【New】The principle of determining the form of the truss

The principle of determining the form of the truss:

With the continuous expansion of the truss market, people's demand for trusses is also growing, but due to the lack of expertise in truss, many customers have taken a detour. The author below explains the best form of professional choice for truss on this issue:

1. Firstly, from the mechanical analysis, when the truss shape is similar to the bending moment diagram of the simply supported beam, the axial force distribution of the upper and lower chords is uniform, the axial force of the abdominal rod is small, and the materials are the most economical;

2. From the aspect of material and manufacturing, the wooden truss is made into a triangle, the truss adopts a trapezoidal or parallel string shape, and the reinforced concrete and the prestressed concrete truss are polygonal or trapezoidal.

3. The ratio of the height to the span of the truss is usually 1/6 to 1/12, which is specified in the design manual and specifications.

Due to the wide range of use of trusses, the use, materials and supporting methods and construction conditions of trusses should be considered in the selection of truss form. The selection principle of the best form is to make the manufacture and installation under the premise of meeting the requirements. Material and labor are minimal.