by Sioux Steel Company Keywords: Advanced Search View All Listings Add Listing Sort By:Default Date posted Sioux Steel Company Listed in Building Packages 605-336-1750 PO Box 1265, Sioux Falls, South Dakota 57101, USA ProTec Buildings provide natural lighting and superior ventilation. Website https://www.siouxsteel.comPhone 605-357-8597 (fax) 0 comment 0 FacebookTwitterPinterestEmail