A high density occupancy room shall have a ceiling height of eight feet (8') or more throughout the room, except as otherwise provided in this section.
Under beams, pipes, ducts, and other construction projections from the ceiling, there shall be a minimum clear head room of six feet, eight inches (6'8") in each high density occupancy room.
D.C. Mun. Regs. tit. 14, r. 14-1310