On August 1, 2007, the Interstate 35W (I-35W) bridge over the Mississippi River in Minneapolis, Minnesota USA, collapsed, resulting in 13 deaths and 145 injuries. The failure was attributed to a design flaw that resulted in weak gusset plates at connection. Gusset plates are metal plates commonly used as connections to transfer forces between structural members. A gusset plate and collapsed bridge deck truss section from this bridge are shown in Figures 1 and 2 respectively (NTSB, 2008). After this tragic collapse, researchers showed considerable interest in the strength, behavior and failure modes of steel gusset plate connections (Lehman et al., 2008; Higgins et al., 2013; Berman et al., 2012; Bucmys and Daniunas, 2015). Accident report of this bridge was prepared by (NTSB, 2008). The United States National Transportation Safety Board (NTSB) presented in the accident report that the cause of the failure was determined to be an under designed gusset plate at node U10, which failed due to sway buckling. After the failure, the Federal Highway Administration (FHWA) issued a design guide which uses a combination of buckling stress and column theory to predict the buckling load (FHWA, 2009).(Ocel et al., 2011) described the collapse and FHWA’s response to the recommendations intended to prevent similar failures in the future.