1、弱电桥架作为布线工程的一个配套项目，目前尚无专门的规范指导，个生产厂家的规格程式缺乏通用性，因此，设计选型过程应根据弱电各个系统缆显得类型、数量，合理选定适用的桥架。

1. As a supporting project of wiring engineering, there is currently no specialized specification guidance for weak current cable trays, and the specifications and programs of individual manufacturers lack universality. Therefore, the design and selection process should be based on the type and quantity of cables in each weak current system, and the appropriate cable tray should be selected reasonably.

（1)确定方向：根据建筑平面布置图；结合空调管线和电气管线等设置情况、方便维修；以及弱电路由的疏密来确定弱电桥架的非常佳路由。在室内；尽可能沿建筑物的墙、柱、梁及楼板架设；如许利用综合管廊架设时；则应在管道一侧或上方平行架设；并考虑引下线和分支线尽量避免交叉；如无其它管架借用；则需自设立（支)柱。

(1) Determine direction: according to the building layout plan; Combining the installation of air conditioning and electrical pipelines to facilitate maintenance; And the density of weak current routing is used to determine the optimal routing for weak current cable trays. Indoors; Erect along the walls, columns, beams, and floor slabs of the building as much as possible; When using a comprehensive pipe gallery for installation; It should be installed in parallel on one side or above the pipeline; And consider avoiding intersections between down conductors and branch lines as much as possible; If there are no other pipe racks to borrow; It is necessary to establish (support) columns on its own.

（2)荷载计算：计算弱电桥架主干线纵断面上单位长度的弱电重量。

(2) Load calculation: Calculate the weight of weak current per unit length on the longitudinal section of the main line of the weak current bridge.

（3）确定桥架的宽度：根据布放弱电条数、弱电直径及弱电的间距来确定弱电桥架的型号、规格；托臂的长度；支柱的长

(3) Determine the width of the cable tray: Determine the model and specifications of the weak current cable tray based on the number of weak current strips, weak current diameter, and weak current spacing; The length of the supporting arm; The length of the pillar

度、间距；桥架的宽度和层数。

Degree and spacing; The width and number of layers of the bridge.

（4)确定安装方式：根据场所的设置条件确定桥架的固定方式；选择悬吊式、直立式、侧壁式或是混合式；连接件和紧固

(4) Determine installation method: Determine the fixing method of the bridge according to the setting conditions of the site; Choose suspended, upright, side wall, or hybrid; Connectors and fasteners

件一般是配套供应的；此外；根据桥架结构选折相应的盖板。

The items are usually supplied as a matching set; In addition; Select and fold the corresponding cover plate according to the bridge structure.

（5）绘出弱电桥架平、剖面图；局部部位还应绘出空间图；开列材料表。

(5) Draw a plan and sectional view of the weak bridge frame; Local areas should also be depicted with spatial maps; List the materials.

2、如与电力弱电桥架合用时；应将电力弱电和弱电弱电各直一侧；中间采用隔板分隔。

2. When used in conjunction with weak electrical cable trays; The weak electricity and weak electricity should be placed on one side each; The middle is separated by a partition.

3、弱电弱电与其它低电压弱电合用桥架时；应严格执行选择具有外屏蔽层的弱电系统的弱电弱电；避免相互间的干扰。

3. When weak current and other low-voltage weak current are used in the same cable tray; The selection of weak current systems with external shielding layers should be strictly enforced; Avoid mutual interference.

4、弱电桥架安装要求

4. Installation requirements for weak current cable tray

（1)槽式大跨距弱电桥架由室外进入建筑物内时；桥架向外的坡度不得小于1/100。

(1) When the trough type large-span weak current bridge enters the building from outdoors; The slope of the bridge towards the outside shall not be less than 1/100.

（2)弱电桥架与用电设备交越时；其间的净距不小于$2。

(2) When the weak current bridge intersects with electrical equipment; The net distance between them is not less than $2.

（3）两组弱电桥架在同一高度平行敷设时；其间净距不小于$2。（4)在平行图上绘出桥架的路由；要注明桥架起点、终点、

(3) When two sets of weak current cable trays are laid in parallel at the same height; The net distance between them shall not be less than $2. (4) Draw the routing of the bridge on a parallel diagram; Please indicate the starting and ending points of the bridge frame

拐弯点、分支点及升降点的坐标或定位尺寸、标高；如能绘制桥架敷设轴侧图；则对材料统计将更准确。

Coordinates or positioning dimensions and elevations of turning points, branching points, and lifting points; If it is possible to draw a side view of the cable tray laying axis; The material statistics will be more accurate.

直线段：注明全长、桥架层数、标高、型号及规格。拐弯点和分支点：注明所用转弯接板的型号及规格。升降段：注明标

Straight line segment: indicate the total length, number of bridge layers, elevation, model, and specifications. Turning and branching points: indicate the model and specifications of the turning joint used. Lifting section: indicate the mark

高变化；也可用局部大样图或剖面图表示。

High variability; It can also be represented by local detailed drawings or sectional views.