The two types of substation superstructures most in use today are lattice work and ___.

The most commonly used substation superstructures alongside lattice work are solid profile types. Solid profile structures are often chosen due to their robustness and ability to withstand environmental stresses, making them suitable for various operational conditions. They provide a durable framework capable of supporting heavy electrical equipment, thereby ensuring safety and reliability in substation operations.

Solid profile types also often offer benefits such as reduced maintenance needs and enhanced longevity compared to other materials. Their design allows for easy integration with other components of substations, which is crucial for the efficient functioning of electrical networks. This combination of durability, adaptability, and operational efficiency is why solid profile types are favored in modern substation construction.