The difference between a grid and a tube truss

 The  space frame structure is an indoor space structure composed of multiple struts connected to each other according to a certain space frame pattern. It has the advantages of indoor space support, light weight, large bending stiffness and good seismic grade performance. It can be used as the roof truss of sports venues, cinemas, exhibition halls, waiting halls, sports venues infield canopy, hangars, double pillar space frame structure from production workshops and other engineering buildings. The disadvantage is that the total number of rods deposited on the node is more, and the structure of the installation is more complicated than that of the plan.

A truss structure is a floor plan or interior space structure consisting of straight rods, generally with triangular modules. Under the load effect, the key member of the truss structure bears the radial tensile force or working pressure, and then can flexibly use the compressive strength of raw materials. Compared with the solid belly beam, it saves raw materials when the span is very large, alleviates the weight and expands the bending stiffness, so it is suitable for the load structure and tower structure with a large span. Such as steel roof truss, highway bridge, power line tower, communication satellite tower, water conservancy gate, lifting equipment frame and so on.



Compared with the space frame structure, the tube truss structure avoids the vertical bar and the ball node of the spherical space frame, and can consider the provisions of a variety of different architectural forms, especially the construction of circular arches and random curves have more advantages than the space frame structure. Its directional reliability is the same, saving the use of raw materials. Seamless steel truss structure is in the basic development trend of the space frame structure, compared with the space frame structure has its unique advantages and applications, and the steel content of the structure is also more economic development. Compared with the traditional open-mouth cross section (H-shaped steel and I-shaped steel) steel pipe truss, the raw materials of the cross section of the pipe truss structure are more evenly distributed around the central axis, so that the cross section has excellent compressive strength, bending strength and torsion bearing capacity and great bending stiffness, no node plate is required, the structure is simple, and the key is the appearance design of the pipe truss structure is beautiful and generous. It is conducive to the modeling design and has a certain decorative design practical effect. Pipe girder

The overall performance of the frame structure is good, the bending stiffness is large and the surface is beautiful and generous, and it is very easy to make, install, turn over and lift. The seamless steel tube roof truss made of cold-drawn thick-wall channel steel has the advantages of light structure, good bending stiffness, saving stainless steel sheet, and making full use of the compressive strength of raw materials, especially in the pressure rod and support point system software controlled by the slenderness ratio.

At present, the building foundation of this type of structure belongs to commercial buildings. The structure has the characteristics of beautiful design (can be completed tablet computer shape, circular arc, random curve shape), convenient installation, good structural reliability, roof truss bending stiffness, easy to use in economic development.

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What is the truss welding method?

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