The cable tray supports the wires and cables during the installation of wires and cables. It can not only regulate the installation of wires and cables, but also protect them, so that the cable bridge has a certain bearing capacity. If there is no good bearing capacity, it will affect the practicability of the cable. So what three factors affect the bearing capacity of cable tray?
Factors affecting the bearing capacity of cable tray:
1. Dynamic load refers to the weight of construction and maintenance personnel during the installation and maintenance of cable tray. For light cable bridges, dynamic load is generally not considered, that is, people are not allowed to stand on the bridge. If people need to stand, the span should be shortened appropriately.
2. Static load refers to the type and quantity of cables placed in the cable tray, the outer diameter, weight / unit length of each cable, and statistics shall be made according to different cable routes.
3. The additional load only refers to the load formed by ice, snow, wind and external electromagnetic force. It is related to the natural meteorological conditions of the installation site and the nature of the loading carrier. The calculation shall be carried out according to various conditions in the design.
The cable tray is stamped with thin steel plate with limited bearing capacity, which will cause deformation due to overload of the cable tray, which will not only affect the beauty of the cable tray, but also affect the operation of the cable. Generally, the bearing capacity of cable tray is represented by its load characteristic curve. It can be seen from the load curve that the load capacity is related to the size and support distance of the tray. Support and bending convex deformation corresponding to the same distance. The transverse height is large and the bearing capacity is large. Under the condition of the same bearing capacity, the supporting distance of the cable tray of the same specification is small and the bending deformation is small.
The bridge can be installed independently. Of course, they can also be installed on various buildings and pipe racks. They have many characteristics and advantages because they can not only reflect simple structure and shape. It is not only beautiful, but also has the characteristics of flexible configuration and convenient maintenance.
Therefore, to ensure the bearing capacity of the cable tray, the material is very important, but it also needs good design and good materials. The two aspects should be coordinated at the same time in order to ensure the quality of the product. Therefore, we must pay attention to the bearing capacity of the cable bridge. While ensuring the bearing capacity of the cable bridge, we also need the early design and subsequent material guarantee.