Steel pontoon bridge, also known as Bailey Bridge. The Bailey Bridge consists of lightweight, standardized truss units made of steel, including beams, girders, bridge decks, abutments, and connecting elements, which can be rapidly assembled on-site using installation equipment to form truss beam bridges suitable for various spans and loads. Domestically, it is named as assembled highway steel bridge, a type of steel bridge, but it is not identical to a steel bridge. The Bailey Bridge is highly representative, with its main feature being modularity, ease of application, and wide usage.