Section 27-864. Chimney supports

(a) Chimneys shall not be supported by the
  equipment  they  serve  unless  such  equipment  has  been  specifically
  designed for such loads.
    (b)  An  exterior  metal  chimney shall be supported on an independent
  substantial masonry or concrete foundation designed in  accordance  with
  the  provisions  of subchapters ten and eleven of this chapter. Interior
  metal chimneys  may  be  supported  on  noncombustible  construction  at
  intermediate levels.
    (c)  Masonry  and concrete chimneys may be designed and constructed as
  free standing, or as constituting an integral part of a wall, or may  be
  enclosed  within  a  structure  without  constituting  a  component part
  thereof.
    (d) Masonry  and  concrete  chimneys  shall  be  wholly  supported  on
  noncombustible  construction  that  shall conform to the requirements of
  subchapters ten and eleven of this chapter, and shall not be required to
  support any direct load  other  than  the  weight  of  the  chimney.  No
  supports shall project into the chimney flue or flue lining.
    (e)  Supports  for  listed  chimneys  shall be listed and installed in
  accordance with the listing and acceptance.