Structural name of Xi 'an Bailey steel frame bridge. Bailey steel bridge truss. Bailey bridge, also known as Bailey steel bridge, is a kind of steel truss bridge widely used in the world. It has the characteristics of simple structure, convenient transportation, few components, light weight, low cost, quick construction, easy disassembly, reusability, large bearing capacity, high structural rigidity and long fatigue life. According to the actual needs of different spans, temporary bridges, emergency bridges and fixed bridges of various types and uses can be formed.