15-8-100 Parapets.

   Exterior walls of buildings of Type III-A, III-B and III-C shall each be provided with a parapet having a fire resistance not less than that required for the walls.

   (a)   Parapets shall not be required on:

      (1)   Exterior walls connecting with roofs of fire-resistive construction;

      (2)   An exterior wall of a building the roof of which is at least three feet lower than the roof of, or any opening in, an adjacent building wall;

      (3)   Exterior walls facing on a street having a width of 30 feet or more;

      (4)   Exterior walls of a building which is 30 feet or more distant in all directions from the nearest line to which other buildings are or may be legally built and from other buildings on the same lot;

      (5)   In single-family and two-family dwellings not more than two stories and attic in height located not less than three feet from a lot line;

      (6)   Exterior walls of a building not exceeding 1,000 square feet in area;

      (7)   Exterior walls of a building which is 30 feet or more distant in all directions from the nearest line to which other buildings are or may be legally built but less than 30 feet distant to one or more buildings on the same lot, where the total area of the buildings within 30 feet of each other does not exceed one and one-half times the allowable area for any of the buildings considered;

      (8)   Exterior walls of a building where the roof has an angle of more than 20 degrees with the horizontal.

   (b)   Parapets on exterior walls required to have a fire resistance rating of two hours shall extend not less than two feet above the roof; parapets on exterior walls required to have a fire resistance rating of three or four hours shall extend not less than three feet above the roof; parapets on fire walls shall extend at least to the same height as any part of the roof through which the fire wall passes within 15 feet of the parapet and in no case shall it extend less than three feet above the point where the parapet and roof intersect.

   (c)   Masonry and reinforced parapets shall be at least as thick as the required thickness of the wall on which it is provided but need not be more than 12 inches thick on exterior walls.

   (d)   Parapets shall be properly coped and flashed with noncombustible, weatherproof material. All corners of masonry parapet walls shall be reinforced with at least one one-fourth-inch bar in every third joint, continuous around the corner and extending into the masonry at least three feet from the corner.

(Prior code §  62-2.3)