Steel Systems is the leading self-storage company of NCI Building Systems. NCI is one of the largest integrated manufacturers and marketers of metal building components, custom-engineered metal building systems and metal coil coaters in North America.  All of our steel building systems are expertly manufactured in our 16 AISC-certified plants strategically located across North America. More than 1.4-million square feet of manufacturing locations allow for the fast, dependable delivery of  mini-storage projects to customers throughout the United States and beyond.  Steel Systems is the leading self-storage company of NCI Building Systems Inc., one of the largest integrated manufacturers of metal construction products and services in the nation.