Steel girder bridge, also known as Bailey Bridge. The Bailey Bridge is composed of lightweight, standardized truss unit components made of steel, including cross beams, longitudinal beams, bridge decks, abutments, and connecting elements, which can be rapidly assembled on-site using installation equipment into truss girder bridges suitable for various spans and loads. Known domestically as prefabricated highway steel bridges, it is a type of steel bridge but not identical to it. The Bailey Bridge is highly representative, with its main feature being modularity, ease of application, and wide usage.