Consider a 138kv system with 4" bus for each phase (attached example). In which direction do the SC forces on each bus act? I am trying to figure out if any SC forces will make their way to the foundation or if they cancel out at the beam. Talking to one engineer, he mentioned that the SC forces will cancel out at the beam level for being equal and opposite. But I think that the foundation should be designed for a horizontal force from at least one bus.