The installation of long-span cable tray is not a small project, so what precautions should we pay attention to when we work? Let's take a look with the manufacturers of cable tray with large span!

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

1. The general layout of long-span cable tray shall be short, economical and reasonable, and shall meet the provisions of construction, installation, maintenance and laying of cables.

2、橋架具備充足的彎曲剛度和抗壓強度,對電纜線給予更加可靠的支撐。

2. The bridge has sufficient bending stiffness and compressive strength to provide more 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 under construction (such as walls, columns, beams, floors, etc.) and closely cooperate with the civil works.

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 shall be placed on one side of the pipe support.

6、大跨距電纜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 long-span cable tray is built parallel to various pipelines, the net spacing shall meet the following provisions:

（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 pipeline (such as compressed air pipeline, 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 conveying corrosive liquid or above the pipeline conveying corrosive gas. When it cannot be prevented, it shall not be less than 500mm. And 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 heating pipeline. When the heating pipeline has thermal insulation materials, it shall not be less than 500mm, and when there is no thermal insulation materials, 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，其間應采取更好的隔熱具體措施。

(5) The bridge is not suitable to be installed on the parallel surface above the heating pipe. When it cannot be prevented from being installed on the parallel surface above the heating pipe, it shall not be less than 1000mm, and better specific thermal insulation measures shall be taken.

7、大跨距電纜橋架與各種各樣管道交叉時,其凈間隔應達到以下規定：

7. When the long-span cable tray crosses with various pipelines, the net spacing shall meet the following provisions:

（1）橋架與--般制作工藝管道交叉時,不小于300毫米。

(1) When the bridge crosses the general manufacturing process pipeline, it shall not be less than 300mm.

（2）橋架與有腐蝕性液體管道下方或有腐蝕性氣體管道上方交叉時，應不小于500毫米，且在交接處用防腐蝕蓋板將橋架維護起來,其蓋板長度應不小于d+2000毫米，(d為管道外徑)。

(2) When the bridge crosses below the corrosive liquid pipeline or above the corrosive gas pipeline, it shall not be less than 500mm, and the bridge shall be maintained with anti-corrosion cover plate at the junction. The length of the cover plate shall not be less than D + 2000mm, (D is the outer diameter of the pipeline).

（3）橋架與供熱管道交叉，供熱管道有隔熱材料時，應不小于500毫米無隔熱材料時，應不小于1000毫米，且在交接處應用隔熱材料(比如石棉板)將橋架維護起來，隔熱材料長度應不小于d+2000毫米(d為供熱管道隔熱材料的外徑)。

(3) When the bridge crosses with the heat supply pipeline, it shall not be less than 500mm when the heat supply pipeline has thermal insulation material, and not less than 1000mm when there is no thermal insulation material. The bridge shall be maintained with thermal insulation material (such as asbestos board) at the junction. The length of thermal insulation material shall not be less than D + 2000mm (D is the outer diameter of heat insulation material of heat supply pipeline).

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