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WTC Attempted Roof Rescues
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2001 ABC news segment on NYPD chopper attempted World Trade Center roof rescues.
Sep 8, 2008 5:03 PM
Re: WTC Attempted Roof Rescues
The fire chief speaks the truth. Having been through a few hundred drills in building ranging from 21 to 110 storeys high, the conventional wisdom is that the fire moves its way up. Going a floor or two below the flames is typically sufficient to bring yourself to safety.
The problem with the WTC was the aluminum truss construction, which under the high heat due to the excellent insulation, melted and caused the pancake effect. Aluminum melts as low as 1300F whereas hardened steel can take in excess of 3000F without issue.
The problem with the WTC was the aluminum truss construction, which under the high heat due to the excellent insulation, melted and caused the pancake effect. Aluminum melts as low as 1300F whereas hardened steel can take in excess of 3000F without issue.
By: spam_vigilante
Re: WTC Attempted Roof Rescues
That's the structural problem, the safety problem was the lack of fireproofing of the central staircases. All they had was a simple drywall on box beam enclosure. The collision blasted that away with ease and the fire and smoke poured into the stairwells.
I'm happy to report that the construction of the new Freedom tower less resembles the old WTC and more resembles a very tall bomb shelter. At least, in so far as that the central staircase walls are reinforced concrete, up to two feet thick at the base.
I'm happy to report that the construction of the new Freedom tower less resembles the old WTC and more resembles a very tall bomb shelter. At least, in so far as that the central staircase walls are reinforced concrete, up to two feet thick at the base.
By: Faffy
Re: WTC Attempted Roof Rescues
Just curious... what aluminum truss? The towers were constructed of steel, unless you know something I don't.
By: luclonde
Re: WTC Attempted Roof Rescues
No where does anyone ever mention "aluminum trusses" in the WTC.
I don't believe NIST but, in their words: "Based on this comprehensive investigation, NIST concluded that the WTC towers collapsed because: (1) the impact of the planes severed and damaged support columns, dislodged fireproofing insulation coating the steel floor trusses and steel columns, and widely dispersed jet fuel over multiple floors; and (2) the subsequent unusually large jet-fuel ignited multi-floor fires (which reached temperatures as high as 1,000 degrees Celsius) significantly weakened the floors and columns with dislodged fireproofing to the point where floors sagged and pulled inward on the perimeter columns. This led to the inward bowing of the perimeter columns and failure of the south face of WTC 1 and the east face of WTC 2, initiating the collapse of each of the towers. Both photographic and video evidence—as well as accounts from the New York Police Department aviation unit during a half-hour period prior to collapse—support this sequence for each tower."
http://wtc.nist.gov/pubs/factsheets/faqs_8_2006.htm
So.... what temperature does steel burn? Keep in mind, that people who survived in the towers were within 20 feet, in some cases, of where the plane actually hit and we're NOT killed in the blast or the fire.
http://guardian.150m.com/wtc/how-hot.htm
I like your rant, spam... but I'm wondering what WTC you're talking about - certainly not the two big ones in New York.
I don't believe NIST but, in their words: "Based on this comprehensive investigation, NIST concluded that the WTC towers collapsed because: (1) the impact of the planes severed and damaged support columns, dislodged fireproofing insulation coating the steel floor trusses and steel columns, and widely dispersed jet fuel over multiple floors; and (2) the subsequent unusually large jet-fuel ignited multi-floor fires (which reached temperatures as high as 1,000 degrees Celsius) significantly weakened the floors and columns with dislodged fireproofing to the point where floors sagged and pulled inward on the perimeter columns. This led to the inward bowing of the perimeter columns and failure of the south face of WTC 1 and the east face of WTC 2, initiating the collapse of each of the towers. Both photographic and video evidence—as well as accounts from the New York Police Department aviation unit during a half-hour period prior to collapse—support this sequence for each tower."
http://wtc.nist.gov/pubs/factsheets/faqs_8_2006.htm
So.... what temperature does steel burn? Keep in mind, that people who survived in the towers were within 20 feet, in some cases, of where the plane actually hit and we're NOT killed in the blast or the fire.
http://guardian.150m.com/wtc/how-hot.htm
I like your rant, spam... but I'm wondering what WTC you're talking about - certainly not the two big ones in New York.
By: chawx
Re: WTC Attempted Roof Rescues
Bravo!!
I just saw this despicable show on the History Channel about the 9/11 conspiracies, and luckily someone on youtube has posted an important video on it:
http://www.youtube.com/watch?v=m5zIFxNjBII
I just saw this despicable show on the History Channel about the 9/11 conspiracies, and luckily someone on youtube has posted an important video on it:
http://www.youtube.com/watch?v=m5zIFxNjBII
By: luclonde
Re: WTC Attempted Roof Rescues
Steel doesn't "burn." Did you even read what you copy pasted? If you heat a metal, it's yield point lowers. Meaning that it's more likely to bend under loads it would easily support at room temperature. To not know that is to not understand why blacksmiths didn't just bang on cold iron.
By: Faffy
