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?

电缆桥架承载能力的影响因素：

Factors affecting the bearing capacity of cable tray:

1、动载荷是指在电缆桥架安装和维护过程中施工和维护人员的重量。对于轻型索桥，一般不考虑动荷载，即不允许人站在桥上。如果需要考虑人站立，跨度应适当缩短。

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、静载荷是指放置在电缆桥架中的电缆种类、电缆数量、每根电缆的外径、重量/单位长度，并根据不同的电缆走线路线进行统计。

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、附加载荷仅指冰、雪、风和外界电磁力形成的载荷。它与安装地点的自然气象条件和装载体的性质有关。在设计中要根据各种条件进行计算。

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.

电缆桥架采用薄钢板冲压而成，承载能力有限，会因桥架过载而引起变形，不仅影响桥架美观，而且影响电缆的运行。通常情况下，电缆桥架的承载能力由其负载特性曲线表示。从负载曲线可以看出，负载能力与托盘的大小和支撑距离有关。对应相同距离的支撑和弯曲凸变形。横向高度大承载能力大在承载能力相同的情况下，相同规格的电缆桥架支撑距离小，弯曲变形小。

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.

桥架可以独立安装。当然，它们也可以安装在各种建筑物和管架上。它们具有许多特点和优点，因为它们不仅可以体现简单的结构和形状。既美观，又可以发挥配置灵活、维护方便等特点。

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.

因此，要保证电缆桥架的承载能力，材料很重要，但也需要好的设计和好的材料，两方面同时协调，才能保证产品的质量。所以一定要注意电缆桥架的承载能力，在保证电缆桥架承载能力的同时，也需要前期的设计和后续的材料保证。

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.