NY Mult Dwell L § 107 (2021)
2021 New York Laws MDW - Multiple Dwelling Article 4 - Fireproof Multiple Dwellings Title 1 - Fire Protection 107 - Public Halls.

§  107.  Public halls.  1. Every public vestibule or other public hall   shall  comply  either  with  the  provisions  of  section  one   hundred   forty-nine  for  non-fireproof multiple dwellings, so far as applicable,   or with the provisions of subdivision two of this section,  except  that   the  provisions  as  to  ventilation  shall  not apply to any part of an   entrance hall within sixty feet in a  straight  line  from  an  entrance   door.2.  If  such a dwelling does not comply with the applicable provisions   of section one hundred forty-nine, it  shall  comply  with  all  of  the   following:a.  Every  public vestibule or hall shall be everywhere at least three   feet eight inches in clear width.b. Every such public vestibule or hall shall  be  separated  from  all   other parts of the dwelling by fireproof walls.c.  All  openings  from  such  a  public  vestibule or hall to stairs,   fire-stairs, fire-tower balconies, shafts, apartments or suites of rooms   shall be protected by fireproof doors and  assemblies,  with  the  doors   self-closing,  except  that  such  doors  and  assemblies  shall  not be   required in any fireproof class B multiple dwelling  for  any  apartment   consisting  of  one  room opening directly upon a public hall or for any   apartment of three rooms or less in a college or school dormitory.d. Such a public vestibule or hall shall not be  required  to  have  a   window,  but  if  it  does not have a window opening to the outer air it   shall be equipped for artificial lighting and be properly lighted at all   times.e. Except for that part of an entrance hall within  sixty  feet  in  a   straight  line  from  an  entrance  door such a public vestibule or hall   without a window to the outer air shall be ventilated to the  outer  air   by  means of gravity vent flues at least twelve inches in each dimension   or by mechanical means approved by the department.  There  shall  be  at   least  one vent flue opening of at least twelve inches in each dimension   for each one thousand cubic feet of air content of such public vestibule   or hall. Such vent flues shall be  continuous  for  the  height  of  the   dwelling  and  the  openings  at  each story shall be equipped with fire   dampers held open by a fusible link at each opening and properly  hooded   or provided with louvres at the top above the roof.f.  If  a  window  to  the  outer  air  is provided in any such public   vestibule  or  hall,  such  vestibule  or  hall  shall  nevertheless  be   ventilated  as provided in paragraph e, except that if such a window has   a glazed area of at least twelve square feet and at least one  tenth  of   the  superficial floor area of the vestibule or hall, readily accessible   to the outer air to the extent of at least five and one-half square feet   of its area, no vent flues need be provided within a distance  of  forty   feet from each side of such window.3.  The  requirements of this section as to ventilation shall apply to   all parts of an entrance hall more than sixty feet distant in a straight   line from an entrance door, to all returns  or  recesses  that  lead  to   elevators  and  extend farther from the hall which they adjoin than four   times their width, and to all other returns or  recesses  from  entrance   halls that extend farther than their width.4.  Any  part of a public hall that is shut off from any other part of   such hall by a door or doors shall be deemed a separate hall.