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Openings shall be deemed to face an interior lot line or the wall of another building when the plane of the opening forms an angle of less than 60 degrees with the plane of such lot line or wall.
(a) Protection of openings in exterior walls, except as required for protection of vertical exits in chapter 13-160, shall not be required in the following buildings:
(1) church auditoriums;
(2) residential units not more than four stories in height; and
(3) buildings of any occupancy of Types IV- A or IV-B construction.
(b) In all other buildings, the following openings in exterior walls shall be protected with Class D or Class E fire doors, fire windows or other approved opening protective assemblies complying with the requirements of Chapter 15-12.
(1) Openings facing an interior lot line or the opposite side of a public way at a distance of less than 12 feet;
(2) Openings facing an opening in the exterior wall of another building at a distance of less than 12 feet;
(3) Openings facing the wall of a building of Type IV-B construction at a distance of less than 12 feet;
(4) Openings less than 50 feet above and less than 12 feet horizontally from the roof of another building;
(5) Openings adjacent to smokeproof towers, horizontal exits, exterior stairways or fire escapes shall be protected as required in Sections 13-160-390, 13-160-510, 13-160-600 and 13-160-650;
(6) Openings in a garage, less than 30 feet vertically or horizontally from an institutional use in a mixed occupancy.
(Prior code § 62-2.4; Amend Coun. J. 10-28-97, p. 54730)