Lattice towers are used for power lines of all voltages, and are the most common type for high-voltage transmission lines. Lattice towers are usually made of galvanized steel.OverviewA transmission tower (also electricity pylon, hydro tower, or pylon) is a tall, usually a or tubular made of, that is used to support an. In, transmission towers carry. Transmission tower is the name for the structure used in the industry in the United States and some other English-speaking countries. In Europe and the U.K., the terms electricity pylon and pylon derive from the ba.