Jinan cable bridge as a supporting project of wiring engineering, there is no special standard guidance, a manufacturer's standard program is lack of universality, therefore, the design and selection process should be based on the type and quantity of each weak current system cable, reasonable selection of suitable bridge.
Determine the direction: determine the route of cable bridge according to the construction layout plan, the setting condition of air conditioning pipeline and electrical pipeline, the convenience of repair, and the density of cable route. Indoors, it should be erected along the wall, column, beam and floor of the building as far as possible. When the pipe gallery is used, it should be erected parallel on one side or above the pipe, and the down lead and branch line should be considered to avoid interpenetration as far as possible. If there is no other pipe rack to borrow, it is necessary to establish (support) column by itself.
Load Accounting: calculate the cable component per unit length on the vertical section of the main line of cable bridge. Determine the width of the cable tray: determine the type and standard of the cable tray, the length of the bracket, the length and distance of the pillar, the width and number of layers of the cable tray according to the number of cables, the diameter of the cable and the distance of the cable.
Installation method: determine the fixing method of the cable tray according to the setting conditions of the site, and select the suspension type, vertical type, side wall type or mixed type. The connectors and fasteners are generally supplied together. In addition, according to the bridge structure, select and fold the corresponding cover plate, draw the plane and section drawings of the cable tray, and draw the space diagram for some parts, and list the material list. If it is used together with power cable bridge, the power cable and weak current cable should be separated on each straight side, and the center should be separated by partition.