The plane or space load-bearing component composed of several straight rods is usually triangular. Under the load effect, the truss members mainly accept axial pressure or tension, which can make full use of the strength of the data. When the span is large, it can save data compared with the web beam, reduce its own weight, and increase the rigidity.

Therefore, it is suitable for large-span load-bearing structures (such as roofs, supporting trusses, floor truss beams, bridges, crane bridges) and upright structures (such as transmission line towers, wireless towers, satellite transmission towers). Introduction to truss Others such as hydraulic gates and crane frames can also choose truss. The disadvantage is that the amount of labor during manufacturing is large, and the structure itself occupies a large amount of building space.

According to the different mechanical properties, the classification aluminium crowd control barrier can be divided into statically indeterminate truss and super statically indeterminate truss. aluminium crowd control barrier is usually used in housing construction. According to the force characteristics, it can be divided into plane truss and space truss. The former is that the members and the load are in the same plane, and the latter may not be in the same plane.

According to the data used, it can be divided into steel truss, reinforced concrete truss, prestressed concrete truss, wood truss, steel and wood combined truss, steel and concrete combined truss. According to the shape of the truss, it can be divided into triangular truss, trapezoidal truss, parallel chord truss and polygonal truss. According to the selected web member mode, it can be divided into oblique web truss and non-oblique web truss, that is, open web truss.

Triangular truss. The editor of the aluminium crowd control barrier manufacturer suggests that under node loads evenly distributed along the span, the axial force of the upper and lower chords is larger at the end points and gradually decreases toward the span; the axial force of the abdominal rods is opposite. Triangular trusses are mostly used for roof trusses with tiled roofs due to the different internal forces of chords and unreasonable data consumption.