1、电缆桥架直线段之间、直线段与弯变直线段之间使用的连接件应为电缆桥架厂生产的配套连接件。连接件钢板厚度不得小于电缆桥架钢板厚度。接口应平整，无扭曲、凸出、凹陷。连接用的半圆头镀锌螺栓应位于电缆桥架内侧。螺栓长度适当，拧紧后长度为2-5齿。

1. The connectors used between straight sections of cable trays and between straight sections and curved straight sections should be matching connectors produced by cable tray factories. The thickness of the connecting steel plate shall not be less than the thickness of the cable tray steel plate. The interface should be flat, without distortion, protrusion, or depression. The half round head galvanized bolts used for connection should be located on the inside of the cable tray. The bolt length is appropriate, with a length of 2-5 teeth after tightening.

2、水平安装的电缆桥架和直线段的连接头应尽量放在两个支吊架之间距离的四分之一左右。

2. The connection head between horizontally installed cable trays and straight sections should be placed as close as possible to about one-quarter of the distance between the two supports and hangers.

3、一般来说，施工现场不能制作电缆桥架。但因特殊原因需要时，可将现有直线梁桥改造为非标准弯孔型和直孔型。直线段电缆桥架改造切割时，不得采用气焊、电焊切割，应使用专用切割工具。改造后的电缆桥架必须光滑，及时上漆，使面漆的颜色与其他电缆桥架相近。

3. Generally speaking, cable trays cannot be made on construction sites. However, due to special reasons, existing straight beam bridges can be transformed into non-standard curved and straight hole types. When renovating and cutting straight cable trays, gas welding and electric welding cutting shall not be used, and specialized cutting tools shall be used. The renovated cable tray must be smooth and painted in a timely manner to make the color of the topcoat similar to other cable trays.

4、当电缆桥架要跨越建筑物的伸缩缝时，根据GB50168的规定，应设置伸缩缝，以保证电缆桥架和铺设在电缆桥架内部的电缆，在建筑物伸缩不危及自身的情况下，能自由伸缩，不受损坏。原因是在新建建筑中，电缆桥架通常是在混凝土结构完工后几个月甚一年后安装的，这时混凝土的收缩率逐渐减小。伸缩量一般不会超过建筑物伸缩缝的宽度L。如果发现或向土建单位了解到，建筑伸缩缝比较大，可能超过L，应根据实际情况做伸缩处理。

4. When the cable tray needs to cross the expansion joint of the building, according to the provisions of GB50168, expansion joints should be set up to ensure that the cable tray and the cables laid inside the cable tray can freely expand and contract without endangering the safety of the building and without damage. The reason is that in newly constructed buildings, cable trays are usually installed several months or even a year after the completion of the concrete structure, during which the shrinkage rate of the concrete gradually decreases. The expansion amount generally does not exceed the width L of the building expansion joint. If it is found or learned from the civil engineering unit that the building expansion joint is relatively large and may exceed L, expansion treatment should be carried out according to the actual situation.