Sioux Steel Company has the only bins in the industry for grains weighing up to 70 lbs. per bushel. Commercial bins are backed by a 5-year warranty. The commercial bin roofs are available with up to a 50,000 lb. peak load. ProTec buildings offer flat grain storage solutions with unmatched natural lighting using a tightly woven polyethylene cover. The Daay bin paddle sweep is the safest sweep on the market today, gently cleaning the bin floor using paddles and no augers! www.siouxsteel.com