1. In the design of construction projects, the layout of cable tray should be based on the rationalization of economic development, technical feasibility analysis, operational safety factor and other factors to make a comprehensive comparison, so as to clarify the plan, and also fully consider the provisions of engineering construction and installation, maintenance and repair, and cable laying.

2.济南电缆桥架水准铺设时距路面的高宽比一般不少于2.5m,竖直铺设时距路面1.8m下列一部分需加金属材料后盖板维护，但铺设在电气设备专用型屋子里时以外。电缆桥架水准铺设在机器设备隔层或马道且小于2.5m，应采用接地保护对策。

2. When laying cable tray horizontally, the height width ratio from the pavement is generally not less than 2.5m. When laying vertically, the part below 1.8m from the pavement needs to be maintained with a metal material back cover plate, except when it is laid in a special room for electrical equipment. If the cable tray is horizontally laid on the machine equipment compartment or catwalk and is less than 2.5m, grounding protection measures shall be taken.

3.电缆桥架、电线槽以及抗震支架应用在有腐蚀自然环境中，应选用抗腐蚀的刚度原材料生产制造。或采用耐腐蚀解决，耐腐蚀处理过程应考虑工程项目自然环境和使用性能的规定。对耐蚀性能规定较高或规定清洁的场地，宜采用铝合金型材电缆桥架。

3. cable tray, wire trough and seismic support shall be manufactured with corrosion-resistant rigid raw materials when they are used in corrosive natural environment. Alternatively, corrosion-resistant solutions can be used, and the corrosion-resistant treatment process should take into account the natural environment and performance requirements of the project. For the site with high corrosion resistance or clean requirements, aluminum alloy cable tray should be used.

4.电缆桥架在有防火安全规定的路段内，可在电缆桥架，拖盘内加上具备防火或阻燃特性的板，网等原材料组成封闭式或封闭式式构造，并采用在电缆桥架以及抗震支架表层刷涂防火安全镀层等对策。其总体防火特性应考虑相关法律法规标准或规范的规定。在工程项目防火安全规定较高的场地.不适合选用铝合金型材电缆桥架。

4. In the road section with fire safety regulations for cable tray, raw materials such as plates and nets with fire or flame retardant characteristics can be added in the cable tray and tray to form a closed or enclosed structure, and countermeasures such as brushing fire safety coating on the surface of cable tray and seismic support can be taken. The overall fire protection characteristics should consider the provisions of relevant laws, regulations, standards or specifications. The aluminum alloy cable tray is not suitable for the site with high fire safety regulations of the project.

5.必须屏蔽掉干扰信号的电缆线路线.或者有安全防护外界危害如室外光照，油，腐蚀液體、易燃性烟尘等自然环境规定时.应取用没孔金属托盘电缆桥架。

5. The cable route that interferes with the signal must be shielded, or when there are natural environmental regulations for safety protection against external hazards such as outdoor light, oil, corrosive liquid, flammable smoke and dust, the perforated metal tray cable tray shall be used.

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