Watch a Tower Crane Pour HUGE 20 Foot Columns! Tower crane POV tower crane works with the rigger and the concrete placer to pour huge concrete columns. great commentary so you can know what is going on. if you are interested in construction this is a great way to see what is going on. #crane #concretelifting #constructionequipment #concrete #workingrigs #towercranes #construction #cranes #towercranepov