Your Source for High Performance Poles. Join our Facebook page at: http://www.facebook.com/pages/Guelph-ON/Sky-Cast-Inc/142935112446879 Sky Cast is setting new standards for prestressed spun concrete poles. From selection to production to delivery, we put the right pieces into place to provide our customers with the best concrete pole product available - from the ground up. Why choose prestressed spun concrete poles? Unlike static cast poles, prestressed spun poles are centrifugally cast. This process produces poles with the highest density and strength-to-weight ratio of any concrete available. As a result, they are more durable, longer lasting, and resistant to freeze/thaw cycles and chemical agents such as road salt and salt air.