梯級式橋架適用環境：散熱需求較高的環境;電纜數量多，截面大，不易轉彎，防鼠需求不高的環境，如配電柜頂部電源電纜;豎井等電纜不易固定的環境。

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.

橋架挑選的特殊需求低壓動力電纜與操控電纜共用同一托盤或梯架時，相互間宜設置隔板;在托盤、梯架分支，引上、引下處宜有恰當的彎通;因受空間條件約束不方便裝設彎通或有特殊需求時，可選用軟接板、鉸接板;鋼制電纜橋架直線段長度超越30 m、鋁合金或玻璃鋼制電纜橋架長度超越15m時，宜設置彈性節，彈性縫應裝備彈性板;銜接兩段不一樣寬度或高度的托盤、梯架可裝備變寬或變高板。

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.

托盤式橋架適用環境電纜較多，需求散熱好且橋架自重輕的環境;對粉塵、污染防護需求不高的環境;公共通道或野外跨過道路段。

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.

槽式橋架適用環境需屏蔽電氣攪擾的電纜回路，或有防護外部影響(如油、腐蝕性液體、易燃粉塵等)的需求時;簡單積灰和其它需隱瞞的環境或野外場所。組合式橋架適用環境需求量體裁衣拼裝的場所，如大的變配電所。

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.