joc, on 13 January 2013 - 09:46 PM, said:
Very interesting. But it doesn't refute anything. There are alot of differences. First, look at the amount of debris that these buildings left behind...compared to the debris left behind from WTC. Second, none of these buildings were built like the WTC with a main core of Steel. These buildings were built to withstand a Boeing 707 direct hit....and they did. The fires were not raging inside the buildings...they were pretty much contained. So how does the Vernage effect take place there?
The engineers built the WTC towers strong enough to absorb a strike by a B-707, but they failed to take into an account an impact dislodging the fire protection for the steel structure, which exposed the unprotected steel structure to temperatures high enough to weaken steel. The temperatures didn't need to be high enough to melt steel, but just high enough to weaken the remaining undamaged steel columns to the point of failure.
Looking at it this way, let's say that a 100 pound weight is supported by four legs, each capable of supporting 35 pounds. One leg was struck and taken out, which leaves the 3 remaining legs supporting the 100 pound weight with 5 pounds of additional strength to spare, however, add heat that saps 20% of the strength from each of the remaining 3 legs and you will eventually have a collapse.
The aircraft damaged much of the supporting steel structure and temperatures were high enough from the fires that were in the range to weaken the remaining steel structure. The proof that high temperatures from the fires initiated the collapse of the WTC buildings can be determined by the fact the WTC buildings began to buckle in the minutes prior to their collapse, which was a clear indication that fires were slowly weakening the steel structures to the point of collapse and the remaining structures could only absorb so much of the overhead weight and explains why WTC2 collapsed before WTC1, and remember, WTC1 was struck first, but was the second building to collapse because it supported less overhead weight than WTC2. Let's take a look at the following picture and notice that WTC1 is supporting less overhead weight than WTC2.
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Where was the raging fire in the WTC?
In the areas where they were struck.
Edited by skyeagle409, 13 January 2013 - 10:45 PM.