Lattice towers tend to remain the choice for lines energized at:

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Multiple Choice

Lattice towers tend to remain the choice for lines energized at:

Lattice towers are chosen for high-voltage transmission because they provide the strength and stability needed to carry heavy conductors over long spans. Their interlaced steel framework distributes wind and ice loads well and allows for tall structures, which keeps the insulation distances safe. For voltages around 230 kV and higher, lines require larger insulators, heavier conductors, and often the option of carrying multiple circuits on the same structure. A lattice design handles these demands efficiently while preserving reliability and clearance. In contrast, lower-voltage lines (such as 115 kV and below or 69 kV) usually don’t need such heavy support, so simpler structures like poles or shorter towers are more economical.

Lattice towers are chosen for high-voltage transmission because they provide the strength and stability needed to carry heavy conductors over long spans. Their interlaced steel framework distributes wind and ice loads well and allows for tall structures, which keeps the insulation distances safe. For voltages around 230 kV and higher, lines require larger insulators, heavier conductors, and often the option of carrying multiple circuits on the same structure. A lattice design handles these demands efficiently while preserving reliability and clearance. In contrast, lower-voltage lines (such as 115 kV and below or 69 kV) usually don’t need such heavy support, so simpler structures like poles or shorter towers are more economical.

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