Big_D
Member
"The demolition contractor, Mark Loizeaux says the timing of when the explosions on the columns are set off is critical. He cannot see how thermite or any derivative of thermite could have been used to deliberately demolish Tower 7.
"I've never seen anyone use a material, which melts steel for demolition purposes. I don't see how you could possibly get all of the columns to melt through at the same time."
People who think thermite was used to demolish Tower 7 have also claimed that the one section of steel from the building that was kept reveals that it was melted by some strange substance. The half inch (1.3cm) steel beam has been entirely dissolved in parts. "
"Professor Sisson determined that the steel was attacked by a liquid slag which contained iron, sulphur and oxygen.
However, rather than coming from thermite, the metallurgist Professor Sisson thinks the sulphur came from masses of gypsum wallboard that was pulverised and burnt in the fires. He says:
"I don't find it very mysterious at all, that if I have steel in this sort of a high temperature atmosphere that's rich in oxygen and sulphur this would be the kind of result I would expect." "
BBC NEWS | Programmes | Conspiracy Files | Q&A: The collapse of Tower 7
Here are the two experts credentials:
Mark Loizeaux
"Mark Loizeaux is a demolition expert, and his company, Controlled Demolition Inc. in Phoenix, Md., has taken down more than 7,000 structures around the world by imploding them with explosive charges."
Washington Technology
Richard Sisson
"Richard D. Sisson Jr., George F. Fuller Professor of mechanical engineering at Worcester Polytechnic Institute (WPI) and director of WPI's Manufacturing Engineering and Materials Science and Engineering programs, has been named to the Academy of Engineering Excellence at Virginia Polytechnic Institute and State University (Virginia Tech). Sisson received a B.S. in materials engineering from the Institute in 1969...After graduating from Virginia Tech, Sisson worked briefly in industry before earning a master's (1971) and a Ph.D. (1975) in metallurgical engineering from Purdue University. He then spent two years as a research metallurgist for E. I. DuPont at the Savannah River Laboratory in Aiken, S.C., where he developed plutonium dioxide that acted as a heat source for nuclear batteries. In 1976, he joined the WPI faculty as Morgan Distinguished Assistant Professor of Mechanical Engineering.
He returned to Virginia Tech in 1979 as assistant professor of materials engineering, conducting research in the Institute's environmental degradation of engineering materials laboratory. After two years, he headed north to take a position as staff engineer for Exxon Chemical Co. in Florham Park, N.J. A year later, deciding that he preferred the challenges and rewards of academia, he rejoined the WPI faculty, where he was named a full professor in 1986. In addition to directing the Manufacturing Engineering and Materials Science and Engineering programs, Sisson served as interim head of WPI's Mechanical Engineering Department from 1999 to 2000."
Metal Processing Institute - Richard Sisson Named to Virginia Tech Academy of Engineering Excellence
