Section 27-996. Existing hand powered freight elevators

Existing hand
  powered freight elevators shall not be subject to the provisions of this
  article. However, adequate  protection  of  landing  openings  shall  be
  provided  by  hinged  or  sliding doors which shall remain locked at all
  times except when the freight elevator is in use.  Auxiliary  gates  not
  less  than  thirty-six  inches  in height, substantially constructed and
  secured in place, of wood or metal, or equivalent metal chains shall  be
  installed.  Such  gates or chains may be arranged to lift vertically, to
  slide horizontally, or to swing. No  part  of  any  gate  or  chain  may
  project   into  the  freight  elevator  shaft.  Gates  may  be  operated
  automatically or manually.