Section 27-353.1. Smoke protection for elevators and escalators

(a)
  Elevators.  In existing buildings classified in occupancy group J-1,  at
  every  floor  above  the  main  entrance floor, all passenger elevantors
  shall open only into elevator vestibules, except for:
    (1)  Such  existing  buildings  which  contain  spaces  classified  in
  occupancy group C or F and have an automatic sprinkler system protecting
  all  spaces  (except  boiler  rooms)  not in occupancy group J-1 and all
  exits and corridors serving such spaces located on or below  the  lowest
  floor containing sleeping rooms as well as all storage closets no matter
  where located, except that storage closets less than seventy-five square
  feet  may,  in  the  alternative, be provided with smoke detectors which
  shall be of the  central  supervisory  type  connected  to  an  approved
  central station; or
    (2) Such existing buildings which contain no spaces in occupancy group
  C or F, and have either:
    a.  An  automatic  sprinkler  system  protecting  all public areas and
  storage closets; or
    b. An automatic sprinkler system protecting  all  sleeping  rooms  and
  storage closets.
    c.  Notwithstanding  subparagraphs  a and b of this paragraph, storage
  closets less than seventy-five square feet may be  provided  with  smoke
  detectors  of  the  central  supervisory  type  connected to an approved
  central station.
    d. Notwithstanding any other provision of this  code,  the  sprinklers
  serving  the  storage  closets  may be connected with the domestic water
  supply.
    (b) Escalators. In buildings  and  existing  buildings  classified  in
  occupancy group J-1, fire protection for escalators shall be provided by
  any one of the following methods:
    (1)  Enclosure  in  accordance  with  sections  27-375  and  27-378 if
  escalator is used as an exit; or
    (2) Automatic rolling shutters in accordance with  reference  standard
  RS 18-1; or
    (3) Kiosks in accordance with reference standard RS 18-1; or
    (4)  Where  the  building  section  is fully protected by a supervised
  automatic sprinkler system and the escalator sprinklers  are  spaced  to
  protect  exposed  sides  of the escalator opening, a noncombustible heat
  apron constructed to bank heat around the sprinkler  heads  adjacent  to
  the  opening where the bottom edge of the draft curtain is not less than
  twelve inches below the bottoms of sprinkler heads  when  heads  are  in
  operation,  and  in  no  event  less  than  twenty-four inches below the
  ceiling; or
    (5) Spray nozzles in accordance with reference standard RS 18-1.
    (c) The requirements of this subdivision shall be complied with on  or
  before April first, nineteen hundred eighty-seven.