Dan Minette wrote: >> My concern WRT the conspiracy theories is in the way 3 WTC >> buildings >> collapsed fairly squarely into thier footprints. It is quite >> difficult to *make* this occur (in the sense that work must be done >> to garuantee it), yet 3 WTC buildings did just that on their own >> and >> one was not even hit by a plane. If I have any doubts about the >> "rational" explanation it lies there. > > At the Scientific American site we have this explaination: > > <quote> > Kausel addressed the oft-asked question of why the towers did not > tip > over like a falling tree. "A tree is solid, whereas building is > mostly air or empty space; only about 10 percent is solid material. > Since there is no solid stump underneath to force it to the side, > the > building cannot tip over. It could only collapse upon itself." > Robert > McNamara said his failure mechanism theory "focuses on the > connections that hold the structure together," but he cautioned that > "we really need to wait for a detailed investigation, before we > decide if we have to up the code ratings for these connections in > signature structures <end quote> > > To make it tilt, one side of the building would have to hold for a > significantly longer time than the other. If you watch the video of > the south tower (I think it is the south tower), you will see some > tilting at the beginning. After that, its more like a wave in a > structure. > > In essence, by the time the wave got down 20 floors, the forces > involved in stopping it were much greater than the design strength > of > the connections. They broke very quickly...so that even a 50% > variation in breaking speed would not cause tilt. > > I think part of the problem in intuiting this is that our gut level > experience is not with this type of collapse with this type of > structure. > > Now, if the bottom collapsed, then we would expect tilt, but not the > top. > One of the towers was hit distinctly off center, yet it collapsed almost exactly as its twin. And what collapsed WTC8?
(This is a good bit of fun<G>) xponent Conspiracy Points And Blunts Maru rob _______________________________________________ http://www.mccmedia.com/mailman/listinfo/brin-l
