The Dr. Frank Greening library courtesy of 911myths.com
Dr Frank Greening (greening@sympatico.ca)
WTC Report - Dr Greening sent us an interesting study on the WTC collapse, covering such issues as how and why it began, the collapse time, momentum transfer theory, the energy involved in the impacts and the collapse itself (including that required to crush concrete), and more. (PDF file, updated February 16th 2006).
Energy Transfer Addendum - This companion to the WTC Report addresses other issues, including Jim Hoffmans claim that there was insufficient evidence from a gravity-driven collapse to pulverise concrete and create and expand the observed dust clouds. (PDF file).
NIST Report - Dr Greening has some questions of the NIST WTC report, though. Does it really provide a plausible mechanism to show how the process of global collapse was initiated? He points out some possible contradictions and other issues (PDF file).
WTC Thermite - Another Greening article suggests that perhaps a thermite reaction really did play a part in the collapse of the WTC... Though not for the reasons commonly assumed. (PDF file, updated 8th April 2006 with new observations on the molten metal pouring from 80th floor of WTC2).
Sulfur - Thermite (or thermate) is also commonly suggested as an explanation for the sulfur traces found on WTC steel, but it’s not the only one. In this paper Greening discusses other possible sources of sulfur in the WTC, and mechanisms for the observed sulfidation of the structural steel (PDF file, very minor update 15th May 2006 with one corrected reference).
Tipping of the Upper Section of WTC2 - did the tilting of the top of WTC2, immediately prior to collapse, really defy the laws of physics, as some might have you believe? Dr Greening explores the issue here. Beware: seriously technical, to be avoided if you’re even slightly math-phobic.
The Pulverization of Concrete in WTC 1 During the Collapse Events of 9-11 - ...are there any experimental data available to support the claim that concrete in the WTC could have been pulverized by gravity driven impact as opposed to explosive blasting? In this report we address these questions and after considering the available evidence conclude that the pulverization of WTC concrete by gravitational collapse of each tower was indeed quite possible. Furthermore, we show that the predicted concrete particle size distribution is consistent with observations of the concrete debris at, and adjacent to, ground zero.
