Abstract: Under the standards established by the United States Supreme Court in Daubert v. Merrell Dow Pharmaceutical, Inc., 509 U.S. 579, 113 S. Ct. 2786, 125 L. Ed 2d 469 (1993) and its progeny, expert testimony offered to support the official theory and hypotheses concerning the…
Abstract: The importance of understanding the mechanisms of collapse for the three World Trade Center buildings on September 11, 2001 cannot be over-estimated, for these unusual collapses and their disputed causes raise questions regarding all future steel-frame building design. A literature review was conducted to identify…
Abstract: The seismic signals propagating from New York on September 11, 2001, recorded at Palisades (34 km) and published by the Lamont-Doherty Earth Observatory of Columbia University (LDEO), have here been subjected to a new critical study concerning their sources. The aim of this paper is…
Introduction: The “Analysis of Structural Response of WTC 7 to Fire and Sequential Failures Leading to Collapse” (McAllister et al. 2012) published by the American Society of Civil Engineers (ASCE) presents a complex procedure used to analyze the structural behavior of Seven World Trade Center (WTC…
“It is our contention that the conclusions proffered by the NIST report, if analyzed against data from within the report itself, demonstrate critical inconsistencies. The most obvious of these relates to the temperature at which the structural steel is likely to fail. The NIST report…
Abstract: The roof line of the North Tower of the World Trade Center is shown to have been in constant downward acceleration until it disappeared. A downward acceleration of the falling upper block implies a downward net force, which requires that the upward resistive force was…
Abstract: In the debate over the collapses of the Twin Towers on 9/11, the shaking of the earth that accompanied these collapses has played an important role. This shaking registered clearly on seismographs. Less clear, however, are its causes and the times it began. The National…
Abstract: In its Final Report on the Collapse of the World Trade Center Towers, the National Institute of Standards and Technology summarizes its three year study and outlines its explanation of the total collapse of WTC 1 and WTC 2. Readers of the report will find…
“Regardless of how thermite materials were installed in the WTC, it is strange that NIST has been so blind to any such possibility. In fact, when reading NIST’s reports on the WTC, and its periodic responses to FAQs from the public, one might get the…
Introduction: There have been a number of authors who have drawn attention to the improbability of certain reported events that led up to the disaster that has become known as 9/11, in which three major buildings at the World Trade Centre collapsed with heavy loss of…