电缆桥架型式包括托盘式、槽式、梯级式，材质有铝合金、镀锌钢不锈钢、复合环氧树脂、拉挤玻璃钢等。根据使用区域的环境，腐蚀情况、防爆等级、防火等级、桥架内的电缆重量等因素，桥架选择原则如下:

Cable tray types include tray type, trough type, and stepped type, with materials including aluminum alloy, galvanized steel stainless steel, composite epoxy resin, extruded fiberglass, etc. Based on factors such as the environment of the usage area, corrosion situation, explosion-proof level, fire resistance level, and the weight of cables inside the cable tray, the selection principles for cable trays are as follows:

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(带盖板)。

1. When it is necessary to shield cable networks from electrical interference or when there is a requirement for external protection (such as corrosive liquids, flammable dust, etc.), (FB) type trough type composite anti-corrosion shielding cable trays (with cover plates) should be selected.

2、腐蚀性环境应采用铝合金、镀锌钢、玻璃钢电缆桥架，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，在容易积灰和其它需遮盖的环境或户外场所宜加盖板。

2. Aluminum alloy, galvanized steel, and fiberglass cable trays should be used for corrosive environments, and (F) type composite epoxy resin anti-corrosion and flame-retardant cable trays should be used for highly corrosive environments. The arm support bracket should also be made of the same material to improve the service life of the bridge and accessories. Cover plates should be added in environments or outdoor places that are prone to dust accumulation and other areas that need to be covered.

3、腐蚀严重的地区，潮湿的南方沿海地区应采用用铝合金电缆桥架，但需考虑其支撑间距(铝合金桥架支撑间距比镀锌钢小)

3. Aluminum alloy cable trays should be used in areas with severe corrosion and humid southern coastal areas, but their support spacing should be considered (the support spacing of aluminum alloy cable trays is smaller than that of galvanized steel)

4、除上述情况外，可根据现场环境及技术要求选用托盘式、槽式、梯级式钢质普通型桥架。在容易积灰和其它需遮盖的环境或户外场所宜加盖板。

4. In addition to the above situations, tray type, trough type, and step type steel ordinary cable trays can be selected according to the on-site environment and technical requirements. Cover plates should be added in environments or outdoor places that are prone to dust accumulation and require cover.

5、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。

5. When crossing public passages or outdoor road sections, it is advisable to add padding or use pallets at the bottom of the lower steps. When crossing public passages with large spans, the load capacity of the bridge frame can be increased or a scaffolding can be selected according to user requirements.

6、大跨距({>}3m)要选用复合型桥架(FB)。

6. Composite cable trays (FB) should be selected for large spans ({>} 3m).

7、户外要选用复合环氧树脂桥架(F)。

7. Choose composite epoxy resin bridge (F) for outdoor use.

8、要求桥架防火的区段，必须采用钢制或不燃、阻燃材料。

8. The section requiring bridge fire prevention must be made of steel or non combustible and flame-retardant materials.

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