CTLGroup was retained to evaluate structural steel plate material and connections during construction while structural steel tubular members were erected to support the scoreboard at the north end of the stadium. While inserting bolts into the end plate/gusset plate connection, the end plate fractured in a brittle fashion between the bolt hole and the edge of the plate. Subsequently, a second fractured plate was discovered and removed from the structure.
Based on conversations with key personnel, CTLGroup performed a cursory review of the erection sequence and procedures being used by the supply firm at the time the plate fractured. CTLGroup determined that the erection procedures being used were commonly accepted methods.
Our investigation indicated that the fractures occurred during a common erection procedure performed at low temperatures due to the presence of the inclusions. Additional testing was recommended to further define the behavior of the plate material under the service conditions.
