What are Steel Buildings ClearSpan offers a complete range of Pre-engineered Building Systems for various applications. These buildings can be designed, manufactured, and installed at the site as per customer requirements considering local wind & seismic loading conditions. Buildings can be designed as per AISC/MBMA, IS code, or Nepal Building Construction Code/References. These buildings can be large clear-span or multi-span structures for industrial purposes, and multi-story buildings for residential or commercial applications.