Cable bridge is a rigid structural system closely connected to support cables, which is composed of trough type, tray type or step type straight section, elbow, tee, cross components, arm (arm type support), hanger, etc. There are many types of bridge products on the trading treasure, and the products are of high quality, which are widely concerned by users. Many products are made of high-quality cold-rolled steel plate, and the surface technology includes cold galvanizing, hot galvanizing, electrostatic spraying, fire-retardant coating, baking paint, etc.

電纜橋架的外觀有很多種，比如鍍鋅、噴塑、鍍鋅+噴塑。但線槽好像就是鍍鋅。橋架還分很多種，例如：梯形橋架、金屬線槽，還有玻璃鋼橋架等等。電纜橋架和金屬線槽的區(qū)別具體如下：

There are many kinds of appearance of cable tray, such as zinc plating, plastic spraying, zinc plating + plastic spraying. But the trunking seems to be galvanized. There are many kinds of cable tray, such as trapezoidal cable tray, metal trunking, FRP cable tray and so on. The differences between cable tray and metal trunking are as follows:

1.電纜橋架一般寬度>200mm，金屬線槽寬度<200mm。

1. The general width of cable tray is more than 200 mm, and the width of metal trunking is less than 200 mm.

2.電纜橋架主要用于敷設(shè)電纜，金屬線槽主要用于敷設(shè)導(dǎo)線。

2. Cable tray is mainly used for laying cables, and metal trunking is mainly used for laying wires.

3.電纜橋架型式有梯式、槽式、托盤式、組合式等多種，而在材質(zhì)和防腐處理方面又分鋁合金、玻璃鋼、冷（熱）軋鋼板鍍鋅、噴涂等。金屬線槽就一種，一般用熱軋鋼板作成。

3. There are many types of cable tray, such as ladder type, trough type, tray type, combined type and so on. In terms of material and anti-corrosion treatment, it is divided into aluminum alloy, glass fiber reinforced plastic, cold (hot) rolled steel plate galvanizing, spraying and so on. Metal raceway is one kind, generally made of hot rolled steel plate.

4.電纜橋架敷設(shè)時(shí)一般應(yīng)考慮其荷載、撓度、填充率。

4. The load, deflection and filling rate of cable tray should be considered when laying.

5.金屬線槽約等于槽式電纜橋架，只不過(guò)某些金屬線槽尺寸較小罷了（地面線槽除外）。有些從橋架下來(lái)需接到配電柜的線都是走到金屬線槽里再接入配電柜.

5. Metal trunking is about the same as cable tray, but some metal trunking is smaller (except ground trunking). Some wires from the bridge to the power distribution cabinet are connected to the metal trunking

6.橋架有好多種、是開(kāi)放式的，線槽多數(shù)是封閉的（塑料&金屬）7.兩種敷設(shè)方式載流量不同

6. There are many kinds of bridge, which are open, and most of the trunking are closed (plastic & metal). 7. The current carrying capacity of the two laying methods is different

8.橋架一般裁質(zhì)是冷軋鋼板，而線槽用的是鍍鋅鐵皮。

8. The bridge is generally made of cold-rolled steel plate, while the trunking is made of galvanized iron sheet.

9.從外觀跟材質(zhì)上分：我的觀點(diǎn)是橋架比金屬線槽厚，安裝相對(duì)牢固。

9. From the appearance and material: my point of view is that the bridge is thicker than the metal trunking, and the installation is relatively firm.

10.既然規(guī)范有對(duì)橋架、金屬線槽的分別說(shuō)明，它們?cè)诓馁|(zhì)方面就有區(qū)別。《民用建筑電氣設(shè)計(jì)規(guī)范》上有對(duì)應(yīng)條款的要求。

10. Since the specification has a separate description of bridge and metal trunking, they are different in material. There are corresponding requirements in code for electrical design of civil buildings.