(a) The back and sides of fireplaces hereafter erected shall be of solid masonry or reinforced concrete, not less than eight inches in thickness, and this thickness shall extend up to and beyond the bottom of the flue lining. A lining of fire brick at least two inches thick or other approved material shall be provided unless the thickness is twelve inches.
(b) Fireplaces shall have hearths of brick, stone, tile or other approved noncombustible material supported on a fireproof slab or on brick trimmer arches. Such hearths shall extend at least twenty inches outside the chimney breast and not less than twelve inches beyond each side of the fireplace opening along the chimney breast. The thickness of the hearth shall be not less than six inches at any point.
(c) Wooden forms or centers, used in the construction of a hearth or fireplace, shall be removed when the supporting construction of the hearth is completed and adequately set.
(d) No heater shall be placed in a fireplace which does not conform to the requirements of this chapter or is not provided with a flue, except electric or gas heaters of a type specifically approved for such installations.
(e) The one and one-half inches required clearance, and other spaces between the chimney and joists, beams or girders and any other combustible materials, shall be fire-stopped by filling with noncombustible material.
(Ord. 42-1981. Passed 2-23-81.)