Install the cable tray when the details of the calculation:

　　(1)荷载计算：计算电缆桥架主干线纵断面上单位长度的电缆重量。

　　(1): load calculation calculation of cable weight per unit length of cable tray on longitudinal section of trunk line.

　　(2)确定桥架的宽度：根据布放电缆条数、电缆直径及电缆的间距来确定电缆桥架的型号、规格，托臂的长度，支柱的长度、间距、桥架的宽度和层数。

　　(2) to determine the width of the bridge cable laying: according to the number and diameter of the cable and cable spacing to determine the type and size of the cable tray, arm length, strut length, spacing, bridge width and number.

　　(3)确定安装方式：根据场所的设置条件确定电缆桥架的固定方式，选择悬吊式、直立式、侧壁式或是混合式，连接件和紧固件一般是配套供应的，此外，根据桥架结构选折相应的盖板。

　　(3) installation: according to determine the place conditions fixed, cable tray suspensory, upright, side wall or mixed type, connectors and fasteners are generally supporting the supply, in addition, according to the bridge structure, choose the corresponding cover.

　　(4)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，以及电缆路由的疏密来确定电缆桥架的佳路由。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。

　　(4) determine the direction: according to the building layout, combined with the air conditioning pipeline pipeline and electrical installation, convenient maintenance, and the density of cable routing to determine the optimum routing of cable bridge. In the room, as far as possible along the walls of the building, columns, beams and floor erection, so the comprehensive utilization of pipe rack erection, should be set up in parallel side or above the pipeline, and consider the lead line and a branch line to avoid cross, such as no other pipe frame borrowing, is required since the establishment (Branch) column.

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