Key of cable tray construction device

1.電纜橋架及線槽敷設走向應短捷，并應盡量沿墻、沿柱或沿梁敷設。

1. cable bridge and trench laying should be short and quick, and should be laid along the wall, along the column or along the beam.

2.依據電纜橋架及線槽敷設走向，向土建、結構提出預留墻洞、樓板洞及吊架裝置時，所需預埋鋼板方位及荷載。而且應與工藝、水暖及動力相協調。

2. According to the laying direction of cable bridge and cable groove, the orientation and load of embedded steel plate for reserving wall holes, floor holes and suspension frames are put forward to civil engineering and structural specialty. And should be coordinated with craft, plumbing and power.

3.地上內暗裝金屬線槽布線，在設計時應與土建密切配合，以便依據不同的結構型式和修建布局，合理確定線路途徑和設備選型。

3. Metal groove wiring on the ground should be closely coordinated with civil engineering specialty in order to rationally determine the route and equipment selection according to different structural types and construction layout.

4.不同電壓、不同用途的電纜不宜敷設在同一層電纜橋架內：

4. cables with different voltages and uses are not suitable for laying in the same cable bridge.

5.1kV以上和1kV及以下的電纜；

Cables above 5.1kV and 1kV and below;

6.同一途徑向一級負荷供電的雙回路電纜；

6. double circuit cable supplied to the first level load in the same way;

7.應急照明和其他照明的電纜；

7. emergency lighting and other lighting cables.

8.電力、操控和電信電纜。若不同等級的電纜敷設在同一電纜橋架時，中心應添加隔板阻隔。

8. power, control and telecommunication cables. If different grades of cables are laid on the same cable tray, the center should be partitions.

9.在工程條件下裝置或檢修不需考慮附加集中荷載時，電纜梯架、托盤的作業均布荷載按電纜自重均勻分布核算。

9. When the additional concentrated load is not needed in the installation or maintenance under the engineering condition, the uniform distribution load of cable ladder and tray is calculated according to the uniform distribution of cable deadweight.

10.電纜橋架不宜與下列管道平行敷設，當無法防止時，電纜橋架的方位應契合下列規定，或采取相應防護辦法。

10. The cable bridge should not be laid in parallel with the following pipes. If it is impossible to prevent, the orientation of the cable bridge should comply with the following provisions or take appropriate protective measures.

11.電纜橋架應在具有腐蝕性液體管道上方。

11. the cable tray should be above the corrosive liquid pipe.

12.電纜橋架應在熱力管道下方。

12. the cable tray should be under the thermal pipe.

13.易燃易爆氣體比空氣重時，電纜橋架應在管道上方。

13. when the inflammable and explosive gas is heavier than air, the cable tray should be above the pipe.

14.易燃易爆氣體比空氣輕時，電纜橋架應在管道下方。

14. when the flammable and explosive gas is lighter than air, the cable tray should be under the pipe.

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