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

（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 pipe, 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 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）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) 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).

橋架穿墻安裝時，應依據自然環境條件，選用密封性設備：

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

（1）橋架從正常情況下自然環境穿墻進到防火、防爆型的自然環境時，墻上應安裝對應的密封性設備。

(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）橋架從房間內穿墻戶外時，在墻的外側應采用防水防雨具體措施。

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

（3）橋架從房間內穿墻戶外較高空安裝時，橋架先要向下傾斜增加適量間隔，隨后再向上搭建，防止雨水順橋架流入房間內。

(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）橋架過伸縮沉降縫時，電纜線橋應斷開連接，斷開連接間隔以100毫米上下為宜。

(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.

兩組電纜線橋在同一個橫梁上安裝時，兩兩之間的凈間隔應不小于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.

鋪設10kV及之上電纜線的橋架多層安裝時，其層間隔一般不小于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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