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detail - problem 6 |
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FEMA-Report Appendix on Swiss-Cheese Looking Steel Sample |
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FEMA's WTC Building Performance Study, Appendix C Limited Metallergical Study. As commented by 9/11Research, Appendix C describes observations, interesting from a forensic standpoint, that steel members were severly corroded by sulfidative attack. In an article by James Glanz and Eric Lipton, "A Search for Clues In Towers' Collapse; Engineers Volunteer to Examine Steel Debris Taken to Scrapyards," New York Times, February 2, 2002, the authors state, "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 |
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Eroded A36 wide-flange beam |
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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." (1) |
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The characteristic of severe corroding by sulfidative attack produces "Eutectic Steel." A short YouTube video probing this aspect was produced by Jonathan Cole, P.E., titled "9/11 Experiments: The Mysterious Eutectic Steel." |
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July 7, 2010 |
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