NY Lab L § 270 (2021)
2021 New York Laws LAB - Labor Article 11 - Factories Title 3 - Fire Hazard 270 - Construction of Buildings Erected After October First, Nineteen Hundred and Thirteen.

§ 270. Construction of buildings erected after October first, nineteen   hundred  and  thirteen.  No  factory  shall  be  conducted in a building   erected after October first, nineteen hundred and thirteen, unless  such   building shall conform to the following requirements:1.  Fireproof  construction.  All  buildings more than four stories in   height shall be fireproof.2. Roofs and walls. Roofs shall be covered either  with  incombustible   material,  or tar and slag, or plastic cement or such other materials as   the  board  may  approve,  supported   and   laid   according   to   its   specifications. Cornices shall be constructed of incombustible material.   All  exterior  walls within twenty-five feet of a non-fireproof building   shall be built of brick, stone, concrete, cinder or  concrete  block  or   tile,  terra  cotta  or other fireproof material acceptable to the state   department of labor.3. Required exits. a. On each floor used as a factory there  shall  be   not  less  than  two  exits remote from each other, except that a single   exit may be accepted by the commissioner from a floor or other area,  of   one  thousand  square  feet  or  less, so long as no person is regularly   employed on such floor or other area. One such exit on each  floor  used   as  a  factory  shall  be a grade exit, an interior or exterior enclosed   fireproof stairway or ramp. The other shall be either such a grade exit,   stairway, ramp, or a horizontal exit, except  that  unenclosed  exterior   stairways  or  ramps  within  the property line, extending up or down to   grade may be substituted for enclosed stairways from a floor immediately   above or below the ground or first floor. Elevated runways  and  working   platforms  on which there is no regular or permanent occupancy shall not   be construed as floors.b. No point in any floor above or below  the  ground  or  first  floor   shall  be  more  than  one hundred feet distant from the entrance to one   such exit at that floor and in a  sprinklered  building  more  than  one   hundred  and  fifty feet distant from such exit. No point in any ground,   or first floor shall be more than two hundred feet distant from an  exit   from  that floor and in a sprinklered building more than two hundred and   fifty feet distant from such exit; provided that no point in any ground,   or first floor of a building erected after July first, nineteen  hundred   forty-eight,  in  which  a  factory is conducted, shall be more than one   hundred fifty feet distant from  an  exit  from  that  floor  and  in  a   sprinklered building more than two hundred feet distant from such exit.c. In every building over one hundred feet in height there shall be at   least one exterior fireproof enclosed stairway which shall be accessible   from any point in the building.4.  Stairways  and ramps. a. All required interior stairways and ramps   shall be constructed of  incombustible  material.  Two  hour  fire  test   enclosures  shall  be  provided in buildings over two stories in height,   and in all subgrade stories. One hour  fire  test  enclosures  shall  be   provided for all other stairs and ramps in buildings two stories or less   in  height.  All stairways and ramps shall have an unobstructed width of   at least forty-four inches throughout  their  length  except  that  hand   rails  may  project  not  more  than three and one-half inches into such   width.  There shall be not more than twelve feet six  inches  in  height   between  successive  landings.  The  treads  shall  be not less than ten   inches wide and the risers shall be closed and not more than  seven  and   three-fourths inches. No stairway with "winders" shall be permitted as a   required  exit.  The treads shall be constructed and maintained so as to   prevent persons from slipping thereon. Ramps used in place  of  required   exit  stairways  shall have a slope not exceeding one foot in eight feet   and shall comply with the requirements for  stairways  as  to  material,    width,   enclosure,   ventilation,  landings  and  shall  have  non-slip   surfaces.b.  Every  such  required  interior  stairway  shall  be  enclosed and   ventilated in a manner conforming to rules adopted by the board,  except   that  unenclosed  stairways, no part of whose floor opening is more than   twenty feet from an open side of the mezzanine and  which  lead  to  the   floor  immediately  below,  may be accepted from an unenclosed mezzanine   not  exceeding  twenty-five  hundred  feet  in  area,  unless  otherwise   specified by the board in its rules.c.  Exterior  windows  within  twenty-five  feet  of  a  non-fireproof   structure shall be fire windows. Skylights, unless provided  with  wired   glass,  shall have thereunder a shield of wire mesh in substantial frame   work.d. Whenever safe egress may  be  had  from  the  roof  of  a  building   exceeding  two  stories in height to an adjacent structure all stairways   serving as required exits shall extend to the  roof,  provided  that  in   buildings  over  five  stories  in  height at least one of the stairways   serving as required exits  shall  extend  to  the  roof.  All  stairways   serving  as required exits shall lead (a) continuously to the street, or   (b) to a fireproof  passageway  independent  of  other  exits  from  the   building  opening  on a road or street, or (c) to an open area affording   unobstructed passage to a  road  or  street,  except  that  unobstructed   access  to  exits  on  the  floor  immediately below may be accepted for   stairways from a mezzanine floor unless otherwise specified by the board   in its rules. Provision shall be made for the adequate lighting  of  all   stairways,  ramps  and  passageways by artificial light. Where more than   two stairways are provided in a building, not more  than  two  may  lead   through  a  common  fireproof  passage  to  a street. Required stairways   terminating at a floor below roof shall be connected at floor  at  which   such  stairs terminate through a fireproof passage to at least one other   required stairway.5. Doors and doorways. All doors at required exits  or  that  lead  to   required  exits  shall  open  outwardly.  The  width  of  the  fireproof   passageways and exit doorways including stops, leading to the street  at   the  grade  level shall be not less than the aggregate required width of   all stairways and ramps leading to them. The aggregate capacity  of  all   other  required  exit  doorways  shall  be  calculated  on  the basis of   twenty-two inches for each fifty  persons  or  fraction  thereof  to  be   served  by  such  doorways,  but  no  such  doorway  shall  be less than   thirty-six inches in width.The provisions of this section shall not apply to  a  building,  in  a   city  having  a population of more than one million, used exclusively by   one employer and in which not more than one-tenth  of  all  the  persons   employed therein are engaged in work for a factory and which, except for   such factory work, would be classified as a mercantile establishment.