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、大跨距电缆桥架的总平面布置要做到到间隔短,经济实惠合理化，并应达到施工安装,检修和铺设电缆线的规定。

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、桥架具备充足的弯曲刚度和抗压强度,对电缆线给予更加可靠的支撑。

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

3、电缆敷设后,桥架的挠度应不得超过桥架跨距的1/200，当桥架的跨距≥6000毫米时，其挠度应不得超过桥架的跨距的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、桥架应尽量在建、建筑物(如墙、柱、梁、楼板等)上安装，与土建工程紧密配合。

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、桥架与制作工艺管道支架共架安装时，桥架应摆放在管道支架的一侧。

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、大跨距电缆桥架与各种各样管道平行面搭建时，其净间隔应达到以下规定：

6. When the long-span cable tray is built parallel to various pipelines, the net spacing shall meet the following provisions:

（1）桥架与一般制作工艺管道(如压缩空气管道等)平行面搭建时不小于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）桥架与有腐蚀性液体管道平行面搭建时不小于500毫米。

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

（3）桥架不适合在输送有腐蚀性液体管道的下方或有腐蚀性气体管道上方平行面安装。当不能防止时,应不小于500毫米。且其间应用防腐隔板隔开。

(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）桥架与供热管道平行面搭建，供热管道有隔热材料时不小于500毫米，无隔热材料时不小于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）桥架不适合在供热管道的上方平行面安装，当不能防止需在供热管道上方平行面安装时，应不小于1000毫米，其间应采取更好的隔热具体措施。

(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、大跨距电缆桥架与各种各样管道交叉时,其净间隔应达到以下规定：

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

（1）桥架与--般制作工艺管道交叉时,不小于300毫米。

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

（2）桥架与有腐蚀性液体管道下方或有腐蚀性气体管道上方交叉时，应不小于500毫米，且在交接处用防腐蚀盖板将桥架维护起来,其盖板长度应不小于d+2000毫米，(d为管道外径)。

(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）桥架与供热管道交叉，供热管道有隔热材料时，应不小于500毫米无隔热材料时，应不小于1000毫米，且在交接处应用隔热材料(比如石棉板)将桥架维护起来，隔热材料长度应不小于d+2000毫米(d为供热管道隔热材料的外径)。

(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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