An anchor portal1 or H-frame tower is a gantry structure supporting overhead power lines in a switchyard. Their static function is similar to a dead-end tower. Anchor portals are almost always steel-tube or steel-framework constructions.
Gallery
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A simple H-frame anchor tower consisting of two poles and one horizontal crossarm, bearing similarity to the letter H -
anchor pylon and anchor portal, 380kV -
anchor gantry, 110kV -
diagonal frame -
Multi-level gantry tower -
Gantry tower with road underneath
References
References
- kalhor, mostapha. "power electrical Engineering - Anchor portal". powertower.page.tl. Retrieved 12 June 2025.