The Collapse of World Trade Center 7: Revisited

Why Did the World Trade Center Collapse ?

Each tower of the World Trade Center was designed to withstand, as a whole, the horizontal impact of a large commercial aircraft. Why, then, did total collapse occur? Zden ek P. Ba zant, Walter P. Murphy Professor of Civil Engineering and Materials Science at Northwestern University, and Yong Zhou, a graduate research assistant at Northwestern, suggest that the collapse was the dynamic conseque...

Granulomatous pneumonitis following exposure to the World Trade Center collapse.

We describe a 37-year-old male engineer who presented with cough and dyspnea 3 weeks after exposure to dust resulting from the collapse of the World Trade Center (WTC). Radiographs of the chest and high-resolution CT demonstrated diffuse miliary nodularity. Lung biopsy specimens confirmed the presence of diffuse, noncaseating granulomatous nodules. Scanning electron microscopy and energy-disper...

Why Did the World Trade Center Collapse?—Simple Analysis

This paper presents a simplified approximate analysis of the overall collapse of the towers of World Trade Center in New York on September 11, 2001. The analysis shows that if prolonged heating caused the majority of columns of a single floor to lose their load carrying capacity, the whole tower was doomed. DOI: 10.1061/~ASCE!0733-9399~2002!128:1~2! CE Database keywords: New York; New York City...

The legacy of World Trade Center dust.

Inferno at the World Trade Center, NY

9-11: The fateful date As in the morning hours of September 11, 2001 I was anxiously watching on TV the dramatic events taking place in Ne w York City, and saw the two World Trade Center towers engulfed in immense flames brought about by terrorists who deliberately crashed two passenger jets into them, my training in Structural Engineering instantly elicited in me visions of doom, and a feeling...