is a courtyard which is not roofed, has a minimum width of 40 feet (1219 mm), and
- has an opening a minimum width of 40 feet (1219 mm), with no obstructions, on at least one end, or
- has fences between the buildings for security purposes, and the required exiting capacity of the courtyard is provided for by means of doors or gates from the courtyard.
An exterior courtyard may be considered exterior space and used for exiting of adjacent spaces. For an exterior courtyard with an opening between 40 feet (1219 mm) and 60 feet (18 288 mm) wide, the building walls and wall openings must meet the requirements of this code Tables 601 and 602 and the maximum travel distance to the courtyard opening/exit shall not exceed 150 feet (45 720 mm) from any point within the courtyard. If the minimum courtyard width exceeds 60 feet (18 288 mm), the travel distance to a courtyard opening/exit may exceed 150 feet (945 720 mm).