Quote:
Originally Posted by merlin8r
Sigh, again with the "not hot enough to melt steel" argument. PLEASE PLEASE PLEASE, go talk to a structural engineer. The steel was NOT melted. It was heated to the point that it became WEAK.
Building 7? As has been mentioned, debris. Come on, the answers are right there. Don't pick and choose your facts.
Burned for days you say? After a jet airliner plowed into them, weakening the structure? In fact I think you will find the construction of the WTC was quite unique, in that the load bearing structure was around the outside. Would a plane smashing through that have some effect on its structural integrity?
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Quote:
Originally Posted by Omaroo
Absolutely - which is why they also collapsed vertically - i.e. the buildings fell "into" themselves - the floor below containing the floor above. The exoskeleton kept it all together. It really isn't that hard to understand.
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To add to these 2 posts, check out the audio podcast on the menu of the Popular Mechanics 9/11 page...
http://www.popularmechanics.com/tech...42.html?page=1
At around 10 mins into the discussion, the above aspects are talked about.
Very interesting - especially how the unique/light weight construction of WTCs contributed to the method of collapse - no girders in WTCs in order to maximize real estate floor space!!!!!
