payne1000 wrote:
Here's another 9/11 event which defies the laws of probability and the laws of physics:
In the 100-year history of steel-framed skyscrapers, the only force which had ever brought one down is controlled demolition. Fire damage or collisions by airliners had never caused a skyscraper to fall.
The public is expected to believe that three steel-framed skyscrapers can fall in one day showing all the characteristics of controlled demolition and not be controlled demolition.
Before you give your opinions, watch this:
http://www.youtube.com/watch?v=0UKfzGt6FxkHere's another 9/11 event which defies the laws of... (
show quote)
Yeah, I've heard that argument many times, and I've seen this particular video. Essentially, it is a straw man. Due to the towers' unprecedented height (tallest buildings in the world at the time), the structural design was unique in that both horizontal forces (wind) and vertical forces (gravity) had to be accounted for--called the "tube within a tube" design, the towers were the first of their kind. The exterior steel columns were designed specifically to resist the horizontal (wind) forces--which could reach 80 mph at 1000 ft coming off NY harbor. The vertical (gravity) support columns were internal, and due to their proximity they sustained heavy impact damage.
(Both hijacker pilots banked the aircraft as they closed on the buildings with the intention of damaging as many floors as possible--North Tower--hit first--sustained damage between the 93rd and 99th floors and the South Tower between the 77th and 84th floors. Note that each floor weighed 4500 tons, therefore the weight above the damage in the North Tower averaged 67,500 tons, and the weight above the damage in the South Tower was twice that, or 135,000 tons. For this reason, even though the South Tower was hit 17 minutes after the first strike, this tower was first to collapse.)
Two other factors were critical to the architectural design--the elevator system and the individual floor plans. The original plan was for buildings of 80 stories, but due to the floor space requirements and the fact that elevators were the only feasible means to access the entire building--particularly the upper floors--(the only stairwells in the towers were the internal emergency fire escapes). Elevator design presented a unique structural problem.
(If you had watched the 9/11 documentary you would have noted that when Chief Pfieffer and his crew, including the videographer, Jules Naudet, entered the lobby of the North Tower, they found all the windows at ground level blown out and there were people either burning or burned--Jules refused to film them. The explosion of jet fuel came down the elevator shafts and raised hell on the ground floors.)
The architecture and structural design of the twin towers is available at many websites.
Sructural engineer describes WTC tower vulnerabilitiesWithout going into more details on the unique structure of the towers and extent of the impact and fire damage to the floors effected (
Killtown website is loaded with data), here is a piece of info that should be noted:
NYC requires seismic monitoring of any construction project within the city (Seismic monitors are also required during controlled demolitions of buildings and other tall structures). On 9/11, 9 such monitors were active at various construction projects in lower Manhattan. These monitors recorded both the impact of the aircraft and the building collapse. Seismic and demolition engineers analyzed this data and determined that the data WAS NOT consistent with that recorded during a controlled demolition.
But hey, none of this means a damned thing to a "troofer" who has experience hanging out of helicopters and filming power towers. Right? Keep plugging away there, payne. That koolaid is some potent sh!t.