Prior to extensive renovations and/or a change of use to an existing building, a seismic analysis may be required by the “International Building Code”, the Owner, or the Owner’s insurance company. The seismic analysis provides valuable insight into the building’s structural behavior during a seismic event. The seismic study provides very necessary information for any subsequent upgrading of the building’s structure to better resist the significant seismic requirements local to the Charleston, South Carolina geographic area. The Sheridan Corporation, as the structural engineer-of-record, has performed seismic studies on existing buildings of all types and sizes. Our seismic studies on important public buildings include the seismic study and report of Building 234 (7-story Public Works Building), Charleston Naval Base, Charleston, South Carolina, the seismic study and report of the Basic Science Building (7-story building), Medical University of South Carolina in Charleston South Carolina, the seismic study and report of Building 32 (Historic Power House), Charleston Naval Base, Charleston, South Carolina, and the seismic study and report of the Sullivan’s Island Elementary School, Sullivan’s Island, South Carolina.