NY Mult Dwell L § 238 (2021)
2021 New York Laws MDW - Multiple Dwelling Article 7 - Tenements Title 2 - Fire Protection 238 - Stair and Entrance Halls.

§  238.  Stair  and  entrance  halls.  All stair and entrance halls in   tenements shall be constructed as provided in this section.1. In tenements erected after April twelfth, nineteen hundred one:a. On every story there shall be fireproof doors and  assemblies  with   the  doors  self-closing  separating  every such stair and entrance hall   from all non-fireproof parts of the tenement.b. There shall be no transom, sash or similar opening of any kind from   such stair and entrance halls to any other part of the tenement.c. If such tenements are non-fireproof,  and  are  occupied  by  three   families or more on any story or are five stories or more in height, the   stair  and  entrance halls shall be enclosed with brick walls, except as   provided in paragraph a of subdivision three.2. In tenements  erected  after  April  fourteenth,  nineteen  hundred   three:a.  Every  entrance  hall  shall  be at least three feet six inches in   clear width from the entrance up to and including the  stair  enclosure,   and  beyond  that  at  least three feet in clear width. If such entrance   hall is the only entrance to two stairs or more,  that  portion  of  the   hall  between  the  entrance  and  the  first stair, including the stair   enclosure, shall be at least five feet three inches in clear width.b. Such halls shall comply  with  the  requirements  of  sections  two   hundred   thirty-four  to  two  hundred  thirty-seven  inclusive  as  to   construction of stair and entrance halls, except that if such  tenements   are  fireproof  entrance hall enclosures need only withstand a fire test   of two and one-half hours and angle iron construction may be substituted   for brick walls.c. In every such tenement access shall be provided from  a  street  to   the yard either in a direct line or through a court.d. If such tenements are occupied by not more than two families on any   story  and  are  not more than four stories in height, the floors of the   stair and entrance halls shall be fireproof or  filled  in  between  the   floor  beams with at least five inches of concrete deafening. The stairs   shall be fireproof, or may be of wood provided the soffits of the stairs   are fire-retarded, or covered with plaster board at least one-half  inch   thick,  with  all  joints  true and well pointed. The stair and entrance   halls in such tenements shall be enclosed on all sides with brick  walls   or  with  partitions  of  angle iron and fireproof blocks four inches or   more in thickness, except as provided in paragraph e.e. If such tenements are occupied by not more than two families on any   story and are not more than three  stories  in  height,  the  stair  and   entrance halls may be enclosed in wood stud partitions, fire-retarded on   both  sides, or covered with plaster board at least one-half inch thick,   with all joints true and well pointed and with the  spaces  between  the   studs filled in with brick to the height of the floor beams.3.  In  tenements  erected  after  April  eighteenth, nineteen hundred   twelve:a. If such tenements are occupied by three or  more  families  on  any   story,  or  are  five stories or more in height, the stairs and entrance   halls shall  be  fireproof  throughout  and  all  stairs  provided  with   handrails,  except that stair treads two inches or more in thickness and   handrails may be of hard wood.  All  windows  in  such  halls  shall  be   fireproof  and, except for windows opening on a street in a tenement six   stories or less in height, shall be glazed with wire glass.  Such  halls   shall be enclosed with brick walls, except that one or more sides may be   left open to a street, yard or court.b.  Public halls which are more than forty feet in length and are used   as a means of egress from four or more  apartments  shall  be  fireproof    throughout  and  doors  opening  therefrom and their assemblies shall be   fireproof with the doors self-closing.4. In old-law tenements four stories or more in height:a. Whenever the entrance halls of any such tenements adjoin they shall   be separated by a fire-retarded wall.b.  The  walls and ceilings of every entrance hall and stair hall, and   every public hall connected therewith, and the  soffit  of  every  stair   shall  be fire-retarded. In all such halls all wood wainscoting except a   flat base and stair stringers ten inches or less in height, and all wood   railings, balustrades and newel posts shall be  removed  completely  and   replaced  with  metal or other hard incombustible materials of such size   and secured in such manner as may be approved by the department,  except   that handrails may be of hard wood.c.  Every  door  opening  into any entrance hall or stair, or into any   public hall connected therewith, shall  be  self-closing;  every  glazed   opening  or glazed panel in such a door shall be glazed with wire glass,   and every transom opening into any public hall shall be glazed with wire   glass and permanently secured in a closed position.d. Every interior sash, or opening other than a door, in the walls  or   partitions  of  such  halls, and every window therein not opening to the   outer  air,  shall  be  removed  and  the   openings   closed   up   and   fire-retarded.