梯级式桥架适用环境：散热需求较高的环境;电缆数量多，截面大，不易转弯，防鼠需求不高的环境，如配电柜顶部电源电缆;竖井等电缆不易固定的环境。

For the environment with large number of cable trays, it is not easy to fix the cable in the environment of large cable tray, such as the cable tray with high cable cross-section and not easy to be fixed in the environment of large cable tray.

桥架挑选的特殊需求低压动力电缆与操控电缆共用同一托盘或梯架时，相互间宜设置隔板;在托盘、梯架分支，引上、引下处宜有恰当的弯通;因受空间条件约束不方便装设弯通或有特殊需求时，可选用软接板、铰接板;钢制电缆桥架直线段长度超越30 m、铝合金或玻璃钢制电缆桥架长度超越15m时，宜设置弹性节，弹性缝应装备弹性板;衔接两段不一样宽度或高度的托盘、梯架可装备变宽或变高板。

When the low-voltage power cable and control cable share the same tray or ladder for bridge selection, partition boards should be set between each other; proper bending should be provided at the leading up and down points of the tray and ladder branch; flexible connection plate and hinged plate can be selected when it is not convenient to install bend due to space constraints or there is special demand; When the length of the straight section of the steel cable tray exceeds 30 m, and the length of the aluminum alloy or glass fiber reinforced plastic cable tray exceeds 15 m, the elastic joint should be equipped with an elastic plate; the tray and ladder connecting two sections with different width or height can be equipped with a widening or heightening plate.

托盘式桥架适用环境电缆较多，需求散热好且桥架自重轻的环境;对粉尘、污染防护需求不高的环境;公共通道或野外跨过道路段。

The tray type bridge is suitable for the environment with more environmental cables, good heat dissipation and light weight of the bridge; the environment with low demand for dust and pollution protection; and the public passage or outdoor cross aisle section.

槽式桥架适用环境需屏蔽电气搅扰的电缆回路，或有防护外部影响(如油、腐蚀性液体、易燃粉尘等)的需求时;简单积灰和其它需隐瞒的环境或野外场所。组合式桥架适用环境需求量体裁衣拼装的场所，如大的变配电所。

The trough type cable tray is suitable for shielding the cable circuit disturbed by electrical disturbance in the environment, or needs to protect external influence (such as oil, corrosive liquid, flammable dust, etc.), simple dust accumulation and other environment or field places that need to be concealed. The combined bridge is suitable for the environment, such as large power transformation and distribution station.