It seems to be some kind of production facility with machines standing in there. So maybe the Idea is to have electrical boxes on every pillar, so you'll have electricity available wherever you place the machines. If the production lines are changed regularly, you wouldn't want to rewire the entire building each time. A bit like these cubes hanging from the ceiling so you don't need to run extension cords through your workshop whenever you need power somewhere, but a bit more encapsulated.