Steel girder bridge, also known as Bailey Bridge. The Bailey Bridge is composed of lightweight, standardized truss unit components made of steel, including crossbeams, longitudinal beams, bridge decks, bridge abutments, and connecting parts. It can be rapidly assembled on-site using installation equipment into a truss girder bridge suitable for various spans and loads. Domestically, it is named as the assembled highway steel bridge, 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.