(1）电缆桥架是梯级式、托盘式、槽式电缆桥架的总称，按制造材料分为金属桥架和高分子合金电缆桥架、普通塑料桥架。

(1) Cable tray is a general term for stepped, tray, and trough cable trays, which can be divided into metal tray, polymer alloy cable tray, and ordinary plastic tray according to manufacturing materials.

(2）按结构形式分为梯级式电缆桥架（简称:梯架）、托盘式电缆桥架（简称:托盘)、槽式电缆桥架(简称:槽盒)。

(2) According to the structural form, it is divided into ladder type cable tray (referred to as ladder), tray type cable tray (referred to as tray), and trough type cable tray (referred to as trough box).

(3）梯架、托盘和槽盒各有优缺点;梯架具有良好的通风性能，但不防尘、不防干扰。托盘、槽式具有防尘、防干扰性能，但散热性能较差。

(3) Ladders, trays, and trough boxes each have their own advantages and disadvantages; The ladder has good ventilation performance, but it is not dust-proof or interfered with. The tray and slot type have dust-proof and anti-interference performance, but their heat dissipation performance is poor.

(4)电缆桥架在民用建筑中主要用于明敷布线。

(4) Cable trays are mainly used for exposed wiring in civil buildings.

梯级式电缆桥架它具有重量轻、成本低、安装方便、散热、透气好等优点，适用于直径较大电缆的敷设。在工业与民用建筑中、通常用于明敷布线系统。

The stepped cable tray has the advantages of light weight, low cost, easy installation, good heat dissipation and ventilation, and is suitable for laying cables with larger diameters. In industrial and civil buildings, it is commonly used for exposed wiring systems.

梯架选用原则如下:

The principles for selecting ladders are as follows:

(1）普通电力电缆、通信电缆布线可采用梯架布线，但不可在的闷顶或吊顶内敷设;

(1) Ordinary power cables and communication cables can be wired using ladder racks, but cannot be laid in enclosed or suspended ceilings;

(2）除950℃、3h的矿物绝缘电缆外，750℃、1.5h的耐火电缆不可采用梯架布线;

(2) Except for mineral insulated cables at 950 ℃ and 3 hours, fire-resistant cables at 750 ℃ and 1.5 hours cannot be wired using ladder racks;

(3）在强弱电竖井内应优先考虑采用锑袈识课堂

(3) Priority should be given to using antimony recognition classrooms in strong and weak electrical vertical shafts

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