7 World Trade Center Collapse Investigation

Guy Nordenson and Associates was the strategic leader of a team of engineering experts involved in litigation related to the collapse of 7 World Trade Center, the 47-story steel-framed office building that collapsed on 11 September 2001 from terrorist attacks. In addition to coordinating experts’ research, GNA evaluated the structural code compliance of the building and analyzed the local connection failure mechanism and column buckling that likely resulted from the effects of the impact-initiated fire. To study the behavior of the building after the initial local failure and determine how it progressed to a catastrophic collapse, GNA also performed a staged nonlinear global collapse analysis.