What is a key consideration when selecting transmission structures?

When selecting transmission structures, it is crucial to consider whether two circuits are required because this impacts the design and configuration of the transmission infrastructure. Having two circuits might necessitate a different structural design to support the additional load and ensure redundancy for reliability in power supply. This consideration is essential for maintaining efficient operations and minimizing disruptions in electricity transmission.

The need for dual circuits also influences other factors, such as spacing between lines, the overall footprint of the structures, and clearance requirements, which must account for safety, maintenance access, and environmental impacts. Other aspects like height, color, and proximity to urban areas might be important for aesthetic, safety, or regulatory reasons, but they do not directly affect the fundamental requirements for the design and capability of the transmission structures in the same way that circuit requirements do.