Bridge in the project of the installation of a wide range of USES, but every high - level circuit installation, will use the bridge. The bridge can not only support the cable but also help regulate the direction of the cable. Bridge in the process of installation, need to assembly connection bridge, but not bridge the linkage between the welding process can be used, because welding belongs to the rigid connection for the change of external temperature has great influence to welding structure, welding and after welding will may exist rust corrosion phenomenon, impact on bridge performance. Connections between Bridges shall be bolted. In addition to avoiding welding when installing cable tray, what other considerations should be taken?
First, the site is the primary consideration for cable tray assembly. Because the main beam will have a certain temperature difference, so that arch degree, warping degree, horizontal bending changes. Therefore, it is better to assemble the bridge in the factory, so that the temperature difference will not cause too much. Bridge inspection is best done in the morning or evening.
Second, the location of the pad also affects the assembly of the bridge. Because the arch of the main beam is affected by the self-weight factor, it is best to install the pad bracket at or near the cross-end of the main beam. And the smaller weight of the bridge had better be installed in the end beam.
Third, in order for the cable tray to work normally after the wheel is installed, four groups of bent plates should be placed in the same plane during assembly. The horizontal plane is used as a reference to adjust all parts of the bridge.