Protec Engineered Buildings

Sioux Steel Company established in 1918 and based in South Dakota, USA is the world oldest grain silos/bins manufacturing and exporting company. Sioux Steel has world class products and wide range of grain storage Flat Bottom Silos/Bins, Hopper Bottom Silos/Bins, Structural Building, Paddle Sweep, Dust Suppression System etc. We have a full line of farm and commercial silos from 15’ (4.57 meter) diameter up to 132’ (40.23 meter) diameter and hopper bottom feed and grain silos from 12’ (3.65 meter) diameter up to 36’ (11 meter) diameter. Sioux Steel products are tested, proven and backed with almost 100 year quality engineering experience. We are also pleased to inform that Sioux is the only US Company giving 10 years warranty on the grain Silos which itself justifies the product quality.