Sukup Manufacturing Co. is the world's largest family-owned and operated manufacturer of grain storage, drying and handling equipment. The company is headquartered in America's heartland; Sheffield, Iowa.Sukup Manufacturing Co.'s product line includes on-farm and commercial grain bins; portable, mixed-flow and tower dryers; centrifugal and axial fans and heaters; stirring machines; bin unloading equipment and bin floors and supports.Sukup Manufacturing Co. also manufactures material handling equipment including bucket elevators, conveyors and support structures.