The Difference Between Space Frame and Pipe Trusses

 Steel structure is an indoor space structure made of multiple rods connected with each other according to a certain grid pattern based on nodes. It has the advantages of indoor space support, light weight, large bending rigidity, good performance of seismic grade; it can be used as the roof frame of stadiums, cinemas, exhibition halls, waiting halls, stadium infield canopies, airplane hangars, double-column mesh frame structure from the production workshop and other engineering buildings. The disadvantage is that the total number of rods converging on the nodes is more, and the fabrication installation is more complicated than the plan structure.

　　Truss structure is a floor plan or indoor space structure which is generally equipped with triangular modules composed of straight rods. Under the load effect, the truss structure rods can bear the radial tensile force or working pressure, and then the compressive strength of raw materials can be utilized flexibly, saving raw materials compared with the solid web beam when the span is very large, relieving the weight and expanding the bending stiffness, so it is suitable for the load carrying structure of very large span and the towering structure, such as the steel roof racks, the highway bridges, the electric power line towers, the telecommunication satellite transmitting towers, the water conservancy water conservancy locks, the lifting equipment racks, and so on.



Comparing with the net frame structure, tube truss structure omits the lower chord vertical rods and ball nodes of spherical net frame, which can consider various regulations of different building forms, especially the construction of round arches and random curves look more advantageous than the net frame structure. It has the same reliability in all directions and saves the usage of raw materials. Seamless steel pipe joist structure is developed in the basic development trend of net frame structure, and it has its distinctive advantages and applicability compared with the net frame structure, and the steel content of the structure is also more economical. Comparing with the traditional steel pipe joist with tensioned cross section (H-beam and I-beam), the raw material of pipe joist structure cross section is more uniformly distributed around the center axis, so that the cross section has excellent compressive strength and bending strength, torsion bearing capacity and great bending rigidity, no need of node plate, simple structure, and the key is that the pipe joist structure is beautifully designed, and it is favorable to the design of modeling and has a certain decorative design practical effect. Pipe Joist

The overall performance of pipe truss structure is good, with large bending rigidity and beautiful surface, and it is very easy to make, install, turn over, and hoist; the seamless steel pipe steel roof truss made of cold-drawn thick-walled channel steel has the advantages of light structure, good bending rigidity, saving stainless steel plate, and fully utilizing the raw material's compressive strength, etc. Especially, it is chosen in the software of the compression bar and support point system which is manipulated by the length to slenderness ratio to be more economic development.

　　At this stage, the choice of this type of structure of the housing construction base is attributed to commercial buildings. The structure has the characteristics of beautiful and generous modeling design (can be completed in the shape of a tablet PC, arc shape, random curve shape), easy to make and install, good structural reliability, roof frame bending rigidity, economic development and good use.

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