Selection of cable tray type and variety

电缆桥架，简而言之是安装在建筑物外露天的桥架，全部零件均需进行镀锌处理。一共可分为槽式、托盘式和梯架式、网格式等结构，由支架、托臂和安装附件等组成。

Cable tray, in short, is a tray installed in the open air outside the building, and all parts need to be galvanized. It can be divided into slot type, tray type, ladder type, mesh format and other structures, which are composed of support, bracket and installation accessories.

电缆桥架大致地可分为以下五类

Cable trays can be roughly divided into the following five categories

1、槽式电缆桥架

1. Trough type cable tray

槽式电缆桥架属于全封闭型电缆桥架，该种电缆桥架能够被广泛适用于敷设计算机电缆、热电偶电缆及其他高灵敏系统的控制电缆等，能够很好地控制电缆的屏蔽干扰，对重腐蚀中环境电缆的防护起到了很好的作用与效果。

The grooved cable tray is a fully enclosed cable tray. This kind of cable tray can be widely used to lay computer cables, thermocouple cables and control cables of other highly sensitive systems. It can well control the shielding interference of cables and play a good role and effect in the protection of cables in heavily corrosive environment.

2、梯级式电缆桥架

2. Stepped cable tray

T型梯级式电缆桥架适用于直径较大电缆的敷设，能够同时适用于高、低压动力电缆的敷设，是根据国内外有关资料而改进设计的，该类型的电缆桥架具有重量轻、成本低、散热、透气好等特性。

T-type stepped cable tray is applicable to the laying of cables with large diameter and can be applied to the laying of high and low voltage power cables at the same time. It is improved and designed according to relevant data at home and abroad. This type of cable tray has the characteristics of light weight, low cost, good heat dissipation and air permeability.

3、大跨距电缆桥架

3. Long span cable tray

该种大跨距电缆桥架一般是由拉挤玻璃钢型材组装而成，能够适用于电力电缆、控制电缆、照明电缆及配件等。比铁制桥架的使用寿命长并且安装方便，成本低，不仅拥有切割方便，而且基本不需要维护。

The long-span cable bridge is generally assembled from pultruded FRP profiles, which can be applied to power cables, control cables, lighting cables and accessories. It has longer service life than iron bridge, convenient installation and low cost. It not only has convenient cutting, but also basically does not need maintenance.

4、组合式电缆桥架

4. Combined cable tray

该种电缆桥架是一电缆桥架系列中的二代产品，能够广泛地适用各项工程、各种单位、各种电缆的敷设。组合式电缆桥架只需生产弯通、三通等配件便能够根据现场安装任意转向、变宽、分引上、引下。在任意部位、不需要打孔、焊接就可用管引出。既方便生产运输、又方便安装施工，是电缆桥架中理想的产品。

This kind of cable tray is the second generation product in a cable tray series, which can be widely used for the laying of various projects, various units and various cables. The combined cable tray only needs to produce bend, tee and other accessories, which can be turned, widened, led up and down arbitrarily according to the on-site installation. At any position, it can be led out by pipe without drilling and welding. It is not only convenient for production and transportation, but also convenient for installation and construction. It is an ideal product in cable tray.

5、托盘式电缆桥架

5. Tray type cable tray

该电缆桥架是石油、化工、轻工等方面应用广泛的一种，具有很强的共同性，该种电缆桥架不仅仅适用于动力电缆的安装，同时也能够适合于控制电缆的敷设。

The cable bridge is widely used in petroleum, chemical industry, light industry and other fields, and has strong commonality. The cable bridge is not only suitable for the installation of power cables, but also suitable for the laying of control cables.

1、需屏蔽电气干扰的电缆网路或有防护外部（如：有腐蚀液休，易燃粉尘等环境）影响的要求时，应选用（FB）类槽式复合型防腐屏蔽电缆桥架（带盖）

1. When the cable network that needs to shield electrical interference or there are requirements to protect the impact of external (such as corrosive liquid, flammable dust and other environments), the (FB) grooved composite anti-corrosion shielded cable bridge (with cover) shall be selected

2、强腐蚀性环境应采用（F）类复合环氧树脂防腐阻燃型电缆桥架。托臂、支架也要选用同样材料，提高桥架及附件的使用寿命，电缆桥架。在容易积灰和其它需遮盖的环境或户外场所宜加盖板。

2. Class (f) composite epoxy resin anti-corrosion and flame retardant cable tray shall be used in highly corrosive environment. The same materials shall be selected for the supporting arm and support to improve the service life of the bridge and accessories and the cable bridge. Cover plate should be added in the environment or outdoor places where ash is easy to accumulate and other places to be covered.

3、除上述情况外，可根据现场还环境及技术要求选用托盘式、槽式、梯级式、玻璃防腐阻燃电缆桥架或钢质普通型桥架。在容易积灰和其它需遮盖的环境或户外场所宜加盖板。

3. In addition to the above conditions, tray type, trough type, step type, glass anti-corrosion and flame retardant cable tray or steel ordinary cable tray can be selected according to the site environment and technical requirements. Cover plate should be added in the environment or outdoor places where ash is easy to accumulate and other places to be covered.

4、在公共通道或户外跨越道路段，底层梯级的底部宜加垫板或在该段使用托盘。大跨距跨越公共通道时，可根据用户要求提高桥架的载荷能力或选用行架。

4. In the public passage or outdoor crossing road section, the base plate should be added at the bottom of the bottom step or the pallet should be used in this section. When crossing a public passage with a long span, the load capacity of the bridge can be improved or the traveling frame can be selected according to the user's requirements.

5、大跨距（>3m）要选用复合型桥架（FB）。

5. Composite bridge (FB) shall be selected for large span (> 3M).

6、户外要选用复合环氧树指桥架（F）。

6. Composite epoxy tree finger bridge (f) shall be selected for outdoor.