Abstract: An electric transmission line support structure. A crossarm depending perpendicularly from a vertical shaft has a first and a second mounting point. A central support depends from the crossarm between the first and the second mounting point. A first conductor bundle is attached to the first mounting point by a first structural string and to the central support by a second structural string. A second conductor bundle is connected to the central support by a third structural string and to the second mounting point by a fourth structural string. A fifth structural string, perpendicular to the crossarm and extending between the first conductor bundle and the second conductor bundle, connects the central mounting point to a third conductor bundle that is further from the crossarm than the first conductor bundle and the second conductor bundle. A sixth structural string connects the vertical shaft to the third conductor bundle.