Openings, other than doors or lights, which form a part of an enclosure, or portion thereof, housing a single occupant and the bottom of which is not more than 16 feet above the grade of a street, highway, yard, court, passageway, corridor, balcony, patio, breezeway or similar area, or from a private garage or a portion of the building which is occupied, used or available for use by the public or other tenants, or an opening enclosing a private garage attached to a dwelling unit which opens therein, shall be constructed, installed and secured as set forth in this chapter.
(2000 Code, § 15.28.180)