difference in the 2 is that WTC7 did not lose any part of the top, just damage to the bottom, where as the federal building, it did collapse, just not all of it, the entire front section collapsed. The bomb hit the front side of the building, not the rear, the rear was still structurally viable, that is why it remained standing, the fires were there, but not through out the building, mainly just in the front where the bomb hit. This is not the case in WTC7 the fire was in the basement where the diesel was stored, this weekend the main supports, causing the asymmetrical collapse, center first, then the rest a half second later. The building design is very different of the 2 buildings, so they are not comparable.
And that picture you show of the federal building, is not accurate at all
http://upload.wikimedia.org/wikipedi...ty_bombing.jpg
http://images.encarta.msn.com/xrefme...9/T059167A.jpg
In this pic, looks how the supports are covered in concrete unlike the WTC, which was tubular steel, that is why it still stood, any fire would be protected from the steel, and it could survive longer until the fire suppression got to the scene, unlike in the WTC, where the fire was able to reach the steel directly.
As for silent explosives… um, no, there is no such thing as a silent explosive, it is physically impossible to make a silent explosive. As for cutting metal silently, it’s still not easy, last week at work I had the privilege to destroy some hard drives with a cutting torch, it was loud, noisy, slow and messy. On several occasions, the liquid metal popped, and put out the torch, and I was only cutting aluminum. The setup to use a cutting torch to cut the structure would be next to impossible. As for thermite, thermite can not be used to cut laterally, only vertically, the flow cannot be directed other than by gravity; again not suitable for cutting supports. The only way is to set shaped charges to slice the supports, and then secondary charges to blow the beam out of alignment so that it can fall, other wise it will just stay in the same place. But there is no evidence of explosives in the building, and the setup to do so is too much to accomplish.