Sukup invests in the worlds most advanced production equipment, this ensures the industries best fitting bin. Strongest Farm Bin Roof- 5000lbs load rating to 30,000 lbs on Commercial roofs. Largest manhole opening. Best hardware in the industry, JS500 plating on their bolts including serrated flange nuts used on the roof. Commercial roofs come equipped with a 1/4' thick, 60' diameter, diamond deck steel peak lid that provides a solid base for conveying equipment or fill spouts. Optional side draw systems available.