Overhead laying can exist between buildings, between buildings and power poles, and between power poles. The actual operation depends on the situation at the time. When there are power poles between buildings, steel wire ropes can be erected between the buildings and the poles, and the optical cables can be tied to the steel wire ropes; If there are no power poles between buildings, but the distance between two buildings is about 50m, optical cables can also be directly installed between buildings through steel cables. The laying requirements are as follows:
1. When laying optical cables in a flat environment using overhead methods, use hooks to hang them; When laying optical cables in mountainous or steep slopes, use binding methods to lay the cables. The optical cable connector should be located on a straight pole that is easy to maintain, and the reserved optical cable should be fixed on the pole with a reserved bracket.
2. The optical cable of the overhead pole road requires U-shaped expansion bends every 3-5 gear rods, with approximately 15m reserved every 1km.
3. The overhead (wall) optical cable should be protected with galvanized steel pipes, and the pipe mouth should be blocked with fireproof mud.
4. Aerial optical cables should be hung with warning signs for optical cables every four gear poles and special areas such as crossing roads, rivers, and bridges.
5. At the intersection of the overhead line and the power line, a three pronged protective tube should be added for protection, and the elongation at each end should not be less than 1m.