Arizona republican., 1916-02-17

above thc inlet. and eight inches thick for the remaining height; flues larger than one thousand square inches, inside area. shall be propor- tionately increased in size. and shall he lined with fire brick for at least twenty feet above the inlet.
 Bakery oven flues shah not be less than twelve inches square in the clear inside measurement, and shall have masonry walls not less than eight inches thick.
 The inside four inches of the walls for all smoke flues for boilers of over twenty-five horse power shall, for the distance of twenty-five feet above the source of heat and three feet below, be constructed of fire brick laid in fire mortar. All chimneys having a greater flue area than two hundred and sixty square inches, inside measurement, shall be carried up at least eight feet above the highest point of the roof of the building in which they are To- Cated
 All inlets of smoke pipes into chim- neys or flues shall be terra cotta thimbles not less than one inch thick. set in place as the construction pro- gresses. Thimbles shall be sur founded by four inches of brickwork brought flush with the turing, and shall extend to the face of the plas- tering and be not nearer than six inches to any woodwork.
 No chimney shall be supported bv or upon any floor or beam. of wood. but shall be supported from the ground up, or by masonry or concrete. NO chimney shall be corbelled out more than eight inches from the wall, provided that no corbelling shall be more than four inches in nine inch walls. No chimney or flue shall be offset or drawn over for any purpose, more than one-third of it's exterior width or thickness
 No joists or girders shall be sup ported on the walls of any chimney or fiue. No woodwork shall be placed nearer than two inches to the out side face of any smoke flue. All wooden joists shall be trimmed away at least two inches from any smoke flue.
 All chimneys and flues shall ex- tend at least four feet above flat roofs except as hereinafter required Where chimneys or flues project through a pitched roof at or near the ridge of peak thereof, they shall project not less than two feet above such ridge or peak. Where chimneys or flues pierce the roof at the caves or at the slopes of the roof, they shall extend above that portion of the roof rot less than five feet. If any such chimney projects above the roof to a height of more than six times it's least cross section, it shall be braced with an iron rod or pipe not less than one inch in diameter with a fixed washer at each side of such chimney which brace shall extend through such chimney at a point not more than four feet below the top thereof Every chimney projecting above the roof more than six times the thickness of its least cross section, shall have at least three four-inch cross walls, or two eight-inch walls across it's least width. and all such chimneys shall be laid in cement mortar from the top thereof to the first tier of joints be- low the roof joists as provided fol under head of Fire Walls'
 Sect. 2l. Fire Places. All fire places and chimney breasts in any building or structure shall have trim mer arches not less than four inches in thickness to support the hearth unless same shall rest upon solid earth filings. Such arches shall be of brick. stone or concrete and shall be at least twenty inches wide, measured from the face of the fireplace, and their the chimne' breast Such hearth shall be not less than two inches in thickness additional to such arches Wood centers shall be removed from trimmer arches Of such fireplaces and chimney breasts after the same shall have been constructed. No timber of any kind shall be left under any trim mer arch. fireplace or hearth. Hearths shall be of brick, tile, stone or con- crete at least three inches thick. The firebacks and iambs of all fireplaces shall be of solid masonry not less than eight inches thick. No wood construc- tion shall he placed within eight inches of any fireplace opening Sect. 22. Terra Gotta Chimneys There may be erected in buildings and other structures in that portion of the .fI and Special Fire Limits chimneys of terra cotta pipe. The walls of such terra cotta pipe chimneys shall be not less than three -fourths of an inch thick, and all terra cotta pipe used in the construction of such chimneys shall be free from checks, cracks and other such defects. If such terra COtta pipe or chimney be supported on a bracket such bracket shall be securely fastened to the building Be- tween the inlet to such pipe or chim- ney and the bracket or floor sustain ing the same there shall be at least six inches of cement mortar on a sheet of metal and there shall be a clear space of at least two inches between such terra cotta pipe or chimney and any woodwork, and if the intervening space between such woodwork and such pipe or chimney is to be closed the same shall be closed with tin or iron.
 All terra cotta chimneys or pipes shall be securely strapped and fas- tened to the building by means of iron straps. and all joints in such chim- reys or pipes shall be thoroughly ce- mented. No terra cotta chimney or pipe shall be concealed by walls, cell ing or roof. but shall be exposed to view at every point thereof.
 Sect. 23 SmOkestacks of iron or steel. Smokestacks of iron or steel passing through floors. ceilings, roof or partitions of any building or struc- ture shall not be constructed or per