First of all, let's talk about the purpose and purpose. They are both the same, and the ultimate purpose of cable supports and cable trays is to lay cables.

電纜敷設在電纜溝和隧道內，一般多使用支架固定。常用的支架有角鋼支架和裝配式支架。

Cables are laid in cable trenches and tunnels, usually fixed with brackets. Commonly used brackets include angle steel brackets and prefabricated brackets.

電纜橋架分為槽式、托盤式和梯架式、網格式等結構，由支架、托臂和安裝附件等組成。建筑物內橋架可以獨立架設，也可以敷設在各種建(構)筑物和管廊支架上

Cable trays are divided into slot type, tray type, ladder type, and grid type structures, consisting of brackets, brackets, and installation accessories. The bridge in the building can be erected independently or laid on various buildings (structures) and pipe rack supports

不過使用環境用途不一樣，電纜支架通常用在地下管廊電纜溝和隧道中，這類項目跨距建議一般是0.8m、1m左右，當電纜跨越距離較大時，就得用到電纜橋架了，一般普通住宅、公建、工業廠房、鋼結構建筑項目都是用電纜橋架，電纜橋架常規長度為2米一條，大跨距電纜橋架更是可以達到3米6米以上。

However, the usage environment is different. Cable supports are usually used in underground pipe galleries, cable trenches, and tunnels. The recommended span for such projects is generally around 0.8m or 1m. When the cable span distance is large, cable trays are needed. Generally, cable trays are used in ordinary residential, public, industrial, and steel structure construction projects. The usual length of cable trays is 2 meters, and large span cable trays can reach more than 3-6 meters.

橋架的跨距長度大了，自然橋架的載荷能力比電纜支架更高。

The span length of the bridge has increased, and the load capacity of the natural bridge is higher than that of the cable support.

至于材質方面，電纜支架還是電纜橋架它們2個都是可以用鋼制、玻璃鋼或者復合材料制作的，用于滿足不同防腐需求的場所使用。

As for the materials, both cable supports and cable trays can be made of steel, fiberglass, or composite materials to meet different anti-corrosion needs.