Transmission Tower is one tall and large structure, which often is a steel tower lattice tower, widely used to support an overhead power line. While in the United Kingdom and some areas of Europe, some provinces of Canada, the electric pylon tower and hydro tower are usually as the hydro-electric tower. These steel towers are used in high voltage AC systems and DC systems, having various kinds of shapes and sizes. Generally, the tower’s classical height is from 15 to 55 meters, equal to 49 to 180 feet, while the tallest tower is the 370 meter tower, one 2700-meter-long span to Zhoushan Island overhead powerline tie.