Communication tower features
Base station towers are divided into ground towers and roof towers due to different locations. Ground towers usually use angle steel towers, steel pipe towers (four or three pillars), steel single pipe towers, and cable towers (masts). Angle steel tower is the most common type, it is easy to manufacture and install, and it is economical and applicable. It should be the first choice for iron tower construction. Steel pipe four-post (or three-post) towers can be made very small (around 2m) due to their rooting, which is suitable for narrow sites or close to buildings, but the cost is higher than angle steel towers. Single tube towers are mostly used in urban scenic areas or other places that require beautiful appearance, because it is inconvenient to lower the feeder cable and climb personnel. In addition, the cost is high, and it is only used in special requirements. The advantage of the cable tower is that the amount of steel used is small, but the area is large, and whether it is economical should be considered comprehensively.
In addition, the cable communication tower is easily damaged by external forces. Once the cable is damaged, it will cause the tower to fall down. The cable tower will also be oscillated and twisted horizontally due to the wind. Use the microwave transmission base station with caution. Roof towers generally use angle steel towers or elevated frames (that is, grid frames). There are two cases for tower installation. One is that the load of the iron tower has been considered in the design of the building and embedded parts (such as the roof of the telecommunications room) have been set. It is to build an iron tower on an old building. In the second case, check and calculate the original building, transform the structure, and add anchoring measures for the tower.
The roots of communication towers often vary, and the height of the towers is also restricted. The roof waterproof layer damaged due to construction must be carefully repaired. Care should be taken in the design. When the antenna height is not much higher than the building roof (about 10m), a simple roof iron frame method can be adopted, and a concrete pier is placed as a counterweight at the beam (wall) of the building (the calculated concrete weight is sufficient to resist the overturning force of the iron frame) The iron frame is fixed to the concrete pier, and it is not necessary to destroy the roof waterproof layer. This method has low cost and simple construction. It is also possible to use a cable to fix the roof iron frame instead of a concrete pier counterweight, but the anchor points of the cable must be handled with care.
