Citazione:

"7a. How could the steel have melted if the fires in the WTC towers weren’t hot enough to do so?

[...]

In no instance did NIST report that steel in the WTC towers melted due to the fires. The melting point of steel is about 1,500 degrees Celsius (2,800 degrees Fahrenheit). Normal building fires and hydrocarbon (e.g., jet fuel) fires generate temperatures up to about 1,100 degrees Celsius (2,000 degrees Fahrenheit). NIST reported maximum upper layer air temperatures of about 1,000 degrees Celsius (1,800 degrees Fahrenheit) in the WTC towers (for example, see NCSTAR 1, Figure 6-36)."

NIST

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Peter Tully, president of Tully Construction of Flushing, New York, told AFP that he saw pools of "literally molten steel" at the World Trade Center. Tully was contracted on September 11 to remove the debris from the site.

Tully called Mark Loizeaux, president of Controlled Demolition, Inc. (CDI) of Phoenix, Maryland, for consultation about removing the debris. CDI calls itself "the innovator and global leader in the controlled demolition and implosion of structures."

Loizeaux, who cleaned up the bombed Federal Building in Oklahoma City, arrived on the WTC site two days later and wrote the clean-up plan for the entire operation.

AFP asked Loizeaux about the report of molten steel on the site. "Yes," he said, "hot spots of molten steel in the basements." These incredibly hot areas were found "at the bottoms of the elevator shafts of the main towers, down seven [basement] levels," Loizeaux said. The molten steel was found "three, four, and five weeks later, when the rubble was being removed," Loizeaux said. He said molten steel was also found at 7 WTC, which collapsed mysteriously in the late afternoon.

American Free Press

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"I didn't personally see molten steel at the World Trade Center site. It was reported to me by contractors we had been working with. Molten steel was encountered primarily during excavation of debris around the South Tower when large hydraulic excavators were digging trenches 2 to 4 meters deep into the compacted/burning debris pile. There are both video tape and still photos of the molten steel being «dipped» out by the buckets of excavators. I'm not sure where you can get a copy."

Mark Louizeux - 911Myths




Foto di Frank Secchia

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Alison Geyh, who heads a team of scientists studying the potential health effects of 9/11, reports: “Fires are still actively burning and the smoke is very intense. In some pockets now being uncovered, they are finding molten steel.” [Johns Hopkins Public Health Magazine, 2001]

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New York firefighters recall “heat so intense they encountered rivers of molten steel.” [New York Post, 3/3/2004]

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Public health advisor Ron Burger, a veteran of disasters from the Mississipi floods to Mt. St. Helens who arrives at Ground Zero on September 12, said: "Feeling the heat, seeing the molten steel, the layers upon layers of ash, like lava, it reminded me of Mt. St. Helens [...]."

National Environmental Health Association, 9/2003

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According to Greg Fuchek, vice president of a company that supplied computer equipment used to identify human remains at Ground Zero: "Sometimes when a worker would pull a steel beam from the wreckage, the end of the beam would be dripping molten steel."

Government Computer News, 9/11/2002

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"The fires got very intense down there and actually melted beams where it was molten steel that was being dug up."

Richard Riggs, Debris Removal Specialist in “World Trade Center: Rise and Fall of an American Icon,” THC, 2002.


http://www.youtube.com/watch?v=3SLIzSCt_cg


http://www.youtube.com/watch?v=hLCwq3-RzZs > "Les Robertson, in presentation at Stanford University, confirms that he saw a «river of molten steel» at the B1 level of the WTC debris pile"

IC911STUDIES

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"Various metals (most notably iron and lead) were melted during the WTC Event, producing spherical metallic particles."

RJ Lee Group - WTC Dust Signature Report

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An engineer investigating the remains of the World Trade Center sees melted girders and other evidence that the towers experienced extreme temperatures on 9/11. Dr. Abolhassan Astaneh-Asl is a professor of civil and environmental engineering at the University of California, Berkeley. He specializes in studying structural damage done by earthquakes and terrorist bombings. [Chronicle of Higher Education, 12/7/2001; CBS News, 3/11/2002] He arrives in New York on September 19 to conduct a two-week scientific reconnaissance of the collapsed towers, hoping to gain an understanding of how they had come down. His project is one of eight financed by the National Science Foundation to study the WTC disaster. [New York Times, 10/2/2001; Berkeleyan, 10/3/2001; US Congress. House. Committee on Science, 3/6/2002] He examines numerous pieces of steel taken from Ground Zero. [Chronicle of Higher Education, 12/7/2001] Astaneh-Asl will describe the WTC as “the best-designed building I have ever seen.” [San Francisco Chronicle, 10/22/2001] Yet he notices unusual warping and other damage in its remaining steel:

He notes that steel has bent at several connection points that had joined the floors of the WTC to the vertical columns. He describes the connections as being smoothly warped, saying, “If you remember the Salvador Dali paintings with the clocks that are kind of melted—it’s kind of like that.” He adds, “That could only happen if you get steel yellow hot or white hot—perhaps around 2,000 degrees.” [Chronicle of Higher Education, 12/7/2001]

He later recalls, “I saw melting of girders in [the] World Trade Center.” [PBS, 5/10/2007]

Astaneh-Asl sees a charred I-beam from WTC Building 7, which collapsed late in the afternoon of 9/11. “The beam, so named because its cross-section looks like a capital I, had clearly endured searing temperatures. Parts of the flat top of the I, once five-eighths of an inch thick, had vaporized.” [New York Times, 10/2/2001]

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"Perhaps the deepest mystery uncovered in the investigation involves extremely thin bits of steel collected from the trade towers and from 7 World Trade Center; a 47-story high rise that also collapsed for unknown reasons. The steel apparently melted away, but no fire in any of the buildings was believed to be hot enough to melt steel outright."

New York Times, 02/02/2002, James Glanz and Eric Lipton


"The thinning of the steel occurred by a high-temperture corrosion due to a combination of oxidation and sulfidation.

Heating of the steel into a hot corrosive environment approaching 1,000 °C (1,800 °F) results in the formation of a eutectic mixture of iron, oxygen, and sulfur that liquefied the steel.

The sulfidation attack of steel grain boundaries accelerated the corrosion and erosion of the steel."

http://911research.wtc7.net/wtc/evidence/metallurgy/WTC_apndxC.htm


"Jonathan Barnett, professor of fire protection engineering, has repeatedly reminded the public that steel - which has a melting point of 2,800 degrees Fahrenheit - may weaken and bend, but does not melt during an ordinary office fire. Yet metallurgical studies on WTC steel brought back to WPI reveal that a novel phenomenon - called a eutectic reaction - occurred at the surface, causing intergranular melting capable of turning a solid steel girder into Swiss cheese. [...] The New York Times called these findings «perhaps the deepest mystery uncovered in the investigation.» [...]. This Swiss cheese appearance shocked all of the fire-wise professors, who expected to see distortion and bending - but not holes."

Joan Killough-Miller, "The «Deep Mystery» of Melted Steel," WPI Transformations Spring 2002


http://xoomer.virgilio.it/911_subito/concrete_molten.png


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