2023 New York Laws › LAB - Labor › Article 11 - Factories › Title 3 - Fire Hazard › 264 - Fireproof Building.

§  264.  Fireproof  building.  "Fireproof  building"  means a building
conforming to the following requirements:
1. All exterior walls shall be constructed  of  brick,  or  stone,  or
concrete, or cinder block, or concrete block, or tile, or terra cotta or
such other material as shall be specified in the rules of the board. The
board  shall  determine and specify in its rules such requirements as it
deems necessary for the construction of exterior walls.
2. All floors and roofs shall be built of brick, or cinder  block,  or
concrete  block,  or  tile,  or  terra  cotta,  or  reinforced  concrete
supported by steel or reinforced concrete beams and girders.  The  board
shall  determine  and  specify  in  its  rules such other materials, the
manner of construction of floors and roofs and such  other  requirements
as  may  be  deemed  necessary  to  carry into effect the intent of this
chapter.
3. All structural metal shall be encased  in  fireproof  material,  of
such thickness as shall be specified in the rules of the board.
4. All vertical openings leading from one floor to another, except one
created  by  a  mezzanine  floor,  shall  be  enclosed  by  fireproof or
fire-resisting materials in a manner conforming to rules adopted by  the
board.
5.   All  stairways,  landings,  hallways,  floor  surfaces,  furring,
ceilings,  partitions,  sash,  trim,  window  frames,  doors  and  other
interior  finish,  shall  be  constructed of incombustible material; but
nothing in this section  shall  prevent  the  use  of  such  combustible
materials  as  the  board shall determine and specify in its rules. Such
rules shall also specify the circumstances  or  conditions  under  which
combustible  flooring, trim, acoustical material, insulating material or
other  interior  finish  may  be  used  or  applied  to  floors,  walls,
partitions or ceilings of fireproof buildings.
6. All windows shall be fire windows except:
a. In buildings less than seventy feet in height erected after October
first, nineteen hundred and thirteen, where the windows are located more
than  thirty feet from another building or open on a court or space more
than thirty feet wide;
b. In buildings less than one hundred and fifty feet in height erected
before October first, nineteen hundred and thirteen, where  the  windows
are located more than thirty feet from another building.
c.  Fire  windows  may  be  provided  with  plate  glass not less than
one-fourth of an inch in thickness, no light of which shall exceed seven
hundred and twenty square inches in area.
(1) If the windows are located more than thirty feet  horizontally  or
fifty  feet  vertically  from the nearest opening in the wall of another
building.
(2) If the windows are located more than  fifty  feet  in  a  vertical
direction  above  the roof of a building within a horizontal distance of
thirty feet of the wall in which the said windows are located.
7. Partitions. All partitions in the interior of  fireproof  buildings
shall  be  of  incombustible  material.  Nothing  in  this section shall
prevent the use, in a building equipped with  automatic  sprinklers,  of
subdividing  partitions  of  wood,  or of wood and glass, in spaces used
solely for office or show-room purposes, provided, however,  that  where
such  spaces  are contiguous to any room or rooms in which manufacturing
is carried on, such spaces shall be separated from such room or rooms by
a  dividing  partition  which,  including  doors,  is   constructed   of
incombustible material.