Where a court is provided in an Industrial District, that court shall have the dimensions specified in this section.
An open court shall be at least two and one-half inches wide per foot (2.5 in./ft.) of height of court, but not less than six feet (6 ft.) wide.
A closed court shall be at least two and one-half inches wide per foot (2.5 in./ft.) of height of court, but not less than twelve feet (12 in.) wide.
A closed court shall have an area at least twice the square of the required width of court dimension based on the height of court, but not less than two hundred fifty square feet (250 ft.2).
In the case of an alteration affecting the amount of light and ventilation required by other municipal law or regulation in an existing building in any Industrial District, no legally required window shall be permitted to open onto a court that does not comply with the dimensions in §§ 844.1 through 844.4.
D.C. Mun. Regs. tit. 11, r. 11-844