S.C. Code § 5-25-630
No opening in any interior masonry wall shall exceed eight feet by ten feet. If the opening be in a party or fire wall, it shall have a standard automatic fire door on each side of the wall. If an opening in a fire wall is made to serve as an emergency exit, it shall not exceed forty-eight square feet in area and a self-closing fire door shall be substituted for one of the automatic fire doors. The total openings in a fire wall shall not exceed twenty-five per cent in lineal length of the wall. Every building within the fire limits, except churches, dwellings, tenement houses, dormitories and lodging houses, shall have standard fire doors, shutters or wired glass in incombustible frames and sashes on every exterior opening above the first story, except when fronting on a street not less than thirty-five feet wide, or when no other building is within thirty-five feet of such opening. The wall of a building in the same plane as that in which the opening is situated shall not be considered as coming within the intent of this rule. All openings in the side and rear walls of the first story, except show windows, shall be protected as prescribed in this section when within thirty-five feet of another building. All windows more than seventy-five feet above the curb shall have incombustible frames and sash glazed with wired glass. Occupants of buildings shall close all exterior and interior fire doors, shutters and windows at the close of business of each day.
S.C. Code § 5-25-630