1, the width and height of the bridge should be selected according to table (2), and should comply with the cable filling rate shall not exceed the relevant standards and specifications of the value, power cables may be 40 - 50%, control cables may be 50 - 70%. In addition, 10 - 25% of the project development allowance should be reserved.
2, all kinds of bending and accessories specifications should comply with the layout of the project conditions, and supporting the bridge.
3, the selection of cross section area of the bridge is shown in table.