(A)   It shall be unlawful for any person or persons to build, construct, or use any chimney, flue, or substitute for a chimney or flue within the limits of Blocks Nos. 2, 3, and 4 in the city unless the same shall be constructed as provided in this section.
   (B)   (1)   All flues and chimneys shall be built of brick, concrete, stone, or hollow tile of clay, concrete, concrete block, or reinforced concrete not less than eight inches thick; provided, that for stone masonry other than sawed or dressed stone in courses, properly bonded and tied with metal anchors, the thickness shall be not less than 12 inches; and provided, that in dwellings, brick or solid concrete chimneys with a fire clay liner used exclusively for ordinary stoves, ranges, furnaces, or fireplaces, the thickness of the masonry may be reduced to not less than three- and three-fourths inches with a two-inch clearance to combustible surfaces.
      (2)   Every flue or chimney shall be lined with a flue lining. High pressure steam boilers, incinerators exceeding nine square feet grate area or of fuel-fired type, and other moderate heat appliances shall have a lining of four inches of fire brick for a distance of at least 25 feet above the flue entrance.
      (3)   Chimneys or flues shall extend at least three feet above the highest point at which they come in contact with a roof of the building and at least two feet higher than any ridge within ten feet of the chimney or flue. They shall be properly capped.
      (4)   Chimneys or flues shall be built upon concrete or solid masonry foundations. The footing for an exterior chimney or flue shall start below the frost line.
      (5)   The back and sides of fireplaces hereafter erected shall be of approved masonry or reinforced concrete not less than eight inches in thickness. A lining of fire brick or other approved material at least two inches thick shall be provided unless the thickness is 12 inches.
      (6)   Fireplaces, except when designed and used only for approved gas appliances, shall have hearths of brick, stone, tile, or other approved incombustible material supported on masonry arches. The hearths shall extend at least 20 inches outside of the chimney breast and not less than 12 inches beyond each side of the fireplace opening along the chimney breast. The combined thickness of hearth and supporting arch shall be not less than six inches at any point.
      (7)   Wooden centers used in the construction of that part of the supporting arch, which is below the hearth of the fireplace inside of the chimney breast, shall be removed when the construction of the arch is completed and before plastering on the underside.
      (8)   Any appliance or flue with current Underwriters Laboratory approval shall be acceptable if installed strictly in accordance with manufacturer provided installation instructions.
(Ord. 03-2013, passed 11-5-2012)  Penalty, see § 153.99