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Originally posted by JBA2848
I still say after the bombings in the parking garge.93 bombingThey sat down had a meeting and decide the destruction created by one of these buildings tipping from an explosion was to much to dill with in the aftermath and the loss of life and property from the surrounding buildings were to high. So they devised a way to limit the damage by placing explosives perminently in the buildings in case of emergency. On 911 emergecy was declared and the owner of the building in his own words said "pull it" meaning blow the structure so there would be less chance of tipping buildings and a controlled in its own footprint collapse. Im not saying they were part of 911 just they had a secret emergency plan for less destruction. I think even them involed with this emergency planning never had any idea how much chaos and destruction would be involed but couldn't imagine how much more there could be with a tipping building collapsing on neigboring buildings the domino effect was to scary to allow.
Originally posted by dragonridr
if that region on any floor is catastrophically damaged (as it certainly was by the fire in the north tower), the entire building is doomed.
Originally posted by dragonridr
Had the WTC facade contained even minimal masonry elements and/or traditional heavy steel outermost column rows, it is unlikely the aircraft would have cleanly penetrated to the core of each tower— a significant portion of debris and jet fuel would have remained outside, a much different scenario.
Originally posted by dragonridr
Computer models have shown that most of the stairwells in both towers would likely have remained usable until the general collapse had they been shielded in concrete.
Originally posted by JBA2848
reply to post by hooper
Thermite reactions require very high temperatures for initiation. So putting thermite on structual beams in the building would be safe. Structural beams are wrapped in a fire wall using several layers of 5/8 inch thick layers of fire rock. Repairs of structural beams were done all over the building after the 93 bombing. Allowing them access to all structural joints in the building.
So you really think putting thousands of tons of thermite in a building is safe? And then letting that building be occupied by people? You're not even allowed to store thermite in the same building as people. Thermite does not require "very high temperatures" to initiate. We use propane/oxy torches.
Access to "all structural joints"? You mean after the 93 bombing they strip down the entire interior of the whole building? That would be the only way that you would have access to all the joints. I take it you have some hard and fast reference for this work.
[edit on 15-8-2009 by JBA2848]
Originally posted by dragonridr
reply to post by detachedindividual
You obviously know very little about demolitions first if your going to use explosives which is not the best way just so you know. First you have to prep the sight bu cutting support beams floor joists and weaken the structure just short of collapse. Then you would use explosives set off to time a rocking effect you want to get the internal structure rocking to get it to shear the weakened points you already made. The explosive going off is not enough to cut through a steel beam the trick is to weaken it beyond its threshold causing it to fail. To bring down a building like the world trade center they would have had to evacuate the building strip all the inner walls to get to the support beams. Do alot of cutting and even disassembling part of the building just to get it to the point explosives could take it down.
Originally posted by JBA2848
Heres a link to another thread with pictures of beams that sure look like they were cut with thermite.
www.abovetopsecret.com...
Thernite charge patent
Originally posted by dragonridr
Your right there is no pretense for this because there was no one that attempted to build a hi rise of this magnitude using this construction technique heres a challenge find one.
Wiki
The first building to apply the tube-frame construction was the DeWitt-Chestnut apartment building which (Fazlur) Khan designed and was completed in Chicago by 1963. This laid the foundations for the tube structures of many other later skyscrapers, including his own John Hancock Center and Willis (Sears) Tower, and can been seen in the construction of the World Trade Center, Petronas Towers, Jin Mao Building, and most other supertall skyscrapers since the 1960s.
Originally posted by dragonridr
First you have to prep the sight bu cutting support beams floor joists and weaken the structure just short of collapse
Originally posted by dragonridr
To bring down a building like the world trade center they would have had to evacuate the building strip all the inner walls to get to the support beams. Do alot of cutting and even disassembling part of the building just to get it to the point explosives could take it down.
Originally posted by dragonridr
This is the reason that many people switched over to saying thermite was used because they weren't aware of how difficult it is to bring down a building with explosives.