When the bridge crosses various pipelines, the net spacing shall meet the following requirements:

（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 pipe, 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 500 mm, and the bridge shall be maintained with an anti-corrosion cover plate at the junction. The length of the cover plate shall not be less than d+2000 mm, (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) The bridge crosses the heat supply pipeline. When the heat supply pipeline has heat insulation materials, it should not be less than 500mm. When there is no heat insulation materials, it should not be less than 1000mm. And at the junction, heat insulation materials (such as asbestos board) should be used to maintain the bridge. The length of the heat insulation materials should not be less than d+2000 mm (D is the outer diameter of the heat insulation materials of the heat supply pipeline).

桥架穿墙安装时，应依据自然环境条件，选用密封性设备：

When the bridge is installed through the wall, the sealing equipment shall be selected according to the natural environmental conditions:

（1）桥架从正常情况下自然环境穿墙进到防火、防爆型的自然环境时，墙上应安装对应的密封性设备。

(1) When the bridge passes through the wall from the natural environment under normal circumstances to the fire-proof, safe and explosion-proof natural environment, the corresponding sealing equipment shall be installed on the wall.

（2）桥架从房间内穿墙户外时，在墙的外侧应采用防水防雨具体措施。

(2) When the bridge passes through the wall from the room to the outdoors, specific waterproof measures shall be taken outside the wall.

（3）桥架从房间内穿墙户外较高空安装时，桥架先要向下倾斜增加适量间隔，随后再向上搭建，防止雨水顺桥架流入房间内。

(3) When the bridge is installed from the wall in the room to a higher height outdoors, the bridge should first be tilted downward to increase an appropriate interval, and then built upward to prevent rainwater from flowing into the room along the bridge.

（4）桥架过伸缩沉降缝时，电缆线桥应断开连接，断开连接间隔以100毫米上下为宜。

(4) When the cable tray passes through the expansion settlement joint, the cable bridge should be disconnected, and the disconnection interval should be 100 mm up and down.

两组电缆线桥在同一个横梁上安装时，两两之间的净间隔应不小于50毫米。

When two sets of cable bridges are installed on the same beam, the net spacing between the two should not be less than 50mm.

铺设10kV及之上电缆线的桥架多层安装时，其层间隔一般不小于300毫米。

When the cable tray laying 10kV and above is installed in multiple layers, the layer spacing is generally not less than 300mm.

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