The cable tray has the advantages of advanced technology, beautiful appearance, smooth appearance, common thickness, high mechanical strength, convenient equipment, corrosion resistance and aging. It has the rigidity of metal bridge and resistance of bridge, good corrosion resistance, strong weathering resistance, beautiful appearance, convenient equipment and long service life.

在选择电缆桥架时，请注意以下六个基本要素：

When selecting cable tray, please pay attention to the following six basic elements:

1)在选择电缆桥架荷载等级时，桥梁的任务均匀荷载不应大于所选电缆桥架荷载等级的附加均匀荷载。当桥梁支座的实际跨度不等于2m时，应满足任务均匀荷载的要求。

1) When selecting the load level of cable tray, the task uniform load of bridge should not be greater than the additional uniform load of the selected load level of cable tray. When the actual span of bridge bearing is not equal to 2m, it should meet the requirements of uniform load.

2)在满足相应荷载的条件下，各种构件和支座的规格标度应与塔板的直线截面和弯曲级数相匹配。

2) Under the condition of meeting the corresponding load, the specification scale of various components and supports should match the straight section and bending series of the tray.

3)电缆梯形、塔板宽度、塔板高度的选择应满足填充率的要求。在一般情况下，电缆梯盘填充率为40%≤50%，控制电缆50%≤70%，施工10%≤25%。

3) The selection of cable trapezoid, tray width and tray height should meet the requirements of filling rate. In general, the filling rate of cable tray is 40% ≤ 50%, control cable 50% ≤ 70% and construction 10% ≤ 25%.

(4)在腐蚀环境中使用电缆桥架、线槽及其支架时，应选择刚性的耐腐蚀数据，或采取防腐处理，并满足工程环境和耐久性的要求。

(4) When using cable tray, trunking and their supports in corrosive environment, rigid corrosion resistance data or anti-corrosion treatment shall be selected to meet the requirements of engineering environment and durability.

(5)在具有防火请求的截面上，电缆桥架可将耐火或耐火板、网等数据添加到索梯和塔板上，形成封闭或半封闭布置，并采用在桥面及吊架上涂装防火的方法。其所有耐火功能均应符合有关规范或规范.

(5) On the section with fire protection request, the data of fire-resistant or fire-resistant plate and net can be added to the cable ladder and tower plate to form a closed or semi closed layout, and the fire protection method can be applied on the bridge deck and hanger. All the fire resistance functions should conform to the relevant specifications

6)在工程防火要求较高的地方不应选用电缆桥架铝合金。

6) Aluminum alloy for cable tray should not be used in places with high fire protection requirements.