Generally speaking when members carrying small, span, the use of aluminum for the beams have to save steel truss, light weight, full use of the advantages of the material. At the same time, easy to transport and install aluminum truss, easy to control the deformation manufacturing. But aluminum truss nodes are connected by short weld and assembly costs of working hours, it is difficult using automated, high efficiency welding method, which increases the manufacturing costs. Therefore, span greater than 30m, when the load is small, the use of aluminum trusses are more economical. Now the structural strength, welding stress and deformation, welding production process, to review the process of the aluminum truss structure. Analyzed in two major areas: First, the structural strength aspects: First, the choice of materials and structural dimensions of the structure of 50mm × 5mm angle iron, mild steel material. In order to ensure the strength, plate thickness 8mm, both sides of the steel pipe having a diameter of 57mm, a wall thickness of not less than 4mm: Next, the structure provided in the connecting plate, connecting plate using aluminum truss nodes, can weld without too dense, and sufficient weld length to meet the strength requirements. The angle and steel connections, also used webs. Second, from the direction of the production process analysis: first choice of welding materials and welding methods due to shorter weld aluminum truss structure, usually manual arc welding material selection J 422 (or J426). Secondly, because the joint form aluminum truss structure loads, in addition to consider the convenience of assembly welding, groups and the use of lap joints. With fillet welds. Welding foot height 5mm .. Finally, to reduce the amount of labor power and improve production rate make webs to facilitate processing, reduce the workload, the interconnector shape as simple as possible, cutting the fewer the number of rape. In order not to add additional stress, symmetrical structure of a regular octagon structure rather than square. www.dengguangjia66.com