Steel truss design must abide by seven principles!

1. The design of steel structure truss should first meet the requirements of production technology, building function and type, and on this basis make the structure reasonable, safe and reliable, and economical. For this reason, structural designers should fully understand the production process and the requirements of architectural functions and art in order to agree the most reasonable program with craft and construction personnel.

2, steel structure truss design, from the actual construction of steel structure truss, considering the material supply and construction conditions, reasonable selection of materials, to meet the requirements of strength, stability and stiffness in the process of transportation, installation and use of the structure, but also meet the fire standards, pay attention to the anti-corrosion requirements of the structure. In terms of technical and economic indicators, it is necessary to compare multiple schemes according to the main factors such as material saving, labor productivity improvement, transportation cost reduction and installation workload reduction in order to shorten the construction period, and form the best scheme of comprehensive economic indicators by analyzing and grasping the main contradiction according to the specific situation.

3, in the selection and determination of structural form and component section, should also improve the comprehensive squeeze benefit, not due to the gain and loss of a component and affect the overall economic indicators.

4, where possible, gradually to the structure of the standardization, component and joint standardization direction.

5. Follow the principle of centralized use of materials, that is, properly expand the column distance to make the load-bearing structure large, reduce the number of components, and concentrate the steel on the structure bearing the main street load.

6, on the premise of ensuring the safety and reliability of the structure, the implementation of the principle of functional annexation, that is, a component can bear a variety of functions at the same time, such as both bearing and enclosure of the structure or both bearing components and stability of the system, etc.

7, in the steel selection should consider the working conditions of the structure, (such as stress, temperature and the surrounding medium environment, etc.) material supply and processing factors. All kinds of various levels of steel should be fully sent to throw its role, do each in its proper place. Make the most of everything. Two different grades of steel are allowed in one member. In the use of new materials, the emphasis is on promoting the use of high-efficiency steel.