A tall vertical vessel 1.5 m in diameter and 13 m high is to be provided with skirt support. The weight of the vessel with all its attachments is 80,000 kg. The diameter of the skirt is equal to the diameter of the vessel. The height of the skirt is 2.2 m. The wind pressure acting over the vessel is 100 kg/m². The seismic coefficient is 0.08. The permissible tensile stress of the skirt material is 960 kg/m², and the permissible compressive stress is 1/3 of the yield stress of the material. The yield stress is 2400 kg/cm². Estimate the thickness of the skirt support.