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在建造桥梁时使用常备式結构作为拼装輔助設备,可以节約木材,減少劳动力,並且大大缩短施工期限。在桥梁工程实踐中作为承重的临时建筑物最广泛使用的是桥梁托辣斯的常备式钢框架脚手架(1939年)及建造桥梁的YNKM-55型万能常备式結构,但前者已停止制造,后者用作不同类型的脚手架、临时桥梁,吊机的杆件及建桥时的其他輔助建筑物。它由角钢断面的线形杆件及不同类型节点鈑及填鈑(29种拼装杆件及2种螺栓)組成。常备式结构是按徒手拼装设计的,所以大多数杆件重量輕(小于50公斤)。但由于用很多不同号码杆件
Using standing structures as assembly aids in the construction of bridges can save wood, reduce labor, and greatly reduce construction deadlines. The most widely used temporary load-bearing structure in bridge engineering practice is the Standing Steel Frame Scaffolding (1939) of Bridge Tops and the YNKM-55 Universal Standing Structure for the construction of bridges, but the former has stopped manufacturing, The latter is used for different types of scaffolding, temporary bridges, cranes and other auxiliary structures during bridge construction. It consists of angle bar section of the linear bar and different types of node sheet and fill sheet (29 kinds of assembly of bar and 2 kinds of bolts) composition. Standing structure is assembled by hand, so most of the bar is light (less than 50 kg). However, due to the use of many different numbers of bars