Adding resilience and robustness to the infrastructure vis-à-vis reducing risks related to disproportionate collapse of the structural framing system of a facility, has become a concern in the engineering design communities in several countries, but particularly in the U.S. The idea is to address a perceived weakness in design standards related to the potential for a framing system to fail given some extreme unanticipated loading. However, realizing some form of added protection from disproportionate collapse is not without its perils, particularly with respect to a clear statement of what is to be achieved and how it is to be accomplished. This paper describes some key aspects and complexities of the issues that need to be addressed and the difficulties associated with doing so.
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