Article 2 - DEFINITIONS

Section 27-232

Section 27-232

  §  27-232  Definitions. Words that are capitalized are defined in this
section.
  ACCESSORY BUILDING. A building, the  use  or  occupancy  of  which  is
incidental to that of the main building.
  ACCESSORY  USE.  A use or occupancy incidental to the principal use or
occupancy of a building.
  ACCESSIBLE.--A building or portion thereof and  the  accessory  public
areas  thereof  are  accessible  when they comply with subarticle two of
article two of subchapter four of chapter one of title  twenty-seven  of
this  code  and  can  be  approached,  entered and used by people having
physical disabilities.
  ACCESSIBLE  ROUTE.--A  continuous  unobstructed  path  connecting  all
accessible  spaces and rooms in a building that can be negotiated by all
categories of people having physical disabilities.  Interior  accessible
routes  may include corridors, doorways, floors, ramps, elevators, lifts
and clear floor space adjacent to fixtures. Exterior  accessible  routes
may include parking access aisles, curb ramps, walks, ramps and lifts.
  ACCESS  STAIR.  A  stair between two floors, which does not serve as a
required exit. (See EXTERIOR STAIR and INTERIOR STAIR).
  ADAPTABLE DWELLING UNITS.--Dwelling units which are constructed on  an
accessible route and equipped as set forth in reference standard RS 4-6,
so  that  they may be converted to be used, with a minimum of structural
change, by all categories of people having physical disabilities.
  ADDITION. An extension or increase  in  floor  area  or  height  of  a
building that increases its exterior dimensions.
  ADJOINING  GRADE  ELEVATION.  The average elevation of the final grade
adjoining all exterior  walls  of  a  building,  calculated  from  grade
elevations  taken  at  intervals of ten feet around the perimeter of the
building.
  AIR CONDITIONING. The process  by  which  the  temperature,  humidity,
movement,  cleanliness,  and  odor of air circulated through a space are
controlled simultaneously.
  AIR-SUPPORTED STRUCTURE. A structure  consisting  of  skin  diaphragms
made  of  flexible  material,  which  achieves  its  shape, support, and
stability from internal air pressure.
  ALLOWABLE SOIL PRESSURE. The maximum stress permitted  in  soil  of  a
given type and under given conditions.
  ALLOWABLE  STRESS.  The maximum stress permitted at a given point in a
structural member under given conditions.
  ALTERATION. Any addition, or change or modification of a building,  or
the service equipment thereof, that affects safety or health and that is
not classified as a minor alteration or ordinary repair. The moving of a
building  from  one  location  or position to another shall be deemed an
alteration.
  AMUSEMENT ATTRACTION. A game of chance or skill or similar activity in
which the public participates as a form of amusement.
  AMUSEMENT DEVICE. A mechanically operated device or structure, open to
the public, used to convey  persons  in  any  direction  as  a  form  of
amusement.
  APARTMENT HOUSE. (See MULTIPLE DWELLING.)
  APPROVED.  When used in connection with plans, materials and equipment
shall mean approved by the commissioner; when used  in  connection  with
materials  and  equipment,  shall  also  mean previously approved by the
board, unless such approval is amended or repealed by the  commissioner;
otherwise  shall  mean approved by the department or agency indicated by
the text.
  ARCHITECT.  A  person  licensed  to   practice   the   profession   of
architecture under the education law of the state of New York.

  AREA  OF  REFUGE.  A  floor  area  to  which  egress is made through a
horizontal exit or supplemental vertical exit.
  AREAWAY.  A  space  below  grade,  adjacent to a building, open to the
outer air and enclosed by walls.
  ASSEMBLY SPACE. Any part of a place of assembly, exclusive of a stage,
that is occupied by numbers  of  persons  during  the  major  period  of
occupancy. Every tier of seating shall be considered a separate assembly
space.
  ATRIUM.  A  vertical  opening  or series of openings within a building
connecting three or more floors, which may be covered at  the  top,  and
which  is  used  for  purposes other than an enclosed stairway, elevator
hoistway or utility shaft.
  ATTIC. The space between the ceiling framing of the topmost story  and
the underside of the roof framing.
  AUTOMATIC.  As  applied  to  an opening protective, shall mean a door,
window, damper, or other device, and its  assembly,  which  is  normally
open  and  is  designed  to  close  automatically  when  subjected  to a
predetermined temperature, rate of temperature rise, or  abnormal  smoke
condition.
  AUTOMATIC DRY STANDPIPE SYSTEM. A standpipe system in which all piping
is  filled with air, either compressed or at atmospheric pressure. Water
enters the system through a control valve actuated either  automatically
by  the  reduction  of  air  pressure within the system or by the manual
activation of a remote control located at each hose station.
  AUTOMATIC DRY PIPE SPRINKLER SYSTEM. A sprinkler system in  which  the
piping  up  to the sprinkler heads is filled with air, either compressed
or at atmospheric pressure, with the water supply controlled by a Type A
or Type B dry pipe valve.
  AUTOMATIC FIRE PUMP. A pump that maintains a required  water  pressure
in  a  fire  extinguishing  system  and  which is actuated by a starting
device adjusted to cause the pump to operate when the  pressure  in  the
system  drops  below a predetermined pressure, and to stop the pump when
the pressure is restored.
  AUTOMATIC OPERATION. As applied to an elevator, shall  mean  operation
whereby the starting of the car is effected in response to the momentary
actuation  of  operating  devices  at  the  landing, and/or of operating
devices in the car identified with the landings, and/or in  response  to
an  automatic  starting  mechanism,  and  whereby  the  car  is  stopped
automatically at the landings.
  AUTOMATIC WET PIPE SPRINKLER SYSTEM. A sprinkler system in  which  all
piping  and  sprinkler  heads  are  at all times filled with water under
pressure which is immediately discharged when a sprinkler head operates,
with the water continuing to flow until the system is shut off.
  AUTOMOTIVE LIFT. A vehicle-lifting device, the purpose of which is  to
raise  an  entire  vehicle  to  provide  accessibility for under-chassis
service.
  AUTOMOTIVE REPAIR SHOP. A building or space in  which  motor  vehicles
are repaired.
  AUTOMOTIVE  SERVICE  STATION.  A building, space, or premises used for
the storage and sale of motor fuels, and which may also have  facilities
for lubrication, minor repairs, or washing of motor vehicles.
  BACKFLOW  (Water  Supply).  The flow of water or other substances into
the distribution pipes of a potable water supply from any  source  other
than the intended source.
  BALLOON  FRAME.  Light timber construction in which the exterior walls
consist  of  studs  that  are  either  continuous  through   floors   or
interrupted only by thickness of plates.

  BASEMENT.  A  story  partly underground, but having less than one-half
its clear height (measured from  finished  floor  to  finished  ceiling)
below  the  curb  level;  except  that where the curb level has not been
legally established, or where every part of the  building  is  set  back
more  than  twenty-five  feet  from  a  street line, the height shall be
measured from the adjoining grade elevation. (See CELLAR.)
  BEARING. As applied to a wall or partition, shall mean supporting  any
vertical load in addition to its own weight.
  BELT-DRIVE   MACHINE.  As  applied  to  an  elevator,  shall  mean  an
indirect-drive machine having a single belt or  multiple  belts  as  the
connecting means.
  BOARD. The board of standards and appeals of the city of New York.
  BOARDER  (ROOMER, LODGER). An individual living within a household who
pays a consideration for such residence and does not occupy  such  space
as an incident of employment therein.
  BREEZEWAY. A structure open to the outdoors consisting of a roof, roof
supports,  and  floor,  connecting  a garage or other accessory building
with a dwelling.
  BUILDING. An enclosed structure including service  equipment  therein.
The  term  shall  be  construed as if followed by the phrase "structure,
premises, or part thereof" unless otherwise indicated by the text.
  BUILDING HOUSE DRAIN. That part of the lowest  piping  of  a  drainage
system  that  receives  the  discharge  from  the soil, waste, and other
drainage pipes and conveys it to the building house  sewer  by  gravity.
The building house drain shall be considered to extend five feet outside
the exterior wall of the building.
  BUILDING  HOUSE  DRAIN (COMBINED). A building house drain that conveys
storm water in combination with sewage or other drainage.
  BUILDING HOUSE DRAIN (SANITARY). A building house drain  that  carries
sewage only.
  BUILDING  HOUSE  DRAIN  (STORM).  That  part of the lowest piping of a
storm drainage system that receives clear water drainage  from  leaders,
surface  run-off,  ground  water,  subsurface water, condensate, cooling
water, or other similar storm or clear drainage and conveys  it  to  the
building  house  storm  sewer by gravity. The building house storm drain
shall be considered to extend five feet outside the exterior wall of the
building.
  BUILDING HOUSE SEWER. That part of the horizontal piping of a drainage
system that extends from the end of the building house  drain  and  that
receives  the  discharge of the building house drain and conveys it to a
public sewer, private sewer, individual sewage-disposal system, or other
point of disposal.
  BUILDING HOUSE SEWER (COMBINED). A building house sewer  that  conveys
sewage in combination with storm water and other clear water wastes.
  BUILDING  HOUSE  SEWER (SANITARY). A building house sewer that carries
sewage only.
  BUILDING HOUSE STORM SEWER. That part of the horizontal  piping  of  a
storm  drainage  system that extends from the building house storm drain
to the public storm sewer, combined sewer, or other point of disposal.
  BUILDING SECTION. A room, floor, group of floors, wing, or  any  other
portion of a building contained within fire divisions.
  BUILDING SUB-HOUSE DRAIN. That portion of a house drainage system that
cannot drain by gravity into the building house sewer.
  BULKHEAD.  An enclosed structure on or above the roof of any part of a
building, enclosing a shaft, stairway, tank, or  service  equipment,  or
other space not designed or used for human occupancy. (See PENTHOUSE and
ROOF STRUCTURE.)

  CABARET. The term cabaret shall mean any room, place or space in which
any  musical  entertainment, singing, dancing or other similar amusement
is permitted in connection with an eating and drinking establishment.
  CABLEWAY.  A  power  operated  system  for moving loads in a generally
horizontal direction in which the loads  are  conveyed  on  an  overhead
cable, track or carriage.
  CAR  DOOR  OR  GATE. As applied to an elevator, shall mean the sliding
portion of the car that closes the opening giving access to the car.
  CAR DOOR OR GATE SWITCH. As applied to  an  elevator,  shall  mean  an
electrical  device, the function of which is to prevent operation of the
driving machine by the normal operating device unless the  car  door  or
gate is in the closed position.
  CAR-SWITCH  OPERATION.  Operation  of an elevator wherein the movement
and direction of travel of the car are directly  and  solely  under  the
control of the operator by means of a manually operated car switch or of
continuous-pressure buttons in the car.
  CASING-OFF. The elimination of the frictional forces between a portion
of  a  pile and the surrounding soil by use of a sleeve between the pile
and the soil.
  CATCH PLATFORM. A platform or other construction projecting  from  the
face  of a building, supported therefrom, and used to intercept the fall
of objects and to protect individuals and property from falling debris.
  CELLAR. A story partly or wholly underground, but having  one-half  or
more  of  its  clear  height  (measured  from finished floor to finished
ceiling) below the curb level; except that where the curb level has  not
been  legally  established,  or  where every part of the building is set
back more than twenty-five feet from a street line, the height shall  be
measured  from  the  adjoining  grade  elevation.  Cellars  shall not be
counted as stories in measuring the height of buildings. (See BASEMENT.)
  CERTIFICATE OF OCCUPANCY. (See article twenty-two of subchapter one of
this chapter.)
  CHAIN-DRIVE  MACHINE.  As  applied  to  an  elevator,  shall  mean  an
indirect-drive machine having a chain as the connecting means.
  CHARGING  CHUTE  (INCINERATOR).  An  enclosed vertical passage through
which refuse is fed to an incinerator.
  CHARGING GATE (INCINERATOR). A gate in an incinerator used to  control
the  flow  of  combustion gases into the charging chute and the entry of
refuse into the combustion chamber.
  CHIMNEY. A vertical enclosure containing one or  more  flues  used  to
remove   hot  gases  from  burning  fuel,  refuse,  or  from  industrial
processes.
  CHIMNEY CONNECTOR. A pipe or metal breeching that connects  combustion
equipment to a chimney.
  CITY. The city of New York.
  CLOSED SHAFT. A shaft enclosed at the top.
  COATINGS,  FIRE-RETARDANT.  A  material  applied  to  the surface of a
building material to improve its flame spread rating.
  COLLECTING SAFE AREA. A safe area that  receives  occupants  from  the
assembly space it serves as well as from other safe areas.
  COMBINED   HEAT  AND  POWER  SYSTEMS.  Equipment  that  simultaneously
produces electricity and heat from a single fuel source.
  COMMISSIONER. The commissioner of buildings of the city of  New  York,
or his or her duly authorized representative.
  COMPRESSOR   (REFRIGERATION).  A  machine  used  for  the  purpose  of
compressing a refrigerant.
  CONCENTRATED LOAD. A conventionalized representation of an element  of
dead  or live load whereby the entire load is assumed to act either at a
point or within a limited area.

  CONCURRENT LOADS. Two or more elements of dead or live load that,  for
purposes of design, are considered to act simultaneously.
  CONSTRUCTION. Any or all work or operations necessary or incidental to
the  erection,  demolition,  assembling,  installing,  or  equipping  of
buildings, or any alterations and  operations  incidental  thereto.  The
term  "construction"  shall  include land clearing, grading, excavating,
and filling. It shall also mean the finished product of any such work or
operations.
  CONSTRUCTION CLASS (GROUP). The category in which a building or  space
is  classified  by  the  provisions of subchapter three of this chapter,
based on the fire-resistance ratings of its construction elements.
  CONSOLE LIFT. A section of the floor area of a theater  or  auditorium
that can be raised and lowered.
  CONTRACTOR. A person undertaking construction.
  CONTROLLED  INSPECTION.  (See Section 27-132 of subchapter one of this
chapter.)
  CORRIDOR. An enclosed public passage providing a means of access  from
rooms or spaces to an exit. (See EXIT PASSAGEWAY.)
  COURT. An inner court or outer court.
  CRANE.  A  machine  for  lifting  or  lowering  a  load  and moving it
horizontally  which  utilizes  wire  rope  and  in  which  the  hoisting
mechanism is an integral part of the machine.
  CROSS  AISLE. An aisle in a place of assembly usually parallel to rows
of seats, connecting other aisles or an aisle and an exit.
  CROSS-CONNECTION (FIRE EXTINGUISHING SYSTEM).  Piping  between  risers
and siamese connections in a standpipe or sprinkler system.
  CROSS-CONNECTION  (POTABLE  WATER  SYSTEM).  A  physical connection or
arrangement between two otherwise separate piping systems, one of  which
contains  potable  water,  and  the  other  of  which  contains water of
questionable safety, or steam, gases, or chemicals whereby there can  be
a flow from one system to another.
  CURB  LEVEL.  The  legally established level on the curb in front of a
building, measured at the center of such front. When a building faces on
more than one street, curb level shall mean the average of  the  legally
established levels of the curbs at the center of each front.
  CURB  LINE.  The  line  coincident  with  the  face of the street curb
adjacent to the roadway.
  DATUM. (See section 27-158 of subchapter one of this chapter.)
  DEAD END. A portion of a corridor in which the travel to an exit is in
one direction only.
  DEAD LOAD. Materials, equipment, constructions, or other  elements  of
weight  supported  in, on, or by the building (including its own weight)
that are intended to remain permanently in place.
  DECIBEL. A unit of measurement of the loudness of sound. A division of
a logarithmic scale for expressing the ratio of two amounts of power  or
energy.  The  number  of decibels denoting such a ratio is ten times the
logarithm of the ratio.
  DELUGE SPRINKLER SYSTEM. An open head sprinkler system  without  water
in  the  system piping, with the water supply controlled by an automatic
valve operated by smoke or heat-responsive devices installed  throughout
the sprinklered area, and independent of the sprinkler heads.
  DEMOLITION.  The  dismantling  or razing of all or part of a building,
including all operations incidental thereto.
  DEPARTMENT. The department of buildings of the city of New York.
  DERRICK. An apparatus consisting of a mast or equipment  members  held
at  the  top  by  guys or braces, with or without a boom, for use with a
hoisting mechanism and operating ropes, for lifting or lowering  a  load
and moving it horizontally.

  DRAINAGE  SYSTEM.  All  the  piping within public or private premises,
which conveys sewage, rain water, or other  liquid  wastes  to  a  legal
point  of  disposal,  but  shall  not  include the mains of public sewer
system or private or public sewage-treatment or disposal plant.
  DRAFT  CURTAIN.  A  noncombustible  curtain  suspended  in  a vertical
position from a  ceiling  for  the  purpose  of  retarding  the  lateral
movement  of heated air, gases, and smoke along the ceiling in the event
of fire.
  DRAFT HOOD. A device placed in  and  made  part  of  a  chimney,  vent
connector,  or  combustion  equipment, to (1) insure the ready escape of
the products of combustion in the event  of  no  draft,  back-draft,  or
stoppage  beyond  the draft hood, (2) prevent a back-draft from entering
the equipment, or (3) neutralize the effect of excessive stack action of
the chimney flue upon the operation of the equipment.
  DRY PIPE VALVE. A valve that automatically controls the  water  supply
to  a  sprinkler  system so that the system beyond the valve is normally
maintained dry.
  DUCT (VENTILATION). A pipe, tube, conduit, or an enclosed space within
a wall or structure, used for conveying air.
  DUMBWAITER. A hoisting and lowering mechanism equipped with a car that
moves in guides in a substantially vertical direction, the floor area of
which does not exceed  nine  square  feet,  whose  total  inside  height
whether  or  not  provided with fixed or movable shelves does not exceed
four feet, the capacity of which does not exceed  five  hundred  pounds,
and that is used exclusively for carrying materials.
  DWELLING.  Any  building occupied in whole or in part as the temporary
or permanent home or residence of one or more families.
  DWELLING UNIT. One or more rooms in a dwelling or  building  that  are
arranged, designed, used or intended for use by one or more families.
  ELECTRICALLY  SUPERVISED.  As applied to a control circuit, shall mean
that in the event of interruption of the current supply or in the  event
of a break in the circuit, a specific signal will be given.
  ELEVATOR.  A  hoisting  and  lowering mechanism equipped with a car or
platform that moves in guides in a substantially vertical direction, and
that serves two or more floors of a building.
  ELEVATOR VESTIBULE. A room or space enclosed with noncombustible smoke
barrier partitions with smoke stop doors conforming to  subdivision  (c)
of  section  27-371.  Except  for  such  smoke  stop  doors, openings to
elevators and to exits shall be the only other door  openings  permitted
in the enclosing partitions.
  EMERGENCY  INTERLOCK  RELEASE SWITCH. As applied to an elevator, shall
mean a device to make inoperative, in case of emergency,  door  or  gate
electric contacts or door interlocks.
  ENGINEER.  A person licensed to practice the profession of engineering
under the education law of the state of New York.
  EQUIVALENT UNIFORM  LOAD.  A  conventionalized  representation  of  an
element of dead or live load, used for the purposes of design in lieu of
the actual dead or live load.
  ESCALATOR.  A  power  driven,  inclined,  continuous stairway used for
raising or lowering passengers.
  EXISTING BUILDING. A building, whether high rise or low rise:
  (1) Which on April first, nineteen hundred eighty-four is complete  or
under construction, or
  (2) For which an application for approval of plans has been filed with
the  department prior to October first, nineteen hundred eighty-four and
construction  commenced  prior  to   April   first,   nineteen   hundred
eighty-six,  provided that those requirements of this code applicable to
existing buildings  classified  in  the  same  occupancy  group  as  the

proposed  building  shall  be  complied with in accordance with the time
limitations set forth in this code.
  EXISTING  HIGH  RISE  BUILDING.  A building, classified as a high rise
structure:
  (1) Which on April first, nineteen hundred eighty-four is complete  or
under construction, or
  (2) For which an application for approval of plans has been filed with
the  department prior to October first, nineteen hundred eighty-four and
construction  commenced  prior  to   April   first,   nineteen   hundred
eighty-six,  provided that those requirements of this code applicable to
existing buildings  classified  in  the  same  occupancy  group  as  the
proposed  building  shall  be  complied with in accordance with the time
limitations set forth in this code.
  (1) EXISTING OFFICE BUILDING, ONE HUNDRED FEET OR MORE IN  HEIGHT.  An
office  building  one  hundred  feet  or  more  in  height or a building
classified in occupancy group E, one hundred feet or more in height:
  (1) which on January eighteenth,  nineteen  hundred  seventy-three  is
complete or under construction, or
  (2)  for  which  plans  have  been  filed  before  January eighteenth,
nineteen hundred seventy-three and construction commenced on  or  before
January eighteenth, nineteen hundred seventy-four, or
  (3)  for  which  plans  are  filed  on  or  before January eighteenth,
nineteen hundred seventy-four and construction commenced  on  or  before
January  eighteenth,  nineteen hundred seventy-five and further provided
that all the requirements for such existing office buildings  are  fully
complied with in the course of construction and before completion.
  EXIT.  A  means  of  egress from the interior of a building to an open
exterior space which is provided by the use  of  the  following,  either
singly  or  in combination: exterior door openings, vertical exits, exit
passageways, horizontal exits, interior stairs,  exterior  stairs,  fire
towers  or  fire  escapes;  but  not  including  access  stairs, aisles,
corridor doors or corridors.
  EXIT PASSAGEWAY. A horizontal extension  of  a  vertical  exit,  or  a
passage leading from a yard or court to an open exterior space.
  EXTERIOR  SEPARATION.  The  shortest  distance  across an unobstructed
outdoor space measured from the furthest projection of the exterior wall
of a building to an interior lot line or to a line halfway  between  the
wall  and  that  of  any  other  building  on  the  same  lot, or to the
centerline of an adjacent street or other public space.
  EXTERIOR STAIR. A stair open to the outdoor  air,  that  serves  as  a
required exit. (See ACCESS STAIR and INTERIOR STAIR.)
  FACING.  As  applied  to  a  sign, shall mean the surface of the sign,
upon, against or through which the message of the sign is exhibited.
  FAMILY. A single individual; or two or  more  individuals  related  by
blood  or  marriage  or  who  are parties to a domestic partnership, and
living together and maintaining a common household, with not  more  than
four  boarders,  roomers  or  lodgers;  or a group of not more than four
individuals, not necessarily related by blood, marriage or because  they
are  parties  to  a  domestic  partnership,  and  maintaining  a  common
household.
  FIRE ALARM. A system, automatic or manual, arranged to give  a  signal
indicating a fire emergency.
  FIRE  AREA.  A  floor  area enclosed by fire divisions and/or exterior
walls.
  FIRE CANOPY. A  solid  horizontal  projection,  extending  beyond  the
exterior  face  of a building wall, located over a wall opening so as to
retard the spread of fire through openings from one story to another.

  FIRE  DISTRICTS.  The  geographical  territories   established   under
subchapter  four  of this chapter for the regulation of occupancy groups
and construction classes within such districts.
  FIRE  DIVISION.  Any  construction, vertical, horizontal or otherwise,
having the required  fire-resistance  rating  and  structural  stability
under  fire  conditions  to  provide  a  fire  barrier between adjoining
buildings or between adjoining or superimposed fire  areas  or  building
sections within the same building.
  FIRE  DOOR.  An  opening  protective  in  the  form  of a door and its
assembly.
  FIRE PROTECTION PLAN. A report containing a narrative  description  of
the  life and fire safety systems and evacuation system for a structure,
in accordance with section 27-228.2 of this title.
  FIRE-PROTECTION RATING. The time in hours or fractions thereof that an
opening protective and its assembly  will  withstand  fire  exposure  as
determined by a fire test made in conformity with specified standards of
subchapter five of this chapter.
  FIRE-RESISTANCE  RATING.  The  time in hours or fractions thereof that
materials or their assemblies will withstand fire exposure as determined
by a  fire  test  made  in  conformity  with  a  specified  standard  of
subchapter five of this chapter.
  FIRE  RETARDANT  TREATED WOOD. Wood that has been pressure impregnated
with chemicals so as to reduce its combustibility.
  FIRE SAFETY PLAN. A description  of  the  fire  drill  and  evacuation
procedures for a structure which is required to be submitted to the fire
department in accordance with the requirements of section 27-4267 of the
administrative code and the regulations of the fire commissioner.
  FIRE  SECTION.  A sprinklered area within a building that is separated
from other areas  by  noncombustible  construction  having  at  least  a
two-hour fire-resistance rating.
  FIRE SEPARATION. Any construction, vertical, horizontal, or otherwise,
having  the  required  fire-resistance  rating to provide a fire barrier
between adjoining rooms or spaces within a building,  building  section,
or fire area.
  FIRESTOP.  A  solid  or compact, tight closure to retard the spread of
flames or hot gases within concealed spaces.
  FIRE SUPPRESSION PIPING SYSTEM.  Any  system  including  any  and  all
equipment  and materials in connection therewith the purpose of which is
to control, to contain, to suppress or to extinguish fire.
  FIRE WALL. A fire division in the form of a wall.
  FIRE WINDOW. An opening protective in the form of  a  window  and  its
assembly.
  FLAME  SPREAD  RATING.  The  measurement  of  the  comparative rate of
propagation of flame over the surface of a material as determined  by  a
fire  test  made  in  accordance with a specified standard in subchapter
five of this chapter.
  FLAMMABLE. Capable of being easily ignited when exposed to flame,  and
which burns intensely, or has a rapid rate of flamespread.
  FLASH  POINT.  The  lowest  temperature  at  which  a liquid gives off
sufficient vapor to form an ignitable mixture with air near the  surface
of the liquid or within the vessel used.
  FLOOR AREA. The projected horizontal area inside of walls, partitions,
or other enclosing construction.
  FLOOR AREA (NET). When used to determine the occupant load of a space,
shall  mean  the  horizontal occupiable area within the space, excluding
the thickness of walls, and partitions, columns, furred-in spaces, fixed
cabinets, equipment, and accessory spaces such as closets,  machine  and

equipment  rooms,  toilets,  stairs,  halls,  corridors,  elevators  and
similar unoccupied spaces.
  FLUE.  An  enclosed  passageway  in  a  chimney  to  carry products of
combustion to the outer air.
  FOLDED PLATE. An assembly consisting of one or more units,  each  unit
of  which  is formed by two or more individually planar elements, termed
plates, intersecting at angles.
  FOOTING. A foundation  element  consisting  of  an  enlargement  of  a
foundation pier or foundation wall, wherein the soil materials along the
sides  of  and underlying the element may be visually inspected prior to
and during its construction.
  FOUNDATION (BUILDING). A construction that transfers building loads to
the supporting soil.
  FOUNDATION PIER. A foundation element consisting of a column  embedded
into  the  soil  below  the lowest floor to the top of a footing or pile
cap. Where a pier  bears  directly  on  the  soil  without  intermediate
footings  or pile caps, the entire length of the column below the lowest
floor level shall be considered as a foundation pier.  Foundation  piers
shall  be limited to piers so constructed that the entire surface of the
sides of the pier and the bearing material under the lower  end  of  the
pier  can  be  visually  inspected  prior to or during construction, but
which will be concealed in the final work. Piers below the lowest  floor
or  basement  level  that  will be exposed and open to inspection in the
final work shall be considered as columns. Types of construction wherein
the sides cannot be visually inspected shall be considered as piling.
  FOUNDATION WALL. A wall extending below grade.
  FRAMEWORK. As applied to a sign, shall mean the supports, uprights and
bracing of the sign.
  FRESH AIR. Outdoor air.
  FRONT. As applied to building  location  on  a  lot,  shall  mean  the
distance  between  lines  drawn  through  the  most remote points of the
building perimeter, projected at right angles to a frontage space.
  FRONTAGE SPACE. A street; or an open space outside of a building,  not
less than thirty feet in any dimension, that is accessible from a street
by a driveway, lane, or alley at least twenty feet in width, and that is
permanently  maintained  free  of  all obstructions that might interfere
with its use by the fire department.
  FRONT YARD. A yard extending along the full length of a street line.
  GAS DISTRIBUTION PIPING. All piping from the house  side  of  the  gas
meter  piping  that  distributes gas supplied by a public utility to all
fixtures and apparatus used for illumination or fuel in any building.
  GAS METER PIPING. The piping from the gas service line  valve  to  the
outlet  of  the  meter-regulator  set  or  the  meter if no regulator is
required.
  GAS  PIPING  SYSTEMS.  The  gas  service  piping,  meter  piping   and
distribution piping.
  GAS  SERVICE  LINE  VALVE.  The valve located at or below grade on the
supply side of the meter or service regulator, if a service regulator is
required. If a plug type valve is used it shall be constructed so as  to
prevent  the  core  from  being blown out by the pressure of the gas. In
addition, it shall be of a type capable  of  being  locked  in  the  off
position by the local gas utility.
  GAS  SERVICE  PIPING. The supply piping from the street main up to and
including the gas service line valve.
  GRADE. The finished surface of the ground, either paved or unpaved.
  GRADE BEAM. A  beam,  at,  near,  or  below  grade,  spanning  between
footings,  pile  caps or foundation piers, and supporting walls or other
elements of a building.

  GRANDSTAND. A structure used to support spectators, either standing or
seated, usually outdoors.
  GROUND  SIGN.  A  sign  supported by uprights or braces in or upon the
surface of the ground.
  GROUP HOME. A facility for the care and maintenance of not  less  than
seven  nor  more  than twelve children, operated pursuant to subdivision
(c) of section three hundred seventy-four of the social services law, or
other provisions of applicable laws, and  supervised  by  the  New  York
state board of social welfare.
  HABITABLE  ROOM.  A  residential  room  or  space,  having the minimum
dimensions required by section  27-751  of  article  six  of  subchapter
twelve  of this chapter in which the ordinary functions of domestic life
are carried on, and which  includes  bedrooms,  living  rooms,  studies,
recreation  rooms,  kitchens, dining rooms and other similar spaces, but
does not include closets, halls, stairs, laundry rooms, or bathrooms.
  HEIGHT (BUILDINGS). The vertical distance from the curb level  to  the
highest point of the roof beams in the case of flat roofs, or to a point
at  the  average height of the gable in the case of roofs having a pitch
of more than one foot in four and one-half feet; except that  where  the
curb  level has not been legally established, or where every part of the
building is set back more than twenty-five feet from a street line,  the
height shall be measured from the adjoining grade elevation.
  HEREAFTER. On or after the effective date of this code.
  HERETOFORE. Before the effective date of this code.
  HIGH RISE. A structure seventy-five feet or more in height.
  HOISTWAY.  An enclosed or partly enclosed shaft used for the travel of
an elevator, dumbwaiter, platform or bucket.
  HOISTWAY DOOR. As applied to an elevator, shall  mean  the  hinged  or
sliding  portion of a hoistway enclosure which closes the opening giving
access to a landing.
  HOISTWAY DOOR INTERLOCK. A device used to prevent the operation of the
driving machine of an elevator by the normal operating device unless the
hoistway door is locked in the closed position, and also used to prevent
the opening of the hoistway door from the landing side unless the car is
within the landing zone and is either stopped or being stopped.
  HOISTING MACHINE.  A  power  operated  machine  used  for  lifting  or
lowering  a  load  utilizing  a drum and wire rope, excluding elevators.
This shall include but not be limited to a crane, derrick and cableway.
  HORIZONTAL EXIT. (See Section 27-373 of article five of subchapter six
of this chapter.)
  ILLUMINATED SIGN. A sign designed or arranged to give forth or reflect
light from an attached artificial source.
  IMPACT LOAD. A kinetic load of short duration such as  that  resulting
from moving machinery, elevators, craneways, vehicles, etc.
  INDEPENDENT  POLE  SCAFFOLD.  A scaffold supported by multiple rows of
uprights, and not depending on the building for support.
  INDIRECT WASTE PIPE. A drain pipe used to convey liquid  wastes  which
does not connect directly with the drainage system, but which discharges
into  the  house  drainage  system  through  an  air  break into a trap,
fixture, receptacle, or interceptor.
  INDUSTRIAL LIFT. A hoisting and lowering mechanism  of  a  nonportable
power-operated   type  for  raising  or  lowering  material  vertically,
operating entirely within one story of a building.
  INDUSTRIAL  WASTE.  Liquid,  gaseous  or  solid   substances,   or   a
combination   thereof,   resulting   from   any   process  of  industry,
manufacturing, trade or business, or from the development or recovery of
any natural resource.

  INNER COURT. Any open area, other than a yard or portion thereof, that
is unobstructed from its lowest level to the sky and that is bounded  by
either building walls, or building walls and one or more lot lines other
than a street line or building walls, except for one opening on any open
area  along  an  interior  lot line that has a width of less than thirty
feet at any point.
  INTERIOR LOT LINE. A lot line other than a street line.
  INTERIOR STAIR. A stair within a building, that serves as  a  required
exit. (See ACCESS STAIR and EXTERIOR STAIR.)
  LAGGING  (PILE).  Pieces  of  timber or other material attached to the
sides of piles to increase resistance to penetration through soil.
  LAMELLA. Shell construction in which the shell is formed by a  lattice
of interlacing members.
  LANDING DOOR. (See HOISTWAY DOOR.)
  LEADER.  A  vertical drainage pipe for conveying storm water from roof
or gutter drains to a building house storm drain, building  house  drain
(combined),  or  other  means  of disposal. The leader shall include the
horizontal pipe to a single roof drain or gutter drain.
  LESSEE. The person in possession of a building under a lease from  the
owner thereof.
  LICENSE.  A  written document issued by the commissioner authorizing a
person  to  perform  specific  acts  in  or  in  connection   with   the
construction   or   alteration   of   buildings,  or  the  installation,
alteration, and use and operation of service equipment therein.
  LIVE LOAD. All occupants, materials, equipment, constructions or other
elements of weight supported in, on or by a building that  will  or  are
likely  to  be  moved  or  relocated  during  the  expected  life of the
building.
  LOAD-BEARING. (See BEARING.)
  LOADING RAMP. A hinged, mechanically operated lifting device used  for
spanning  gaps  and/or  adjusting  heights  between loading surfaces, or
between loading surfaces and carriers.
  LODGER. (See BOARDER.)
  LOT. A portion or parcel of land considered as a unit. A zoning lot.
  LOT LINE. A line dividing one land unit from another, or from a street
or other public space. A boundary line of a zoning lot.
  LOW RISE. A structure less than seventy-five feet in height.
  MALL. An enclosed or roofed area  used  as  a  pedestrian  circulation
space  and  connecting no more than three stories or portions of stories
of a building or buildings housing single and/or multiple tenants.
  MANUAL FIRE PUMP. A pump that feeds water into  a  fire  extinguishing
system  that must be started by either the building personnel or members
of the fire department.
  MARQUEE SIGN. A sign placed flat against the front or side fascia of a
marquee.
  MECHANICAL VENTILATION. The process of introducing outdoor  air  into,
or  removing  vitiated  air  from  a  building  by  mechanical  means. A
mechanical ventilating system may include air heating, air  cooling,  or
air conditioning components.
  MECHANIZED  PARKING  GARAGE  EQUIPMENT.  Special devices in mechanical
parking garages that operate in either stationary or  horizontal  moving
hoistways, that are exclusively for the conveying of automobiles, and in
which  no  persons  are  normally  stationed on any level other than the
receiving level and in which each automobile during the parking  process
is  moved  by  means  of  a power driven transfer device, on and off the
elevator directly into parking spaces or cubicles.
  MEZZANINE. An intermediate floor between the floor and ceiling of  any
space.  When  the  total gross floor area of all mezzanines occurring in

any story exceeds thirty-three and one-third percent of the gross  floor
area  of  that  story  such  mezzanine shall be considered as a separate
story.
  MINOR  ALTERATIONS.  (See Section 27-124 of article five of subchapter
one of this chapter.)
  MORTAR (GROUT). A mixture of cementitious  materials,  fine-aggregates
and water.
  MOTOR VEHICLE. A conveyance propelled by an internal combustion engine
and having a fuel storage tank capacity of more than two gallons.
  MOVING  WALK.  A  passenger-carrying  device on which persons stand or
walk, and in which the passenger-carrying surface  remains  parallel  to
its direction of motion and is uninterrupted.
  MULTIPLE DWELLING. A building containing three or more dwelling units.
Multiple  dwelling  shall  not  be deemed to include a hospital, school,
convent, monastery, asylum or other public institution.
  NONAUTOMATIC SPRINKLER SYSTEM. A sprinkler system in which  all  pipes
and  sprinkler heads are maintained dry and which is supplied with water
through a fire department siamese connection.
  NONAUTOMATIC STANDPIPE SYSTEM. A standpipe system in which all  piping
is  maintained  dry,  and  which  is  supplied with water through a fire
department siamese connection.
  NONBEARING. As applied to a wall or partition,  shall  mean  one  that
supports no vertical load other than its own weight.
  NONCOMBUSTIBLE.  A  material which, in the form in which it is used in
construction, will not ignite and burn when subjected to fire.  However,
any   material   which  liberates  flammable  gas  when  heated  to  any
temperature up to one thousand three hundred eighty  degrees  Fahrenheit
for  five  minutes  shall  not be considered noncombustible. No material
shall be considered noncombustible  which  is  subject  to  increase  in
combustibility  beyond the limits established above, through the effects
of age, fabrication or erection techniques, moisture, or other  interior
or exterior atmospheric conditions.
  NONCURRENT LOADS. Two or more elements of dead or live load which, for
purposes of design, are considered not to act simultaneously.
  NONLOADBEARING. (See NONBEARING.)
  OCCUPANCY.  The  purpose  or activity for which a building or space is
used or is designed or intended to be used.
  OCCUPANCY GROUP.  The  category  in  which  a  building  or  space  is
classified  by the provisions of subchapter three of this chapter, based
on its occupancy or use.
  OCCUPANT LOAD. The number of occupants of a space, floor  or  building
for whom exit facilities shall be provided.
  OCCUPIABLE ROOM. A room or space, other than a habitable room designed
for  human occupancy or use, in which persons may remain for a period of
time for rest, amusement, treatment,  education,  dining,  shopping,  or
other similar purposes, or in which occupants are engaged at work.
  OCTAVE. The interval between two sounds having a basic frequency ratio
of  two.  By  extension,  the  octave  is  the intervale between any two
frequencies having the ratio 2:1. The standard octave bands are:

                             FREQUENCY (CPS)
  Mid-Frequency   63   125   250   500   1000   2000   4000     8000
  Approximate
  Lower           45    90   180   355   710    1400   2800     5600
  Frequency
  Limits Upper    90   180   355   710   1400   2800   5600    11200

  OFFICE BUILDING. A building constructed pursuant to the code in effect
prior to December 6, 1968 in which the main use or dominant occupancy is
offices or a building classified in occupancy group E.
  OIL  BUFFER.  As applied to an elevator, shall mean a buffer using oil
as a medium which  absorbs  and  dissipates  the  kinetic  energy  of  a
descending car or counterweight.
  OPEN EXTERIOR SPACE. A street or other public space; or a yard, court,
or  plaza  open  on one or more sides and unroofed or open on all sides,
which provides egress to a street or public space.
  OPEN PARKING LOT. A lot, or portion thereof, used for the  storage  or
sale  of  more  than four motor vehicles, but not used for the repair or
servicing of such vehicles.
  OPEN PARKING STRUCTURE. A structure open to the outdoors fifty percent
or more on two or more sides of each story,  used  for  the  parking  of
motor vehicles.
  OPEN SHAFT. A shaft open to the outdoor air at the top.
  OPENING   PROTECTIVE.   An  assembly  of  materials  and  accessories,
including frames and  hardware  installed  in  an  opening  in  a  wall,
partition,  floor,  ceiling  or  roof  to prevent, resist, or retard the
passage of flame, smoke or hot gases.
  ORDINARY REPAIRS. (See section 27-125 of this chapter.)
  OUTER COURT. Any open area, other than a yard or portion thereof, that
is unobstructed from its lowest level to the sky and that, except for an
outer court opening upon a street line, a front yard, or a rear yard, is
bounded by either building walls or building walls and one or  more  lot
lines other than a street line.
  OUTRIGGER  SCAFFOLD.  A  scaffold, the platform of which is built upon
supports cantilevering beyond the walls of the building.
  OUTSIDE GAS SERVICE LINE VALVE. The valve located on the  gas  service
piping which can be either exposed or buried.
  OWNER.  A person having legal title to premises; a mortgagee or vendee
in possession; a trustee in bankruptcy; a receiver or any  other  person
having legal ownership or control of premises.
  PARAPET.  The  continuation  of  an exterior wall, fire wall, or party
wall above the roof line.
  PARKING TIER. A general level of parking.
  PARTITION. A vertical unit or assembly of materials that separates one
space from another within any story of a building.
  PARTY WALL. A fire division on an interior  lot  line  common  to  two
adjoining buildings.
  PENTHOUSE. An enclosed structure on or above the roof of any part of a
building,  which  is designed or used for human occupancy. (See BULKHEAD
and ROOF STRUCTURE.)
  PERMIT. A written document issued by the commissioner authorizing  the
construction   or  alteration  or  demolition  of  a  building,  or  the
installation, alteration or  use  and  operation  of  service  equipment
therein.
  PERSON.  An  individual,  partnership,  corporation,  or  other  legal
entity.
  PHYSICAL DISABILITY.--Any of the following:
  (a) impairment requiring use of a wheelchair; or
  (b) impairment causing difficulty or insecurity in walking or climbing
stairs or requiring the use of  braces,  crutches  or  other  artificial
supports;   or  impairment  caused  by  amputation,  arthritis,  spastic
condition or pulmonary, cardiac or other ills rendering  the  individual
semi-ambulatory; or
  (c) total or partial impairment of hearing or sight causing insecurity
or likelihood of exposure to danger in public places; or

  (d) impairment due to conditions of aging and incoordination.
The  term  "physical  handicap"  shall have the same meaning as the term
"physical  disability"  and   the   phrase   "people   having   physical
disabilities"   shall   include   those  having  one  or  more  physical
disabilities.
  PILE. A structural element introduced  into  the  ground  to  transmit
loads  to  lower  strata  and  of  such  construction  that the material
underlying the base of the unit or along the sides  cannot  be  visually
inspected.
  PILE CAR. A construction encasing the heads of one or more piles which
transfers loads to the pile or piles.
  PLACE  OF ASSEMBLY. An enclosed room or space in which seventy-five or
more persons gather for religious, recreational, educational,  political
or  social  purposes,  or  for  the consumption of food or drink, or for
similar group activities or which is designed for use by seventy-five or
more persons gathered for any of the above reasons, but  excluding  such
spaces  in  dwelling  units; or an outdoor space in which two hundred or
more persons gather for any of the above reasons or  which  is  designed
for  use  by  two  hundred or more persons gathered for any of the above
reasons.
  PLASTIC. A material  that  contains  as  an  essential  ingredient  an
organic  substance  of  large molecular weight, is solid in its finished
state and, at some stage in  its  manufacture  or  its  processing  into
finished articles, can be shaped by flow.
  PLASTIC,  SLOW  BURNING.  A plastic having a rate of combustion within
the limits of a specified standard of subchapter five of this chapter.
  PLATFORM FRAME. Light timber construction in which the exterior  walls
and  bearing  walls  consist of studs which are interrupted at floors by
the entire thickness of the floor construction.
  PLUMBING.  The  practice,  materials,  and  fixtures   used   in   the
installation,  maintenance,  extension,  and  alteration  of all piping,
fixtures, appliances, equipment, and appurtenances  in  connection  with
any  of  the  following: sanitary drainage or storm drainage facilities,
the venting system and the  public  or  private  water  supply  systems,
within or adjacent to any building; also the practice and materials used
in  the  installation,  maintenance,  extension,  or alteration of storm
water, liquid-waste,  or  sewerage,  and  water-supply  systems  of  any
premises and their connection with any point of public disposal or other
acceptable terminal.
  PLUMBING  FIXTURES. Installed receptacles, devices, or appliances that
are supplied with  water  or  which  receive  or  discharge  liquids  or
liquid-borne wastes.
  PLUMBING  SYSTEM.  The  water-supply  and distribution pipes; plumbing
fixtures and traps; soil, waste, and vent pipes; building  house  drains
and  building  house  sewers  including  their  respective  connections,
devices, and appurtenances within the property lines  of  the  premises;
and water-treating or water-using equipment.
  POLE  FOOTING.  A type of construction in which a pole embedded in the
ground and extending upward to form a column is used for both column and
footing.
  PONDING. The collection of rainwater.
  POTABLE  WATER.  Water  free  from  impurities  present   in   amounts
sufficient  to  cause  disease  or  harmful  physiological  effects. Its
bacteriological and chemical quality shall conform to  the  requirements
of the department of health and mental hygiene.
  POWER-OPERATED  SCAFFOLD.  Any  form  of  scaffold  that  is propelled
vertically by the use of power machinery.
  PREMISES. Land, improvements thereon, or any part thereof.

  PRIMARY  ENTRANCE(S).--The  principal  entrance(s)   to   a   building
primarily  and  expressly utilized for day-to-day pedestrian ingress and
egress.  Side, rear and other entrances  solely  used  for  freight  and
service shall not constitute a primary entrance.
  PRIVATE  GARAGE.  A building or enclosed space used for the parking or
storage of not more than four motor vehicles having fuel  storage  tanks
of  twenty-six  gallon  capacity  or  less, and in which no repair, body
work, or painting of vehicles is conducted, and in  which  no  gasoline,
oil, or similar products are dispensed.
  PRIVATE  SEWER.  A  sewer  privately  owned  and  controlled by public
authority only to the extent provided by law.
  PROJECTING SIGN. A sign affixed to an exterior wall of a building  and
extending more than fifteen inches beyond the wall surface.
  PUBLIC AREAS. Area(s) within a building usually open to or used by the
general  public,  such  as  lobbies, corridors, waiting rooms, reception
rooms, rest rooms, etc.
  PUBLIC GARAGE. A building or space used for the parking or storage  of
motor  vehicles,  other  than  an automotive service station, automotive
repair shop, open parking structure, or private  garage.  Truck  loading
and shipping areas shall be classified as public garages.
  PUBLIC SEWER. A sewer entirely controlled by public authority.
  PUBLIC  SPACE. An open space outside of a building, which is dedicated
or devoted to public use by  lawful  mapping  or  by  any  other  lawful
procedure.
  PURE TONE. A soundwave of a single frequency, so called to distinguish
it from a complex tone.
  REAR LOT LINE. Any lot line, except a street line, that is parallel or
within  forty-five  degrees of being parallel to, and does not intersect
any street line bounding such lot.
  REAR YARD. A yard extending for the full length of a rear lot line.
  REBOUND. Recovery of displacement  due  to  release  or  reduction  of
applied load.
  REFRIGERATION.  The process by which heat is absorbed from a substance
by expansion or vaporization of a refrigerant.
  REQUIRED. Shall mean required by the provisions of this code.
  RETAINING WALL. A wall designed to prevent the lateral displacement of
soil or other materials.
  RIGGING LOFT. A space above a stage, designed and used for the  flying
and  storage  of  scenery  and  scenic  elements.  A  space used for the
occasional flying of incidental props during a performance shall not  be
deemed to constitute a rigging loft.
  ROOF.  The topmost slab or deck of a building, either flat or sloping,
with its supporting members, not including vertical supports.
  ROOF COVERING. The covering applied to the exterior surface of a  roof
for  weather  resistance,  fire resistance, wear, and/or appearance, but
not including insulation.
  ROOF SIGN. A sign erected and maintained on or above  the  roof  of  a
building.
  ROOF  STRUCTURE.  An  unenclosed structure on or above the roof of any
part of a building. (See BULKHEAD and PENTHOUSE.)
  ROOMER. (See BOARDER.)
  SAFE AREA. An interior or exterior space that serves  as  a  means  of
egress  by providing a transitional area from, and that also serves as a
normal means of entry to, an assembly space.
  SAFETY (CAR OR COUNTERWEIGHT). A  mechanical  device  attached  to  an
elevator  car  frame  or  to an auxiliary frame, or to the counterweight
frame,  to  stop  and  hold  the  car  or  counterweight  in   case   of
predetermined overspeed or free fall, or if the hoisting ropes slacken.

  SCENERY  AND  SCENIC  ELEMENTS. Any or all of those devices ordinarily
used on a stage in the presentation of a theatrical performance, such as
back drops, side tabs, teasers,  borders  or  scrim,  rigid  flats,  set
pieces, and all properties, but not including costumes.
  SCHOOL.  An  elementary school, high school, or college, either public
or private.
  SEATING SECTION. An area of seating bounded on all  sides  by  aisles,
cross aisles, walls or partitions.
  SELF-CLOSING.  As  applied to an opening protective shall mean a door,
window, damper, or other device, and its assembly that is normally  kept
in  a  closed  position  and that is equipped with an approved device to
insure immediate closing after having been opened for use.
  SELF-RELIEVING CONSTRUCTION. Construction using a type of  framing  in
which  the  connections are capable of developing a known and dependable
moment capacity but which, under larger moments, are capable of rotating
(without fracture) an amount sufficient to  accommodate  the  deflection
due to the excess of the applied moment over the moment capacity.
  SERVICE  EQUIPMENT. Equipment, including all components thereof, which
provides  sanitation,  power,   light,   heat,   cooling,   ventilation,
air-conditioning,  refuse  disposal,  fire-fighting,  transportation, or
similar facility for a building which by design becomes a  part  of  the
building, and which is regulated by the provisions of this code.
  SEWAGE.  Any  liquid  waste  containing  animal or vegetable matter in
suspension or solution, and may include liquids containing chemicals  in
solution.
  SEWAGE  DISPOSAL  SYSTEM. A system for the disposal of sewage by means
of a septic tank, cesspool, or mechanical treatment,  all  designed  for
use apart from a public sewer to serve a single establishment, building,
or development.
  SEWAGE EJECTOR. A mechanical device used to pump or eject sewage.
  SHAFT.   A   vertical,  inclined,  or  offset  passage,  or  hoistway,
penetrating through two or more floors of a building or through a  floor
and roof.  (See CLOSED SHAFT and OPEN SHAFT.)
  SHALL. As used in this code, is always to be construed as mandatory.
  SHELL.  A  structure  consisting  of  a  curved  or  folded slab whose
thickness is small compared  to  its  other  dimensions,  and  which  is
characterized  by its three dimensional load-carrying behavior. The term
shall  include  those  forms  of  construction  that  approximate   slab
surfaces, such as lamellas and lattices.
  SIAMESE CONNECTION. A fitting connected to a fire extinguishing system
and installed on the outside of a building, with two hose inlets for use
of the fire department, to furnish or supplement the water supply to the
system.
  SIDE  LOT  LINE.  Any lot line that is not a street line or a rear lot
line.
  SIDEWALK ELEVATOR. A freight elevator that operates between a sidewalk
or other area outside of a building and floor levels inside the building
below such area, which has no landing opening into the building  at  its
upper limit of travel, and which is not used to carry automobiles.
  SIDE  YARD.  A  yard extending along a side lot line from the required
front yard (or from the street line if no front yard is required) to the
required rear yard (or  to  the  rear  lot  line  if  no  rear  yard  is
required).
  SIDEWALK  SHED. A construction over a public sidewalk, used to protect
pedestrians from falling objects.
  SIGN. An outdoor structure, banner or other device, designed  or  used
as  an  advertisement, or announcement for the information or attraction
of the public; consisting of  the  framework  and  all  letters,  words,

numerals,   illustrations,   illumination,   decorations,  trade  marks,
emblems, symbols or other figures or characters.
  SINGLE POLE SCAFFOLD. A platform resting on putlogs or crossbeams, the
outer  ends of which are supported on ledgers secured to a single row of
posts or uprights, and the inner ends of which are supported by a wall.
  SMOKE BARRIER. Any continuous non-combustible construction,  vertical,
horizontal,  or  otherwise,  such as a wall, floor, or ceiling assembly,
that is designed and constructed to restrict the  spread  of  smoke  and
constructed  in  accordance  with  the provisions of section 27-353.3 of
this code.
  SMOKE-STOP DOOR. A door or set  of  doors  placed  in  a  corridor  to
restrict  the  spread  of  smoke  and  to  retard  the spread of fire by
reducing draft.
  SOIL VENT. (See STACK VENT.)
  SOUND POWER. The rate at which sound energy is radiated by a source.
  SOUND POWER LEVEL. The ratio, expressed  in  decibles,  of  the  sound
power of a source to the reference power of ten-thirteen watts.
  SOUND  PRESSURE  LEVEL.  The square ratio, expressed in decibels, of a
sound pressure to a  reference  pressure  of  0.0002  dynes  per  square
centimeter.
  SPANDREL WALL. That portion of an exterior wall between the top of one
opening and the bottom of another in the story directly above.
  SPARK  ARRESTER.  A device to prevent sparks, embers, or other ignited
material above a given size from being expelled to the  atmosphere  from
the top of a chimney.
  SPECIAL WASTE. Wastes that require special treatment before entry into
the normal plumbing system.
  SPRAY  BOOTH.  A  compartment  in which spraying with any substance is
carried on, consisting of at least two sides, a back and a top.
  SPRAYING SPACE OR DIPPING SPACE. Any portion of a  building  in  which
the  actual  work of spraying, dipping, or immersing any article with or
into flammable substances takes place.
  SPRINKLER ALARM. An apparatus constructed and installed so that a flow
of water through the sprinkler system equal to, or  greater  than,  that
required for a single automatic sprinkler head will cause an alarm to be
given.
  SPRINKLER  SYSTEM. A system of piping and sprinkler heads connected to
one or more sources of water supply.
  STACK. (See CHIMNEY.) Also, a general term applying  to  any  vertical
line of soil, waste, vent, or inside leader piping. It shall not include
vertical  fixture  and vent branches that do not extend through the roof
or that pass through not more than two stories before being  reconnected
to the vent stack or stack vent.
  STACK  VENT.  The extension of a soil or waste stack above the highest
horizontal drain connected to a plumbing stack.
  STAGE. An area used in the  presentation  of  a  live  performance  at
anytime and includes the performing area and non-audience areas that are
open  to  the performing area. It may be level or raised with or without
scenic  elements,  and  generally  is  serviced  by  stage  illumination
appliances  and  control  panels.  For  places of assembly classified as
occupancy group F-1A or  F-1B,  the  word  stage  shall  be  defined  in
accordance  with  the definition set forth in sections 27-546 and 27-547
of article three of subchapter eight of this code.
  STAGE LIFT. A movable section of a  stage  floor,  designed  to  carry
scenery  between staging areas and the stage, and also used to be raised
to and temporarily retained at  elevations  above  or  below  the  stage
level.

  STANDPIPE  SYSTEM.  A  system  of  piping, for fire-fighting purposes,
consisting of connections to one or more sources of  water  supply,  and
serving one or more hose outlets.
  STORM DRAIN. (See BUILDING STORM DRAIN.)
  STORM  SEWER.  A  sewer  used for conveying rain water, surface water,
condensate, cooling water, or similar clear liquid wastes which  do  not
contain organic materials or compounds subject to decomposition.
  STORY.  That  portion  of a building that is between a floor level and
the next higher floor level or roof above.
  STREET. A thoroughfare dedicated or devoted to  public  use  by  legal
mapping or other lawful means.
  STREET  FLOOR.  A floor, usually the principal entrance floor, that is
not more than one-half story above or below grade at the  location  from
which egress is provided to the street.
  STREET LINE. A lot line separating a street from other land.
  STREET MAIN. (See WATER MAIN and GAS SERVICE PIPING.)
  STRUCTURE.  An  assembly  of  materials  forming  a  construction  for
occupancy or use, including  among  others:  buildings,  stadia,  tents,
reviewing stands, platforms, stagings, observation towers, radio towers,
tanks, trestles, open sheds, coal pockets, shelters, fences, and display
signs.
  SUBSTRATE.  A surface upon which a finish material is directly applied
and which extends completely behind such finish material.
  SUMP PIT. A tank or pit that receives clear liquid wastes that do  not
contain organic materials or compounds subject to decomposition, located
below the normal grade of the gravity system and that must be emptied by
mechanical means.
  SUMP  PUMP.  A  mechanical device used to pump the liquid waste from a
sump pit into the gravity drainage system.
  SUPPLEMENTAL VERTICAL EXIT.  An  enclosed  stair,  ramp  or  escalator
providing  means  of egress to an area of refuge at another level nearer
to the street floor.
  THIS CODE. The building code.
  TIER OF SEATING. A general level of  seating,  such  as  an  orchestra
(usually the main tier), a balcony, or gallery.
  TRAILER  CAMP. A lot or parcel of land used for temporary or permanent
occupancy by two or more mobile homes or travel trailers.
  TRANSFER COLUMN. A column supported  by  beams,  girders,  trusses  or
similar members and reacting on two or more columns at a lower level.
  UNIFORMLY  DISTRIBUTED  LOAD.  A conventionalized representation of an
element of dead or live load as a load of uniform intensity, distributed
over an area.
  USABLE  DWELLING  UNITS.--Dwelling   units   which   are   accessible,
constructed  and  equipped as set forth in reference standard RS 4-6, so
as  to  be  usable  by  all  categories  of   people   having   physical
disabilities.
  USE  (USED).  The purpose for which a building, structure, or space is
occupied or utilized, unless otherwise indicated by the text. Use (used)
shall be construed  as  if  followed  by  the  words  "or  is  intended,
arranged, or designed to be used."
  VAULT  (SIDEWALK). Any space below the surface of the sidewalk portion
of a street, that is covered over, except those openings that  are  used
exclusively  as  places for descending, by means of steps, to the cellar
or basement of any building.
  VENT(GAS). A flue or duct, used to convey the products  of  combustion
from gas-fired equipment to the outdoor air by natural draft.
  VENT  STACK  (PLUMBING).  A  vertical vent pipe extending through more
than two stories, which  is  then  connected  to  a  stack  vent  or  is

otherwise extended through the roof, installed primarily for the purpose
of  providing  circulation  of  air  to  and from any part of a drainage
system.
  VENT  SYSTEM (COMBUSTION). A gas vent or chimney, together with a vent
connector that forms  a  continuous  unobstructed  passageway  from  gas
burning  equipment  to  the outdoor air for the purpose of removing vent
gases.
  VENT SYSTEM (PLUMBING). A pipe or pipes installed to provide a flow of
air to or from a drainage system or to  provide  a  circulation  of  air
within  such  system  to  protect  trap  seals  from  siphonage and back
pressure.
  VERTICAL EXIT. A stair, ramp, or escalator serving as an exit from one
or more floors above or below the street floor.
  WALL SIGN. A sign affixed to the exterior wall of a building, no  part
of which projects more than fifteen inches from the wall surface.
  WATER-DISTRIBUTION  PIPING.  The  pipes in a building or premises that
convey water from the water service pipe to the  plumbing  fixtures  and
other water outlets.
  WATER  (STREET)  MAIN. A water-supply pipe for public or community use
controlled by public authority.
  WATER-SERVICE PIPE. The pipe from the water  (street)  main  or  other
source of water supply to the building served.
  WATER  SUPPLY  SYSTEM.  The water-service pipe, the water-distribution
piping, and all of the necessary  connecting  pipes,  fittings,  control
valves, and appurtenances used for conveying water in a plumbing system.
  WET STANDPIPE SYSTEM. A standpipe system in which all of the piping is
filled  with  water  under pressure, that is immediately discharged upon
the opening of any hose valve.
  WINDING-DRUM MACHINE. As applied to an elevator, shall mean  a  geared
-drive machine in which the hoisting ropes are fastened to and wind on a
drum.
  WORKERS'  HOIST. A hoisting and lowering mechanism equipped with a car
that moves in guides in a substantially vertical direction and  that  is
used primarily for raising and lowering workers to the working levels.
  WRITING (WRITTEN). The term shall be construed to include handwriting,
typewriting,  printing,  photo-offset, or any other form of reproduction
in legible symbols or characters.
  WRITTEN NOTICE. A notification in writing delivered  by  hand  to  the
person  or parties intended, or delivered at or sent by mail to the last
business address known to the party giving such notice.
  YARD. That portion of a lot extending open and unobstructed  from  the
lowest level to the sky along the entire length of a lot line.
  ZONE.  A vertical division of a building fire standpipe system used to
establish the water working pressures within  the  system  and  also  to
limit the pressure at the lowest hose outlet in the zone.
  ZONING  RESOLUTION.  The  zoning  resolution  of the city of New York,
adopted December fifteenth, nineteen hundred  sixty-one,  including  all
amendments thereto.