Precautions for cable tray installation:

1、橋架的總平面布置要做到到間隔短，經濟實惠合理化，運作，并應達到施工安裝，檢修和鋪設電纜線的規定。

1. The general layout of the bridge should be short, economical, reasonable and safe, and should meet the requirements of construction, installation, maintenance and cable laying.

2、橋架具備充足的彎曲剛度和抗壓強度，對電纜線給予可靠的支撐。

2. The bridge has sufficient bending stiffness and compressive strength to provide safe and reliable support for cables.

3、電纜敷設后，橋架的撓度應不得超過橋架跨距的1/200，當橋架的跨距≥6000毫米時，其撓度應不得超過橋架的跨距的1/150。

3. After cable laying, the deflection of the bridge shall not exceed 1/200 of the span of the bridge. When the span of the bridge is ≥ 6000 mm, the deflection shall not exceed 1/150 of the span of the bridge.

4、橋架應盡量在建、建筑物(如墻、柱、梁、樓板等)上安裝，與土建工程緊密配合。

4. The bridge shall be installed on the buildings (such as walls, columns, beams, floors, etc.) under construction, and closely cooperate with the civil engineering discipline.

5、橋架與制作工藝管道支架共架安裝時，橋架應擺放在管道支架的一側。

5. When the bridge is installed together with the manufacturing process pipe support, the bridge should be placed on one side of the pipe support.

6、橋架與各種各樣管道平行面搭建時，其凈間隔應達到以下規定：

6. When the bridge is built parallel to various pipelines, the net spacing shall meet the following requirements:

（1）橋架與一般制作工藝管道(如壓縮空氣管道等)平行面搭建時不小于400毫米。

(1) When the bridge is built parallel to the general manufacturing process pipes (such as compressed air pipes, etc.), it shall not be less than 400mm.

（2）橋架與有腐蝕性液體管道平行面搭建時不小于500毫米。

(2) When the bridge is built parallel to the corrosive liquid pipeline, it shall not be less than 500mm.

（3）橋架不適合在輸送有腐蝕性液體管道的下方或有腐蝕性氣體管道上方平行面安裝。當不能防止時，應不小于500毫米。且其間應用防腐隔板隔開。

(3) The bridge is not suitable to be installed in parallel below the pipeline transporting corrosive liquid or above the pipeline transporting corrosive gas. When it cannot be prevented, it shall not be less than 500 mm. And it shall be separated by anti-corrosion partition.

（4）橋架與供熱管道平行面搭建，供熱管道有隔熱材料時不小于500毫米，無隔熱材料時不小于1000毫米。

(4) The bridge shall be built parallel to the heat supply pipeline. When the heat supply pipeline has thermal insulation material, it shall not be less than 500mm, and when there is no thermal insulation material, it shall not be less than 1000mm.

（5）橋架不適合在供熱管道的上方平行面安裝，當不能防止需在供熱管道上方平行面安裝時，應不小于1000毫米，其間應采取有效的隔熱具體措施。

(5) The bridge is not suitable for installation on the parallel surface above the heat supply pipe. When it cannot be prevented from being installed on the parallel surface above the heat supply pipe, it should not be less than 1000mm, and effective heat insulation measures should be taken in between.

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