Truss is the strongest one with high reusability, but its only disadvantage is high transportation cost. Products are divided into square tubes and round tubes.

2, folding truss:

The biggest advantage is low transportation cost and less reusability. Products are divided into square tubes and round tubes.

3, butterfly truss:

Truss is the most artistic one, with peculiar and beautiful shape.

4, the ball joint truss:

Also known as the spherical joint frame, it has beautiful shape and good robustness, and is also the most expensive truss.

From the mechanical analysis of extended data, when the truss shape is similar to the bending moment diagram of simply supported beam, the upper and lower chord axial forces are evenly distributed, the web axial forces are small and the materials are the least; From the aspects of materials and manufacturing, it is suggested that wood truss adopt triangle, steel truss adopt trapezoid or parallel chord, and reinforced concrete and prestressed concrete truss adopt polygon or trapezoid.

Generally, the height-span ratio of trusses is: three-dimensional truss1116, three-dimensional arch 1/20~ 1/30, and tensed three-dimensional arch 1/30. Trusses are widely used. When choosing the truss form, the purpose, material, support mode and construction conditions of the truss should be considered comprehensively. The principle of choosing the best form is to minimize the materials and labor used in manufacturing and installation on the premise of meeting the use requirements.

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