The importance of material and form for stage building

In the first stage, truss, compressive brace length is short, narrow is relatively small, so not easy to flex, and the rod is available on the crack circle and chord connection, all the components of the wood can be saved. In addition, the first quarter of the truss made of a parabola, the chord length will be the same and the moment of change, not only the string stress equal material is relatively economic.

      secondly, it can be used in all components of all steel material production, can also be used steel components, the tension brace or drop by together with wood, but when use of wood defect is obvious, so most still use steel safe.