Power transmission line steel tower is called power steel tower for short. Based on its shapes, it is generally divided into 5 types: goblet type, cathead type, -shaped type, -shaped type and barrel type. Based on application, it can be divided into: strain tower, straight line tower, angle tower, transposition tower (tower for transposition of wire phase position), terminal tower and crossing tower, etc. Their structural features are: all kinds of towers are of space truss structures; bars are mainly composed of single equal angle steel or assembling angle steel; materials are generally Q235(A3F) and Q345(16Mn); bars are connected by black bolts with shearing force; entire tower is composed of angle steels, link plates and bolts; a few components like tower base are assemblies of welded steel plates for convenience of hot galvanizing anti-corrosion, transportation and erection. For steel towers that with calling height below 60m, shackles are mounted on one of main columns for construction people to climb to work. Our company is a large scale enterprise specializing in manufacturing of 220KV (330KV) electric power steel tower with advanced manufacturing facility and international top-ranking assembly line and our products are favored by a large quantity of clients.