1924 ORDINANCES - Laserfiche WebLink

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39i (d) The smoke flue of every high pressure steam boiler, and every appliance producing a corresponding temperature in a flue, if built of brick, stone, reinforced concrete or other approved masonry, shall have walls not less than twelve (12) inches thic4, and the inside four(4) inches of such walls shall be fire brick laid in fire clay mortar, for a distance of at least twenty-five (254, feet from tiie point where the smoke connection of the boiler enters the flue. (e) The top f, or any openings in, a chimney shall be at least three feet above the point of contact with flat roof or two feet above the ridge of a pitched roof. (f) Portland Cement mortar only shall be used in the construction of chimneys. (g) No chimney in any building shall have wo,)den supports of any kinds supports shall be incombustible and shall rest upon the ground of the foundation. (h) All chimneys which are dangerous from any cause shall be repaired and made safe or taken down. (i) Metal smoke stakeks may be permitted for boilers, furnaces, and simiar apparatus where large hot fires are used, provided they have a clearancefrom all combustible material of not leas than one-half the diameter of the stack, but not less than fifteen 115) inches unless the combustible material be properly guarded by loose -fitting metal shields, in which case the distance shall not be less than 12 inches. Where such stack passes through a roof, it shall be guarded by a galvanized iron ventilating thimble extending from at least nine (9) inches below the under side of theceiling or roof beams, to at least nine (9) inches above the root, andthe diameter of the ventilating thimble shall be not less than thirty-six (36) inches greter than that of the smoke stack. Metal smoke stakka shall not be permitted to pass through floors. (j) The fireback of every fireplace hereafter erected shall be not less than eight (8) inches in thickness of solid brickwork, nor less than twelve (12) inches of stone lined with firebrick. when a grate is eat in a fireplace a lining of firebrick at least two (2) inches in thickness shall be added to the fireback; soapstone, tile, or cast iron may be use, if solidly backed with brick or concrete. (k) All flue holes when not in use shall be closed with tight -fitting metal covers. Sec. 65. Wooden Beams separated from masonry chimneys. (a) No wooden beams or joists shall be placed ewithin two (2) inches of the out- side fice of chimney or flue, whether the same le for smoke, air, or art other purpose. (b) No wo )dwork shall be within four (4) inches of the back wall of any fireplace. (c) All spaces between the chimney and the wooden beams shall be Solidly filled with mortar mineral wool, or other incombustible material. • (d) The header beam, carrying the tail beams of a floor, and supporting the trimer arch in front of a fireplace shall be not less than eighteen (18) inches from the chimney breast. (e) No wooden ferrying or studding shall be placed against any dhimney; the Plastering shall be directly on the masonry, or metal lathing. (f) Woodwork fastened to plaster which is against the masonry of a chimney shall have a layer of asbestos board at least 1/8 inch thick placed between the woodwork and the Plaster, Sed. 66. Smoke pipes* (g) No smoke pipe shall be within six (6) inches of any woodwork, or any wooden lath and plaster partition or ceiling.