Lateral buckling is one of the most important factors in the design of steel plate girder. This buckling in the girder can be
controlled by many methods. The most popular method is to add the intermediate bracing systems along the length of girder. The
unsafely designed intermediate bracing systems can easily lead to serious consequences in the construction stage due to lateral
buckling by torsion which happens rapidly and suddenly when the internal force in girder exceeds the ultimate value.