Cable trays are divided into slot type, tray type, ladder type, grid type, and other structures, which are composed of brackets, brackets, and installation accessories. It can be erected independently or attached to various buildings (structures) and pipe rack supports, reflecting the characteristics of simple structure, beautiful appearance, flexible configuration, and convenient maintenance. All parts need to be galvanized and installed on an outdoor bridge outside the building. If it is near the seaside or belongs to a corrosive area, the material must have physical properties such as corrosion resistance, moisture resistance, good adhesion, and high impact strength.

鍍鋅線槽：

Galvanized trunking:

鍍鋅線槽分為：絕緣配線槽、撥開式配線槽、迷你配線槽、分隔式配線槽、室內裝飾配線槽、一體式絕緣配線槽、電話配線槽、日式電話配線槽、明線配線槽、圓形配線管、展覽用隔板配線槽、圓形地板配線槽、軟式圓形地板配線槽、蓋式配線槽等。根據材料的不同，線槽分為PVC線槽、無鹵PPO線槽、無鹵PC/ABS線槽、鋼鋁等金屬線槽等。

Galvanized wiring duct is divided into: insulated wiring duct, split type wiring duct, mini wiring duct, separated type wiring duct, indoor decoration wiring duct, integrated insulated wiring duct, telephone wiring duct, Japanese telephone wiring duct, open wire wiring duct, circular wiring duct, exhibition partition wiring duct, circular floor wiring duct, flexible circular floor wiring duct, cover type wiring duct, etc. According to different materials, trunking is divided into environmentally friendly PVC trunking, halogen-free PPO trunking, halogen-free PC/ABS trunking, steel aluminum and other metal trunking.

電纜橋架與線槽線槽的區別：

The difference between cable tray and trunking:

尺寸規格各不相同：橋架相對較大(200×100-1200×200)，線槽相對較小。如果電纜和電線較多，建議使用橋架。

Different sizes and specifications: the bridge is relatively large (200 × 100-1200 × 200), the trunking is relatively small. If there are many cables and wires, it is recommended to use a bridge.

材料厚度不同：根據JGJ16-2008-5.1金屬線槽又稱槽式橋架，一般由0.4-1.5mm厚的整塊鋼板彎曲而成的槽型部件，概念上與橋架的區別在于高、寬比不同，盤架淺而寬，金屬線槽具有一定的深度和封閉性。但是橋架比線槽更結實，更多的是用來放電纜的，當然也可以放電線，通常用于強電系統。

Different material thicknesses: According to JGJ16-2008-5.1, metal trunking is also known as a trough type cable tray. It is generally a trough type component formed by bending a whole piece of steel plate with a thickness of 0.4-1.5mm. The conceptual difference from the cable tray is that the height to width ratio is different, the tray frame is shallow and wide, and the metal trunking has a certain depth and closure. However, the bridge is more robust than the trunking, and it is more used for placing cables. Of course, it can also be used for placing wires, usually used in strong current systems.

填充率不同:根據JGJ16-20088.5.3，線槽內電線電纜的總截面不得超過線槽內截面的20%，載流導體不得超過30根，而橋梁是電纜的總截面不得超過截面的40%。因為安裝高度不同，所以安裝高度較低必須有蓋板，有蓋板散熱不好，填充率較小。

Different filling rates: According to JGJ16-20088.5.3, the total cross-section of wires and cables in the trunking should not exceed 20% of the cross-section in the trunking, and the current carrying conductors should not exceed 30. The total cross-section of bridges and cables should not exceed 40% of the cross-section. Due to the different installation heights, it is necessary to have a cover plate when the installation height is low. With a cover plate, heat dissipation is not good, and the filling rate is small.

密封性能不同:金屬線槽密封良好，無需支架支撐，可敷設在電纜溝和建筑夾層中。槽橋還有一些是半開放式的，必須有支架作為支撐，一般在室內或室外沿空架設。

Different sealing properties: The metal trunking is well sealed and does not require support. It can be laid in cable trenches and building interlayer. Some slot bridges are semi open and must be supported by brackets, usually erected indoors or outdoors along the air.

不同強度:橋梁主要用于敷設電力電纜和控制電纜，線槽強度低，通常用于敷設電線和通信電線電纜，如網絡電話。

Different intensities: Bridges are mainly used for laying power and control cables, with low trunking strength, and are typically used for laying electric and communication wires and cables, such as network telephones.

轉彎半徑不同:橋梁轉彎半徑比較大，線槽大部分轉彎直角。

Different turning radii: The turning radius of bridges is relatively large, and most of the trunking turns at right angles.

跨度不同:橋梁跨度大，線槽小。所以固定支架差別很大，支吊架數量差別很大。

Different spans: large bridge spans, small trunking. Therefore, the fixed supports vary greatly, and the number of supports and hangers varies greatly.

支吊架間距不同：根據JGJ16-2008，線槽不大于2m，橋架不大于1.5~3m。

The spacing between supports and hangers is different: according to JGJ16-2008, the trunking is not greater than 2m, and the bridge is not greater than 1.5~3m.

安裝方式不同:橋梁有特殊規范(詳見CECS31.91)，線槽無特殊規范固定。

Different installation methods: bridges have special specifications (see CECS31.91 for details), and trunking is not fixed with special specifications.

蓋板問題:《鋼纜橋架工程設計規范》定義為橋架統稱，蓋板為附件。提到橋架安裝高度達不到要求時，應加蓋板保護。也就是說，橋架這個詞的定義不包括蓋板

Cover plate problem: The "Code for Design of Steel Cable Bridge Engineering" defines the bridge as a general term, and the cover plate is an accessory. When it is mentioned that the installation height of the bridge cannot meet the requirements, a cover plate should be added for protection. In other words, the definition of the term bridge does not include the cover plate

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