There are many kinds of aluminum alloy cable trays, such as stainless steel, aluminum alloy, ladder, net, etc. They consist of brackets, brackets and mounting accessories. It is considered that the bridge can be used alone or connected with various engineering buildings (structures) and water pipe supports. It has the characteristics of simple structure, beautiful design, flexible equipment and convenient maintenance.

1.在工程设计中，桥梁应根据经济合理性、技术应用可行性、运行稳定性等因素综合考虑，然后明确方案，这也需要满足安装、维护和电缆敷设的要求。

1. In the engineering design, the bridge shall be comprehensively considered according to the economic rationality, technical application feasibility, operation stability and other factors, and then the scheme shall be defined, which also needs to meet the requirements of installation, maintenance and cable laying.
 

2.水平敷设的桥架距路面的高度一般不小于2.5米，距路面1.8米以下的垂直桥架应覆盖防护金属罩，专用于电气设备的房间除外。铝合金电缆桥架敷设在设备夹层或道路内应小于2.5m，并应采取接地保护措施。

2. The height of the horizontally laid bridge from the road surface is generally not less than 2.5m, and the vertical bridge less than 1.8m from the road surface shall be covered with protective metal cover, except for the room dedicated to electrical equipment. The aluminum alloy cable tray shall be less than 2.5m laid in the equipment interlayer or road, and grounding protection measures shall be taken.

3.桥架、线槽及其支吊架在腐蚀性刺激性区域的环境中使用时。应采用防腐处理，防腐处理应满足项目区域的环境和耐久性要求。适用于耐腐蚀规定或洁净场所，应选用铝合金电缆桥架。

3. When the bridge, trunking and its supports and hangers are used in the environment of corrosive and irritating areas. Anti corrosion treatment shall be adopted, which shall meet the environmental and durability requirements of the project area. Aluminum alloy cable tray shall be selected for corrosion resistance regulations or clean places.

4.在防火规定范围内，电缆梯架、桥架应增加具有耐火或阻燃功能的板、网等材料，形成封闭或半封闭结构，并采取桥架、支架表面喷涂防火涂料等对策。整体耐火功能应满足相关法律、法规、规范或标准的要求。铝合金电缆桥架不应用于耐火要求高的场所。

4. Within the specified scope of fire prevention, the cable ladder and bridge shall be added with plates, nets and other materials with fire-resistant or flame-retardant function to form a closed or semi closed structure, and the countermeasures such as spraying fire-retardant coating on the surface of bridge and support shall be taken. The overall fire resistance function shall meet the requirements of relevant laws, regulations, specifications or standards. Aluminum alloy cable tray shall not be used in places with high fire resistance requirements.

5.对于需要屏蔽电缆线路的电磁干扰或室外阳光、油、腐蚀性刺激性液体和易燃粉尘等外部保护功能的区域环境的规定，不得使用孔铝合金电缆桥架。

5. Perforated aluminum alloy cable trays shall not be used in areas requiring shielding electromagnetic interference of cable lines or external protection functions such as outdoor sunlight, oil, corrosive irritant liquid and flammable dust.

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