1) Ji'nan cable tray in a fire in the section, the cable tray ladder, added with fire or flame retardant properties of the plate, net material enclosed or semi enclosed structure, and take on the bridge and the support surface coated with fireproof coating and other measures, the resistance should meet the national requirements relevant rules or standards.
2) cable bridge, line slot and support hangers are used in corrosive environment. They should be made of corrosion-resistant rigid materials or take anti-corrosion treatment. The way of anticorrosion treatment should meet the requirements of engineering environment and durability.
3) the specifications and sizes of various components and support frames should be matched with the line and bend series of the tray, the ladder frame and the staircase.
4) aluminum alloy cable bridge should not be used in places with higher fire protection requirements.
5)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。
5) for the steel cable bridge with span greater than 6m and the span length greater than 2m or the load bearing requirement is greater than the load grade D grade aluminum alloy cable tray, the strength, stiffness and stability of the aluminum alloy cable bridge should be calculated or verified according to the engineering conditions.
6) the selection of the width and height of the cable ladder should meet the requirement of filling rate. In the general case, the power cable should be 40% to 50%, and the control cable should be 50% to 70%, and the 10% to 25% engineering development allowance should be reserved.
7)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。
7) when selecting the load level of cable ladder rack, the uniformly distributed load of the cable tray should not be greater than the rated load of the selected cable bridge load grade. If the actual span of the support and hanger of the cable bridge is not equal to 2m, the uniform load should meet the requirements.
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