According to the filling rate of strong and weak electricity selection, the selection of the width and height of the cable bridge should conform to the requirement of filling rate. The filling rate of the cable ladder is in general condition, the power cable is 40%-50%, the control cable is 50%-70%, and the development margin of the 10%-25% project should be reserved.
Cable bridge is made up of pultrusion FRP profiles. It is suitable for power cable, control cable, lighting cable and accessories. Compared with iron bridge, it has long service life, convenient installation, low cost, convenient cutting and no maintenance. It is widely used in the laying of cable bridge.
The load grade is greater than the budget grade. When choosing the load grade of the ladder type cable bridge, the uniform load of the bridge should not be larger than the rated uniform load of the load grade of the selected bridge. If the actual span of the bridge hanger is not equal to 2m, the uniform load should be full.
A large span bridge should be verified that the strength, stiffness and stability of a steel bridge with a span of greater than 6m and an aluminum alloy bridge with a span greater than 2m or a load-carrying requirement of D higher than the load level should be calculated or tested.
The ladder type cable bridge, line groove and its supporting hangers are used in corrosive environment to make use of corrosion-resistant rigid materials, or to take anticorrosion treatment that meets the requirements of engineering environment and durability.
Components must be matched, and the specifications and sizes of various components and support frames should be matched with the line and bend series of the tray, the ladder frame and the staircase.
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