A.Â
Buildings occupied in whole or in part as defined
in this code shall comply with the requirements hereinafter set forth
concerning occupancy, size, light and ventilation in order to provide
safe and healthful environment.
B.Â
The term "accessory use" shall have a uniform meaning
and shall apply in the same manner and under the same conditions or
restrictions to all residential buildings.
A.Â
Every dwelling unit shall contain at least 120 square
feet of habitable floor space for the first occupant thereof and at
least 90 additional square feet of habitable floor space for every
additional occupant thereof, the floor space to be calculated on the
basis of total habitable floor area within the dwelling unit.
B.Â
In lodging units and rooming units the maximum number
of occupants shall be limited to the number determined on the same
basis as for dwelling units.
C.Â
In buildings occupied as clubs, dormitories, sorority
or fraternity houses and providing sleeping accommodations for more
than five persons, the maximum number of occupants so accommodated
in any habitable room shall be limited to the number determined on
the basis of the floor area, in square feet, of the room divided by
50 square feet per occupant.
A.Â
It shall be prohibited to use for sleeping purposes
any kitchen, nonhabitable space or public space.
B.Â
It shall be prohibited, in lodging houses and rooming
houses, to use for dining purposes any communal kitchen containing
less than 100 square feet of floor area or any nonhabitable space
or public space other than dining space.
C.Â
It shall be prohibited to use any cellar space in
a multiple dwelling as habitable space. Cellars in one- and two-family
dwellings may be used as habitable space, provided that the cellar
complies with all the following requirements:
(1)Â
Combustion air shall not be taken from habitable space
directly or indirectly.
(2)Â
All habitable space in cellars shall be ventilated
by mechanical means. The ventilating system shall replace the air
in the habitable spaces at least three times per hour. The air supply
of said ventilation system shall be from the exterior or may be drawn
from the floor above, provided that the floor above is occupied by
the same tenancy as the cellar.
(3)Â
Walls of cellars shall be constructed to prevent condensation
forming thereon when the relative humidity in the habitable area is
35%.
(4)Â
All fuel-burning equipment shall be separated from
habitable space by a partition having a minimum fire rating of one
hour.
A.Â
Habitable space shall have a minimum ceiling height
of seven feet six inches over 50% of the floor area; and the floor
area where the ceiling height is less than five feet shall not be
considered in computing floor area.
B.Â
A dwelling unit shall contain at least one habitable
room having a minimum of 120 square feet of floor area and a minimum
horizontal dimension of 10 feet.
C.Â
Kitchens shall have a minimum of 60 square feet of
floor area, and other habitable spaces shall contain not less than
70 square feet of floor area and shall have a minimum horizontal dimension
of seven feet.
D.Â
Every alcove less than 60 square feet in area, except
a cooking space or foyer, shall be deemed to be part of a habitable
room. The area of the opening in the dividing partition between the
alcove and the room shall be at least 80% of the wall area of such
partition, measured on the alcove side, but not less than 40 square
feet. The depth of such alcove shall not exceed half its width. The
floor area of the alcove shall be added to the floor area of the room
in determining light and ventilation requirements for the room. An
alcove with an area of 60 square feet or more, but less than the required
area of a habitable room, shall be separately lighted and ventilated
as required for habitable space.
Basements shall not be deemed habitable unless
all of the following conditions shall be met: Such room shall be at
least seven feet six inches in height in every part from the finished
floor to the ceiling. Ceilings of such rooms shall be at least three
feet six inches above the surface of the street, alley, yard or court
adjoining the same. There shall be appurtenant to such room if used
for sleeping purposes the use of a water closet. Every room shall
have a window or windows opening upon the street, an alley or upon
a yard or court. The total area of windows in every room shall be
at least one-eighth (1/8) of the floor area of the room, and the sash
shall be made to open the full width, and the top of each window shall
be within six inches of the ceiling. All exterior walls surrounding
such room shall be dampproof. The floor of such room shall be dampproof
and waterproof.
A.Â
Habitable space shall be provided with natural light
through one or more windows, skylights, transparent or translucent
panels, or any combinations thereof, that face directly on legal open
spaces at least six inches above the adjoining finished grade or are
above a roof. The amount of light required for each room shall be
equivalent to that transmitted through clear glass equal in area to
10% of the floor area of the habitable space.
B.Â
Habitable space shall be provided with electric light.
C.Â
Every habitable room shall be provided with natural
ventilation through at least one window opening that faces directly
on legal open space. No such window shall be less than 12 square feet
in area between stop-beads, and the top of at least one window shall
not be less than six feet six inches above the floor. It shall be
constructed so that at least 45% of its area may be opened. A skylight
arranged to give a clear ventilating opening of eight square feet
shall be deemed the equivalent of the window called for, but such
skylight shall not be placed on any shaft on which a window of a toilet
room opens.
D.Â
Habitable space also may be provided with mechanical
ventilation, in lieu of or in addition to natural ventilation.
A.Â
Dwelling units shall be separated from each other
and from other spaces outside the dwelling unit.
B.Â
Sleeping rooms within dwelling units shall be separated
from each other and from other spaces outside the sleeping rooms to
provide privacy.
C.Â
Lodging units and boarding units shall be separated
from each other and from other spaces outside the lodging units.
D.Â
A communal kitchen or dining room in a lodging house
shall be accessible to the occupants sharing such kitchen or dining
room without going through a dwelling unit or lodging unit of another
apartment.
Public space shall have a minimum height of
seven feet six inches measured from finished floor to finished ceiling.
A.Â
Public spaces shall be provided with electric light.
B.Â
In public stairs, stairways and passageways, electric
lighting shall be available at all times so as to afford safe passage
for occupants and users. Such lighting shall conform to the following:
(1)Â
A sufficient number of fixtures shall be provided
so that the distance between fixtures is not more than 30 feet and
so that no wall is more than 15 feet distant from a fixture.
(2)Â
Incandescent lighting shall be based on not less than
one-four (1/4) watt per square foot of floor area, except that each
fixture shall have a lamp or lamps with a total of not less than 25
watts.
(3)Â
Fluorescent lighting shall be based on not less than
one-tenth (1/10) watt per square foot of floor area, except that each
fixture shall have a lamp or lamps of a total of not less than 15
watts.
(4)Â
Where under these formulas the calculated wattage
does not correspond to that of a standard lamp, the next larger size
shall be used.
C.Â
Public spaces shall be provided with either natural
ventilation, conforming to the requirements for habitable space, or
with mechanical ventilation.
Nonhabitable space, except crawl spaces and
attics, in multiple dwellings shall have a minimum height of seven
feet measured from floor to ceiling.
A.Â
In every private dwelling, apartment house and multiple
residence, there shall be a separate water closet for each family.
Each such water closet shall be placed in a room completely separated
from every other water closet; such room shall be not less than three
feet wide and shall be enclosed with partitions which shall extend
to the ceiling. No drip trays shall be permitted in connection with
any water closet nor shall a water closet fixture be enclosed.
B.Â
Toilet rooms and bathrooms shall have provisions for
privacy.
C.Â
Toilet rooms and bathrooms for dwelling units in multiple
dwellings shall be located within the dwelling units and shall be
accessible from any sleeping room without passing through any other
sleeping room.
D.Â
Unless located within dwelling units or directly connected
with sleeping rooms, toilet rooms and bathrooms in multiple dwellings
shall be provided in each story containing habitable space and shall
be accessible thereto.
E.Â
Toilet rooms for employees in multiple dwellings shall
be in separate room for each sex where there are five or more employees,
shall be readily accessible to such employees and shall not open directly
into any public kitchen or other public space used for the cooking
or preparation of food.
F.Â
In one- and two-family dwellings, bathrooms and toilet
rooms shall be provided with floors of moisture-resistant material.
G.Â
In multiple dwellings, floors of bathrooms, toilet
rooms and similar spaces shall be waterproof; such waterproofing shall
extend six inches or more above floors except at doors, so that floors
can be flushed or washed without leaking. Walls shall be constructed
or covered with a moisture-resistant material.
H.Â
All shower enclosures shall have waterproof floors
and water-resistant walls.
I.Â
No water closet shall be placed out of doors.
A.Â
Kitchenettes, bathrooms and toilet rooms shall be
provided with electric light appropriate for the use of such rooms.
B.Â
Laundry rooms, furnace rooms and similar nonhabitable
spaces shall be provided with electric light appropriate for the use
of such rooms.
C.Â
Stairs shall be provided with electric light to allow
safe ascent or descent.
D.Â
Kitchenettes, bathrooms and toilet rooms shall be
provided with ventilation in accordance with either of the following:
Natural ventilation as required for habitable space, except that for
toilet rooms and bathrooms, a window shall not be less than one foot
in width measured between the stop-beads and shall not be less than
five square feet in area, and the openable area of a window in a kitchenette
shall not be less than three square feet; or mechanical ventilation
exhausting not less than 25 cubic feet per minute for bathrooms and
toilet rooms and not less than 100 cubic feet per minute for kitchenettes.
E.Â
Spaces in multiple dwellings which contain central
heat-producing, air-conditioning and other equipment shall be ventilated
to the outer air, and air from these spaces shall not be recirculated
to other parts of the building.
F.Â
Ventilation shall be provided in unheated attics,
spaces below flat roofs and in crawl spaces. Location and net areas
of ventilation openings shall be such as to minimize deterioration
of structural members from condensation or other causes, in conformity
with generally accepted standards.
A.Â
Safe, continuous and unobstructed exit shall be provided
from the interior of the building to the exterior at street or grade
level.
B.Â
Exits shall be arranged, constructed and proportioned
so that occupants may escape safely from the building in case of emergency.
C.Â
In one- and two-family dwellings, in addition to a primary exit from the building, there shall be provided a secondary exit or, in lieu thereof, one or more openings for emergency use as defined in § 231-25.
D.Â
In multiple dwellings approved exits shall be provided.
A.Â
At least one opening or secondary exit shall be provided
at each floor level containing a habitable space or recreation room.
B.Â
Such openings shall include doors and openable parts
of windows, located so as to provide ready access to legal open spaces.
C.Â
Such openings shall have a minimum area of five square
feet, with a minimum dimension of 16 inches, with bottom of openings
no higher than three feet above finished floor in all above-grade
stories and no higher than four feet six inches where required in
basement and cellar.
One- and two-family dwellings exceeding three
stories in height shall have exits from every story which shall provide
safe continuous passage to a legal open space and which shall comply
with one of the following requirements:
A.Â
One interior stairway enclosed in a fire separation
having a fire resistance rating of at least one hour. All openings
in such enclosures shall be provided with a self-closing opening protective
as set forth in the following table:
Opening Protectives For Interior wall
Openings
| ||
---|---|---|
Fire-resistance rating of wall separation
in which opening occurs, in hours
|
Fire-resistance rating of opening protective,
in hours
| |
2 or more
|
1Â 1/2
| |
1 or 3/4
|
1
|
B.Â
Two interior stairways with all doors opening upon
such stairways equipped with a self-closing device.
C.Â
One interior stairway with all doors opening upon
such stairway equipped with a self-closing device and one exterior
stairway or fire escape providing exit from each dwelling unit on
any story.
D.Â
One interior stairway equipped with an automatic sprinkler
system, with all doors opening upon such stairway equipped with a
self-closing device.