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For over 20 years, PEC personnel have played a significant role in the development and application of design approaches for progressive collapse resistance, beginning with the engineering community’s response to the Oklahoma City bombing.  Our research continues to this day and a recent paper from this work was published in the ASCE Journal of Performance of Constructed Facilities; the authors are Kirk Marchand and David Stevens and the paper is entitled “Progressive Collapse Criteria and Design Approaches Improvement”.

Methods for the assessment of structural designs or existing structural systems for susceptibility to progressive collapse and prescriptive methods to mitigate progressive collapse have been developed and implemented by numerous US organizations, including the Department of Defense (DoD), General Services Administration (GSA), and the Department of Veterans Affairs (VA); the ASCE Structural Engineering Institute is currently developing a standard for disproportionate collapse.  The DoD guidelines have been updated three times since inception, and GSA guidance was recently updated to take advantage of the DoD improvements through adaptation of DoD methods within GSA applicability requirements. This paper provides updates on the steadily converging approaches and documents.  Specifics of analysis updates and the cost implications of different methods and strategies are presented and discussed in the paper.

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