The bridge is a support for supporting and placing cables. Bridge is widely used in engineering. As long as cables are laid, bridge should be used. As a supporting project of wiring engineering, there is no special specification guidance at present. The specification program of each manufacturer is lack of universality. Therefore, the design and selection process should reasonably select the applicable bridge according to the type and quantity of cables in each weak current system. Cable tray has the characteristics of complete variety, wide application, high strength, light structure, low cost, simple construction, flexible wiring, standard installation, beautiful appearance and so on.

二、分類及用途

2、 Classification and use

橋架通常分為槽式橋架，梯級式橋架，托盤式橋架，大跨距電纜橋架。梯式橋架適用于一般直徑較大電纜的敷設，適合于高、低壓內鏈動力電纜的敷設。

The cable tray is usually divided into trough type cable tray, ladder type cable tray, tray type cable tray and long-span cable tray. Ladder type cable tray is applicable to the laying of general cables with larger diameter and high and low voltage inner chain power cables.

槽式橋架是一種全封閉型電纜橋架，適用于敷設計算機電纜、通信電纜、熱電偶電纜及其它高靈敏系統的控制電纜等。

Trough type cable tray is a fully enclosed cable tray, which is suitable for laying computer cables, communication cables, thermocouple cables and control cables of other highly sensitive systems.

CQ1-T型梯級式電纜橋架具有重量輕、成本低、造型別具、安裝方便、散熱、透氣好等優點。他適用于一般直徑較大電纜的敷設，適合高、低壓內鏈動力電纜的敷設。

Cq1-t stepped cable tray has the advantages of light weight, low cost, unique shape, convenient installation, good heat dissipation, good ventilation and so on. It is applicable to the laying of general cables with larger diameter and high and low voltage inner chain power cables.

托盤式橋架是石油、化工、輕工、電訊等方面應用廣泛的一種，即適用于動力電纜的安裝，也適合于控制電纜的敷設。

Tray type bridge is widely used in petroleum, chemical industry, light industry, telecommunications and other fields, which is suitable for the installation of power cables and the laying of control cables.

大跨距電纜橋架可分為梯級式、托盤式、 槽式。 梯級式匯線橋架具有良好的通風性能，不防塵、不妨干擾。托盤式電纜橋架其表面處理可根據用戶需要分為鍍鋅、靜電噴塑和熱鍍鋅三種，在重腐蝕環境中可作特殊防腐處理 。適用于電力電纜、控制電纜、照明電纜及配件等。

Long span cable tray can be divided into ladder type, tray type and trough type. The cascade junction bridge has good ventilation performance and is not dustproof and may not be interfered with. The surface treatment of tray type cable tray can be divided into galvanizing, electrostatic plastic spraying and hot galvanizing according to the needs of users. It can be used for special anti-corrosion treatment in heavy corrosive environment. It is suitable for power cables, control cables, lighting cables and accessories.

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