1) When cable tray, trunking and its supports and hangers are used in corrosive environment, they shall be made of corrosion-resistant rigid materials, or anti-corrosion treatment shall be adopted. The anti-corrosion treatment shall meet the requirements of engineering environment and durability.
2) In the section with fire protection requirements for cable tray, plates, nets and other materials with fire resistance or flame retardant performance can be added in the cable ladder and tray to form a closed or semi closed structure, and measures such as painting fire retardant coating on the surface of the bridge and its supports and hangers shall be taken. The overall fire resistance shall meet the requirements of relevant national codes or standards.
3) In places with high fire protection requirements, aluminum alloy cable tray should not be used.
4) The selection of cable ladder width and height should meet the requirements of filling rate. In general, the filling rate of cable ladder can be 40% to 50% for power cables, 50% to 70% for control cables, and a 10% to 25% engineering development margin should be reserved.
5)在选择电缆梯架的荷载等级时，电缆桥架的工作均布荷载不应大于所选电缆桥架荷载等级的额定均布荷载，如果电缆桥架的支吊架的实际跨距不等于2m 时，则 工作均布荷载应满足要求。
5) When selecting the load level of cable ladder, the working uniform load of cable tray shall not be greater than the rated uniform load of the selected load level of cable tray. If the actual span of the supports and hangers of cable tray is not equal to 2m, the working uniform load shall meet the requirements.
6) Under the conditions of meeting corresponding loads, the specifications and dimensions of various components and supports and hangers should match the straight section and bending series of trays and ladders
7) When selecting the bending or leading up and down device of cable tray, it shall not be less than the minimum allowable bending radius of cable in cable tray.
8)对于跨距大于6m 的钢制电缆桥架和跨距大于2m 或承载要求大于荷载等级D级的铝合金电缆桥架，应按工程条件进行强度、刚度及稳定性的计算或试验验证。
8) For steel cable tray with span greater than 6m and aluminum alloy cable tray with span greater than 2m or bearing requirement greater than load level D, strength, stiffness and stability shall be calculated or tested for verification according to engineering conditions.
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