Tripile foundation structures consist of a tripod construction which tapers in the upper apex and joins together to form a supporting cross. The steel pipe sections of the wind turbine are placed and connected in this area. In the lower area, three foundation piles are driven into the seabed, on which the tripile construction is placed. This process is also called pre-pilling, as the piles are set first. The arrangement of the piles corresponds to that of an equilateral triangle. This pile foundation is carried out to a depth of 30m, depending on the nature of the seabed.