Which structure is a common choice for high voltage transmission lines?

The choice of lattice type towers for high voltage transmission lines is primarily due to their structural integrity and capacity to support heavy loads over long spans. Lattice towers are designed to withstand significant environmental forces, such as wind and ice, making them ideal for the demanding conditions often encountered in high voltage applications. Their design not only supports the weight of the conductors but also provides adequate clearance from the ground and surrounding structures, ensuring safety and reliability.

Additionally, lattice towers are typically constructed from steel, which offers high tensile strength and durability, essential for supporting high voltage conductors. Their open structure allows for efficient cooling of the lines and reduces wind resistance, which can be a significant factor in maintaining the stability and performance of transmission lines.

While wood poles can be used in lower voltage applications, they face limitations in strength and longevity, particularly in challenging weather conditions. Pole-mounted insulators are components used in various types of structures but are not sufficient alone to support high voltage lines. Fiberglass structures may offer benefits in some applications, but they are generally less common for high voltage transmission compared to the tried-and-true designs of lattice towers.