Absorber |
is that part of the low side of
an absorption system used for absorbing refrigerant vapor |
Absorption
System |
is a refrigeration system in
which the refrigerant gas evolved in the evaporator is taken up in an
absorber and released in a generator upon the application of heat |
Accepted
Engineering
Practice |
shall be the compliance with the
provisions of this ordinance, or in the absence of such provisions,
with the standards, tests, or principles which are accepted as
representing good practice in the building profession by accredited
agencies |
Accessory |
is any subordinate part, object,
or device added or attached to a building or structure for convenience
or attractiveness |
Accessory
Building
or
Use |
is one which: a. contributes to the comfort, convenience or necessity of occupants of the principle building or use which it serves; b. contributes to the comfort, convenience or necessity of occupants of the principle building or use served; and c. is located on the same zoning lot as the principle building or use served, with the single-exception of such accessory off-street parking facilities as are permitted to locate elsewhere than on the same zoning lot with the building use served. |
Accredited
Agency |
is an authoritative agency which
is approved and accepted by this ordinance. Conformance
with the standards and specifications established by such "accredited
agency" shall be accepted as meeting the requirements of this ordinance
within the limitations and conditions inherent in the provisions of
this ordinance. |
Addition |
is any change to a building or
structure which increases the area of such building or structure or any
of its exterior dimensions |
Admixture |
is a material other than water,
aggregate or Portland cement, that is used as an ingredient of concrete
or mortar and is added to the batch immediately before or during mixing. |
Aggregate |
in the case of materials of
construction, is designated inert material which when bound together
into a conglomerated mass by a matrix forms concretes, mastic, mortar,
plaster, etc. |
Agriculture |
is the use of land for
agricultural purposes, including farming, dairying, pasturage,
agriculture, horticulture, floriculture, viticulture, and animal
and poultry husbandry, and the necessary accessory uses for packing,
treating or storing the produce; provided, however, that the operation
of any such accessory uses shall be secondary to that, of the normal
agricultural activities |
Agricultural
Building
or
Structure |
for the purposes of this
ordinance, shall imply any building or structure existing or erected on
land used principally for agricultural purposes, including farm
residences |
Air
Compressor |
is a device for supplying air
under pressure to the pressure tanks or the cushion tank of a
sprinkler system, or to the cushion tank of an inside standpipe system,
or to a dry pipe sprinkler system or to a pneumatic domestic water
supply system. |
Air
Conditioning |
is the process by which,
simultaneously, the temperature moisture content, movement and quality
of the air in enclosed spaces intended for human occupancy may be
maintained within required limits |
Air
Duct |
is a tube or conduit or an
enclosed space or chamber used for conveying air |
Air
Gap |
in the water supply system is
the unobstructed vertical distance through the free atmosphere between
the lowest opening from any pipe of faucet supplying water to a
tank, plumbing fixture, or other device and the flood-level rim of the
receptacle. |
Aisle |
is the clear width and length of
an area which is provided for ingress and egress between rows of
fixed or movable seats and a wall, or between seats, desks, tables,
counters, machines or other equipment or materials, or between such
articles or materials and a wall or part of the building structure |
Aisle,
Longitudinal |
in a place of assembly, is an
aisle approximately perpendicular to the rows of seats served thereby |
Aisle,
Transverse |
in a place of assembly, is
an aisle approximately parallel to the rows of seats |
Alarm
Sending
Station |
is a manually actuated device
sued to sound an alarm signal |
Alarm
Signal |
is a signal indicating an
emergency requiring immediate action, as an alarm from an alarm sending
station or from an automatic fire alarm system |
Alarm
Sounding
Device |
is an approved horn used to
signal an alarm, and which shall be distinguishable from all other
sounding devices in the building |
Alcove |
is a recess adjoining, and
connected with a larger room, with an unobstructed opening into such
room |
Alley |
is a public right-of-way which
normally affords a secondary means of access to abutting property |
Alteration |
is any change, rearrangement or
modification in construction or in building equipment, other than
repairs, which does not increase the area or any of the exterior
dimensions of the building or structure |
Amusement
Building |
is a building, other than an
Open Air Assembly Building, constructed to contain amusements in which
the public takes an active part |
Amusement
Device |
is a mechanically operated
device or structure by which individuals are conveyed or moved in an
unusual manner for diversion |
Amusement
Structure |
is a structure supporting an
amusement device |
Anesthetizing
Locations |
are areas in hospitals or
medical buildings in which flammable anesthetics are or may be
administered to patients. Such locations include operating rooms,
delivery rooms and anesthesia rooms, and also include any corridors,
utility rooms, or other areas which are or may be used for
administering flammable anesthetics to patients. Recovery rooms
are not classed as anesthetizing locations unless also used for
administering flammable anesthetics. |
Anesthetic
Storage
Location |
is any room within a consuming
facility used for the storage of flammable anesthetic or disinfecting
agents or anesthetic machines to which cylinders of flammable gases are
attached |
Annunicator,
Car |
is an electrical device in an
elevator car which indicates visually the landings at which an elevator
landing signal registering device has been actuated |
Apartment |
is a dwelling unit in a
multiple-family dwelling |
Apartment
Building |
is a multiple-family dwelling |
Appendage |
is a cornice, molding, dormer,
bay or oriel window, balcony, marquee, canopy or any other accessory
projecting from and attached to a building |
Appliance
|
shall mean a device supplied
with fuel or electric power, having as its primary usage something
other than space heating |
Appliance,
Sealed
Combustion
Type |
is a an appliance so constructed
and installed that all air for combustion is derived from outside the
space being heated and all flue gases are discharged to the outside
atmosphere. Such appliance, having integral venting, shall be
considered as being properly vented when it is installed in accordance
with its listing and manufacturer's instructions |
Approved |
means passed upon favorably by
the Building Commissioner, or other specified authoritative body
referred to in the provisions of this ordinance |
Architectural
Terra
Cotta |
is plain or ornamental (molded
or extruded) hard burned building units, usually larger in face size
than brick, consisting of mixtures of plastic clays, fusible materials,
and grog, and having a glazed or unglazed ceramic finish. (See
Ceramic Veneer) |
Area
Drain |
is a receptacle designed to
collect surface or rain water from an open area |
Area
of
Special
Flood
Hazard |
The land which is to a one
percent chance of flooding annually. This area may also be
identified as that which is subject to the 100 year flood. The
area is designated as Zone "A, A1-A30, AH or AO," on the maps provided
by the Federal Emergency Management Agency |
Areaway |
is an open subsurface space,
adjacent to a building, used as an exitway , or to provide light
or air; such areaway may be uncovered or covered with grating |
Artificial
Barricade |
is an artificial mound or
revetted wall of earth of a minimum thickness of three (3) feet |
Ashlar
Masonry |
is masonry composed of
rectangular units usually larger in size than brick, properly
bonded, having sawed, dressed or squared beds and mortar joints. |
Attic |
is the space between the ceiling
beams of a top habitable story and the roof rafters |
Automatic |
as applied to fire protection
assemblies such as doors windows, or other protections for an opening,
shall mean that such door, window or other protection is so constructed
and arranged that if open it will automatically close when actuated by
an approved fire detection device, under a fire condition. |
Automatic
Detector,
Thermostatic
Type |
is a fire detector with an
integral assembly of heat-responsive elements and non-coded electrical
contacts which function automatically under an increase in air
temperature and either of the fixed temperatures or combination
fixed-temperature and rate-of-rise type. |
Automatic
Fire
Alarm
System |
is a system which automatically
detects a fire condition and actuates an approved fire alarm signal
device |
Automatic
Fire
Assembly |
is a fire assembly which may
remain in an open position and will close automatically if subjected to
an increase in temperature. The closing device shall be activated
at a maximum temperature of 165 deg. F. unless otherwise specified in
this ordinance |
Automatic
Fire
Door |
is a door designed to prevent
the passage of fire, normally in an open position but arranged to close
automatically in the event of fire, with closing mechanism released by
the melting of a fusible link or other release device actuated by fire
or smoke. |
Automatic
Sprinkler
System |
is a standard approved system
consisting of one or more sources of supply of water through a
controlling valve with an alarm sending device to indicate system
operation, with piping, valves, controls and devices for
anatomically distributing water upon a fire in sufficient
quantities either to extinguish it or hold it in check until it can be
manually extinguished, and conforming to the requirements of this
ordinance. |
Automobile
Service
Station |
is a building, structure or
premises designed or used for the retail sale or dispensing of fuel,
lubricants, tires, batteries, accessories and supplies including
installation and minor services customarily incidental thereto;
facilities for chassis and gear lubrication and for the washing of
motor vehicles are permitted only if enclosed in a building. |
Auxiliary
Use |
is a room or space normally
provided and incidental to the principle use of a building and under
the same management and control. (See Section 6.1. |
Awning,
Fixed |
is a non-retractable shelter
supported by cantilevering or bracketing from the face of the building
and covered with canvas, wood, metal or other approved materials
to provide protection from the elements. |
Awning,
Retractable |
is a shelter fastened to the
face of the building which, when opened by the operation of folding
arms or other retractable supports, provides protection from the
elements under canvas, metal or other approved materials. |
Backflow |
is the flow of water or other
liquids or substances into the distributing pipes of a potable supply
of water from any source or sources other than its intended
source. (See Back-Siphonage). |
Backflow
Connection |
or condition, is any arrangement
whereby backflow can occur |
Backflow
Preventer
|
is a device or means to prevent
backflow into the potable water system |
Back-Siphonage |
is the flowing back of used,
contaminated or polluted water from a plumbing fixture or vessel into a
water supply pipe due to a negative pressure in such pipe. (See
Backflow). |
Balcony |
is: a. An exterior auxiliary floor space, projecting from the exterior wall of an enclosed structure and unenclosed by other than a railing or parapet wall. b. As applied to places of assembly, a seating level located above the main floor of an auditorium |
Bar,
Deformed |
is a concrete reinforcing steel
member with an irregular surface designed to increase its bond with the
concrete |
Bar,
Plain |
is a concrete reinforcing steel
member not qualifying as a deformed bar |
Barricaded |
shall mean that a building
containing explosives is effectually screened from a magazine,
building, railway, or highway, either by a natural barricade, or by an
artificial barricade of such height that a straight line from the top
of any sidewall of the building containing explosives to the eave line
of any magazine, or building, or to a point twelve (12)
feet above, the center of a railway or highway, will pass through
such intervening natural or artificial barricade. |
Base
Flood |
The flood having a one percent
chance of being equaled or exceeded in any given year. The base
flood is also known as the 100 year flood. If the 100 year flood
information is not available, the base flood shall be the flood of
record. |
Base
Flood
Area |
The land subject to inundation
by waters of the base flood |
Base
Flood
Elevation
also
Regulatory
Flood
Elevation |
is that surface elevation of the
water level at the highest flood of record, except in areas where the
elevation of the one hundred (100) year flood is depicted. In
such cases, the base flood elevation is the elevation of the one
hundred (100) year flood. The base flood elevation is generally
the highest elevation of the base flood and usually marks the line
between the land designated in the floodplain as the floodway
fringe and the flood table land. The base flood elevation, the
floodway and the floodway fringe shall be described by maps, profiles,
elevation data and other sources of information which are listed and on
file in the Department of Building and Zoning. The "Sources of
Information" are listed according to priority of use in Article 8.95
Flood Damage Prevention Regulations of the Cook County Zoning Ordinance. |
Basement |
is a a portion of a building or
structure, having one-half (1/2) or more of its ceiling height below
the finished lot grade level. |
Battery
of
Fixtures (Plumbing) |
is any group of two (2) or more
similar adjacent fixtures which discharge into a common horizontal waste or soil branch. |
Bay
Window |
is a window in a wall which
projects beyond the wall line of the building |
Bearing-Type
Connection |
is a bolted connection in which
stress is transferred in bearing from the bolt shank to the side of a
hole in which the bolt is placed. |
Blasting
Agent |
is any material or mixture,
consisting of a fuel and oxidizer, intended for blasting, not otherwise
classified as an explosive, in which none of the ingredients are
classified as explosives, provided that the finished produce, as mixed
and packaged for use or shipment, cannot be detonated by means of a No.
8 test blasting cap when unconfined. Materials or mixtures
classified as nitro-carbo-nitrates by Interstate Commerce Commission
regulations shall be included in this definition. |
Boat
House,
Private |
is a boathouse for four (4) or
less motor boats with no provision for repairing or servicing such
vehicles for profit. |
Boat
House,
Commercial |
is a boat house for more than
four (4) motor boats, and/or a boat house having provision for
repairing or servicing such vehicles for profit. |
Boiler |
is a closed vessel used to heat
a fluid, usually water, or for the application of heat to generate
steam or vapor. |
Boiler-Blow-Off
|
is an outlet on a boiler to
permit emptying or the discharge of sediment. |
Boiler,
High
Pressure
|
is a boiler in which steam is
generated at pressures exceeding 15 pounds per square inch above
atmospheric pressure |
Boiler,
Hot
Water
Supply |
is a boiler having a volume
exceeding 120 gallons, or a heat input exceeding 200,000 Btu per hour,
or an operating temperature exceeding 200 deg. F., that provide hot
water to be used externally of itself. |
Boiler,
Low
Pressure
Hot
Water |
is a boiler in which water is
heated for the purposes of supplying water at a working pressure
not exceeding 30 pounds per square inch and at temperatures not
exceeding 250 deg. F. |
Boiler,
Low
Pressure
Steam |
is a boiler in which steam is
generated at pressures not exceeding 15 pounds per square inch above
atmospheric pressure |
Bonder
(Header) |
is a masonry unit which ties two
(2) or more wythes of the wall together by overlapping |
Branch
(Plumbing) |
is any part of the piping system
other than a main, riser or stack. |
Branch
Interval |
is a length of soil or waste
stack corresponding in general to a story height, but in no case less
than eight (8) feet, within which the horizontal branches from
one floor or story of a building are connected to the stack. |
Branch
Vent |
is a vent connecting one or more
individual vents with a stack or stack vent. |
Brazed
Joint |
is a gas-tight joint obtained by
the joining of metal parts with alloys which melt at temperatures
higher than 1,000 deg F., but less than the melting temperatures of the
joined parts. |
Breeching |
is a primarily horizontal pipe
used to convey the products of combustion from a heating appliance to a
flue. |
Brick |
is a solid masonry unit.
The word "brick" used without qualification indicates that its
composition is primarily of clay, shale or a mixture thereof, and that
these ingredients have been fused together as a result of
exposure to heat. Brick may be composed of other materials when
so designated, as for example, "concrete brick" and "sand lime brick". |
Brine |
is any liquid used for the
transmission of heat without a change in its state, having no flash
point above 150 deg F., determined by AASTM D93-52 |
Brine
Cooler |
is an evaporator for cooling
brine in an indirect system |
Building |
is a structure, or part thereof,
built for the support, shelter, or "enclosure of persons, animals,
chattels, or movable property of any kind and which is permanently
affixed to the land. When separated by fire walls, each unit so
separated shall be deemed a separate building. |
Building
Drain |
is that part of the lowest
piping of a drainage system which receives the discharge from soil,
waste, and other drainage pipes inside the walls of the building and
conveys it to the building sewer, beginning three (3) feet outside the
building wall. |
Building,
Existing |
is a building or structure which
has been completed and ready for occupancy. |
Building
Height |
is the vertical distance
measured from the curb level, or its equivalent, opposite the center of
the front of the building to the highest point of the under side of the
ceiling beams in the case of a flat roof; to the deck line of a mansard
roof; and to the mean level of the under side of the rafters between
the eaves and the ridge of a gable, hip, shed, gambrel or any other
pitched roof. Where no curb level has been established the height
of the building shall be measured from the mean elevation of the
finished lot grade at the front of the building. |
Building,
Inhabited |
is a building regularly occupied
in whole or in part as a habitation for human beings, or any church,
school, railway station, store or other structure where people are
accustomed to assemble, except any building or structure occupied in
connection with the manufacture, transportation, storage or use of
explosives |
Building,
Pre-Ordinances |
is the building which was
completed, or for the construction of which a permit was issued,
prior to the effective date of this ordinance |
Building,
Principle |
is a non-accessory
building in which the principle use of the lot on which it is located
is conducted. |
Building
Sewer |
is that part of the horizontal
piping of a drainage system which extends from the end of the building
drain and which receives the discharge of the building drain and
conveys it to the public sewer, private sewer, central sewage disposal
system, individual sewage disposal system, or other point of disposal. |
Building
Storm
Drain |
is a building drain used for
conveying rain water, surface water, ground water, subsurface water,
condensate, cooling water or other similar discharge to a building
storm sewer or a combined building sewer, extending to a point not less
than three (3) feet outside the building. |
Building
Storm
Sewer |
is the extension from the
building storm drain to the public or central storm sewer, combined
sewer, or other point of disposal. |
Building
Subdrain |
is that portion of a drainage
system which cannot drain by gravity into the building sewer. |
Building
Trap |
is a device fitting, or assembly
of fittings installed in the building drain to prevent circulation of
air between the drainage system of the building and the building sewer |
Buffer |
is a device designed to stop a
descending elevator car or counterweight beyond its normal limit of
travel by storing or by absorbing and dissipating the kinetic energy of
the car or counterweight. Oil Buffer A buffer using oil as a medium which absorbs and dissipates the kinetic energy of the descending car or counterweight Oil Buffer Stroke The oil displacing movement of the buffer plunger or piston, excluding the travel of the buffer-plunger accelerating device Spring Buffer A buffer which stores in a spring the kinetic energy of the descending car or counterweight Spring Buffer Load Rating The load required to compress the spring an amount equal to its stroke Spring Buffer Stroke The distance the contact end of the spring can move under a compressive load until all coils are essentially in contact. |
Bulk
Storage
Plant |
is a location where gasoline or
other volatile, flammable liquids are stored in tanks having an
aggregate capacity of one car load or more, and from which such
products are distributed |
Bumper |
is a device other than an oil or
spring buffer, designed to stop a descending elevator car or
counterweight beyond its normal limit of travel by absorbing the
impact. |
Buttress |
is a projecting part of a
masonry wall built integrally therewith to furnish lateral stability |
Canopy |
is a roof-like structure
projecting from a wall and supported in whole or in part by vertical
supports to the ground, and erected for the major purpose of shelter
from the weather. |
Car,
Elevator |
is the load-carrying unit
including its platform, car frame, enclosure and car door or grate |
Car,
Enclosure |
is the top and the walls of the
elevator car, resting on and attached to the car platform. |
Car
Frame
(Sling) |
is the supporting frame to which
the elevator car platform, upper and lower-sets of guide shoes, car
safety and the hoisting ropes or hoisting-rope sheaves, or the plunger
of a direct plunger elevator are attached Car Frame, Overslung A car frame to which the hoisting-rope fastenings or hoisting-hope sheaves are attached to the crosshead or top member of the are frame Car Frame, Underslung A car frame to which the hoisting-rope fastenings or hoisting-rope sheaves are attached at or below the car platform. Car Frame, Sub-Post A car frame all of whose members are located below the car platform. |
Car
Platform |
is the structure which forms the
floor of the car and which directly supports the load. |
Cast-In
Place
Construction |
is construction in which
concrete is deposited in its final position |
Cement,
Portland |
is the produce obtained by
finely pulverizing clinker consisting essentially of hydraulic calcium
silicates, to which no additions have been made subsequent to
calcination other than water or untreated calcium sulfate, except that
additions not to exceed one percent, of other materials, may be
interground with the clinker at the option of the manufacturers,
provided such materials in amounts indicated have been shown by tests
to be not harmful |
Ceramic
Veneer |
is a type of an architectural
terra cotta, characterized by thinner sections ranging from one and
one-eighth (1-1/8) to two and one-half (2-1/2) inches in thickness |
Certified
Test
Reports |
are reports by any approved
independent testing laboratory |
Chase |
is a continuous recess in a
wall, to receive pipes, ducts, conduits, etc. |
Check
Valve |
is a valve allowing flow in one
direction only, and specifically designed for the fluid handled |
Child
Day
Care
Center |
is any child care facility
receiving three (3) or more children for care or supervision during
part or all of the day, between the hours of 6:00 a.m. and 9:00
p.m. Day nurseries, nursery schools, play group centers, and
centers for mentally retarded children shall be included in the general
term "Child Day Care Centers" |
Chimney |
is a primarily vertical
enclosure or structure containing one or more flues a. Interior Chimney A chimney built within the walls of a building and having lateral support from the building structure b. Exterior Chimney A chimney built outside the walls of a building but receiving lateral support from the exterior walls of the building c. Isolated Chimney A chimney that is not built within the walls of a building and does not receive lateral support from the building. Guys or struts shall not be considered as lateral support for the purpose of this definition |
Cinema |
is an Assembly Building designed
or used exclusively for the presentation of motion pictures and having
a stage depth less than 15 feet. |
Circuit
Vent
(Plumbing) |
is a branch vent that serves two
(2) or more traps and extends from in front of the last fixture
connection of a horizontal branch to the vent stack |
Classroom |
is a room used for the
instruction of students in a group |
Closed
Cup
Flash
Point |
is the lowest temperature at
which is combustible liquid, under prescribed conditions, will give off
a flammable vapor, which, will turn momentarily |
Coal
Silo
or
Pocket |
is a separate structure used for
the receiving storage or disposing of coal |
Collapsible
Revolving
Door |
is a revolving door which is
designed, supported and constructed so that the wings will release and
fold back in the direction of egress under pressure exerted by persons
under panic conditions, providing a legal passage way on both sides of
the door pivot. |
Column |
is an upright compression member
the length of which exceeds three (3) times its least lateral
dimension |
Combination
Fixture
(Plumbing)
|
is a fixture combining one sink
and tray or a two-or- three-compartment sink or tray in one unit. |
Combination
Waste
and
Vent
System
(Plumbing)
|
is a specially designed system
of waste piping embodying the horizontal wet venting of one or more
sinks or floor drains by means of a common waste and vent pipe
adequately sized to provide free movement of air above the flow line of
the drain |
Combined
Building
Sewer |
is a sewer that receives both
storm water and sewage |
Combustible
Material |
is a material which does not
comply with the definition of incombustible material |
Common
Vent
(Plumbing)
|
is a vent connecting at the
junction of two (2) fixture drains and serving as a vent for both
fixtures |
Compact
Section |
is a steel flexural member so
proportioned that local buckling will not occur before the full plastic
moment is reached. |
Companion or
Block Valves |
are pairs of mating stop valves,
valving off sections of systems and arranged so that the same sections
may be joined before opening these valves, or separated after closing
them |
Compensating-Rope
Sheave
Switch |
is a device which automatically
causes the electric power to be removed from an elevator
driving-machine motor and brake when the compensating sheave approaches
its upper or lower limit of travel |
Compensatory
Storage |
An artificially excavated volume
of storage within the base floor areas used to balance the loss of
natural flood storage capacity when artificial fill or structures are
placed within the floodplain. (Uncompensated loss of natural
floodplain storage can increase off site floodwater elevations and
flows). |
Compressor |
is any device having one or more
pressure imposing elements in a refrigerating system to increase the
pressure of the refrigerant in its gas or vapor state for the purpose
of liquefying the refrigerant. |
Compressor
Relief
Device |
is a valve or rupture member
located between the compressor and the stop valve on the discharge side
arranged to relive the pressure at a predetermined point. |
Compressor
Unit |
is a condensing unit, less the
condenser and liquid receiver |
Concrete |
is a mixture of cement,
aggregates and water |
Concrete,
Gypsum |
is a combination of aggregate or
aggregates with calcined gypsum as a binding medium which after mixing
with water sets into a conglomerate mass. (Gypsum Fiber
Concrete-0gypsum concrete in which the aggregate consists of shavings,
fiber or chips of wood) |
Concrete
Masonry
Unit |
is a building unit made from
cement and suitable aggregate such as sand, gravel, crushed-stone
cinders, burned clay or shale, or blast furnace slug. |
Concrete,
Plain |
is a concrete without metal
reinforcement, or having been reinforced only for shrinkage or
temperature changes. |
Concrete,
Pneumatically
Placed |
is a mixture of fine aggregate
and cement pneumatically applied by suitable mechanism and to which
water is added immediately prior to discharge from the
applicator. It shall be considered as concrete for particulars of
design as specified in Article XXIX. |
Concrete,
Precast |
is construction whereby concrete
members are case in a place prepared for this purpose, to be moved to
their final position. |
Concrete
Prestressed |
is construction of concrete
members, cast-in-place of precast, in which controlled forces create
controlled internal stresses. The following terms are used in
this ordinance in the application of provisions governing prestressed
concrete. a. Tendons Steel members which generally are used to exert the prestressing force onto the concrete b. Transfer The act of application of the prestressing force to the concrete c. Pretensioning The system of prestressing concrete members whereby tendons are stressed prior to pouring of the concrete and the prestressing force is transmitted to the concrete by bond. d. Post-Tensioning The system of prestressing concrete members whereby tendons are stressed after the concrete has obtained a required strength and the prestressing force is transmitted to the concrete generally by anchoring the stressed tendons to the member e. Gradual Losses The reduction from the initial force to the working force, due to shrinkage, creep of the concrete and relaxation of the steel f. Elastic Shortening Losses Those losses due to the elastic deformation of the concrete at the time of transfer. g. Tensioning Losses Those losses incurred in post-tensioned concrete at the time of stressing and anchoring the tendons which are due to tendon friction and anchorage set, and vary with the system used. h. Forces: Jacking Force The force exerted by the ram on the tendon i. Initial Force The force left in the tendon immediately after transferring the prestressing force to the concrete j. Working Force The final force left in the tendons after all losses have occurred |
Concrete
Reinforced |
is concrete in which metal other
than that provided for shrinkage or temperature changes, is embedded in
such a manner that the two (2) materials act together in
resisting forces. |
Condenser |
is a vessel or arrangement of
piping or tubing in which vaporized refrigerant is liquefied by the
removal of heat |
Condensing
Unit |
is a specific refrigerating
machine combination for a given refrigerant, consisting of one or
more power driven compressors, condensers, liquid receivers (when
required), and any regularly furnished accessories; and the individual
components are designed to operate as one system |
Conflagration
Hazard |
is the fire risk involved in the
spread of fire by exterior exposure to, and from, adjoining
buildings and structures. |
Conflagration
Hazard
District |
is a geographical area in Cook
County within which certain types of construction are limited or
prohibited due to conflagration or high fire hazard, as established in
Article VII |
Construction
Equipment
|
is the construction machinery,
tools, derricks, hoists, scaffolds, platforms, runways, ladders, and
all material-handling equipment, safeguards and protective devices used
in construction operations |
Construction
Operation |
is the erection, alteration,
repair, renovation, demolition or removal of any building or structure;
and the excavation, filling and grading of lots in connection therewith |
Container
(Refrigeration) |
is a a cylinder for the
transportation of refrigerant as prescribed by the regulations of the
Interstate Commerce Commission for the transportation of such
refrigerants |
Continuous
Vent
(Plumbing) |
is a vertical vent that is a
continuation of the drain to which it connects |
Continuous
Waste
(Plumbing)
|
is a drain from two (2) or three
(3) fixtures connected to a single trap |
Controlled
Materials |
are materials which are selected
or tested to meet the special strength, durability and the resistance
requirements upon which the design is based, as provided in Article IV,
Section 4.6 |
Conveyor |
is the mechanical apparatus for
carrying material from one point to another, as by an endless belt,
chain of receptacles, or the like |
Cooling
Tower |
is a structure designed or used
for the cooling by exposure to the open air, of liquids used in the
operation of a refrigeration or air conditioning installation |
Coping |
is a cap or finish on top of a
wall, pier or pilaster to protect the masonry below from penetration of
water from above |
Corbel |
is a self or ledge formed by
projecting successive courses of masonry out from the face of the wall |
Corridor
(Hallway) |
is a horizontal passageway
which connects various rooms, apartments or any interior spaces of a
building or structure, and which provides a common way of travel to an
exit or to another passageway leading to an exit |
Corrosive
Liquid |
shall include those acids,
alkaline caustic liquids, and other corrosive liquids which when in
contact with living tissue, will cause severe damage of such tissue by
chemical action; or, in case of leakage, will materially damage or
destroy other containers of other hazardous commodities by chemical
action and cause the release of their contents; or are liable to
cause fire when in contact with organic matter or with
certain chemicals |
Course |
is a continuous horizontal layer
of masonry |
Court |
is an open, unobstructed space
on the same lot with a building and bounded on two (2) or more sides by
the walls of such building |
Court,
Inner |
is a court surrounded on all
sides by the exterior walls of the structures or by such walls and an
interior lot line |
Court,
Outer |
is a court open on one end to an
open space not less than 30 feet wide. The open space shall be a
public way, yard, or through courts or any combinations of two (2) or
more such areas |
Court,
Through |
is a court open at both ends to
two a(2) open spaces one of which shall be not less than 30 feet wide,
the opposite not less than ten (10) feet wide. The open spaces
shall be public ways, yards, permanent, easements, outer courts or
another through court, or a combination of two (2) or more such areas. |
Cross-Connection |
is any physical connection or
arrangement between two (2) otherwise separate piping systems, one of
which contains potable water and the other water of unknown or
questionable safety, whereby water may flow from one system to the
other, the direction of flow depending on the pressure differential
between the two (2) system (See Backflow and Back-Siphonage). |
Cushion
Tank |
is a tank holding water under
air pressure, connected to the discharge from a fire pump, and
supplying a sprinkler system or an inside standpipe system. |
Datum |
is a level surface, real or
assumed, having an established elevation and used as a reference to
establish the relative elevations of other surfaces or points |
Dead
End
(Plumbing) |
is a branch leading form a soil,
waste, or vent pipe, building drain or building sewer, which is
terminated at a developed distance of two (2) feet or more by means of
a plug or other closed fitting |
Dead
Load |
is the weight of all permanent
construction, including walls, floors, roofs, partitions, stairways and
fixed service equipment |
Deluge
System |
is a sprinkler system
employing open sprinklers attached to a piping system connected to a
water supply through a valve which is opened by the operation of a heat
responsive system installed in the same areas as the
sprinklers. When this valve opens, water flows into the piping
system and discharges from all the sprinklers attached thereto. |
Design
Working
Pressure |
is the maximum allowable working
pressure for which a specific part of a system is designed |
Development |
Any man-made change to
improved or unimproved real estate, including but not limited to
construction of or substantial improvements to buildings or other
structures, the placement of mobile homes, mining, dredging, filling,
grading, paving, excavation or drilling operations |
Direct-Expansion
System |
is a system in which the
evaporator is in direct contact with the refrigerated material or
space refrigerated or is located in an air-circulating passage or
duct connected with the space |
Dispensing
Islands |
areas elevated above surrounding
surfaces and on which are mounted dispensing pumps or other dispensing
devices. Where an individual pump or dispensing device is not
mounted on an elevated island, an area extending 18 inches in all
directions from the base of the pump or device shall be considered to
be a dispensing island. |
Double
Indirect
Vented
Open-Spray
System |
is one in which a liquid, such
as brine or water, cooled by an evaporator located in a vented
enclosure, is circulated through a closed circuit to a second
enclosure where it cools another supply of a liquid such as brine or
water and this liquid in turn is circulated to a cooling chamber and is
sprayed therein. |
Double
(or
Secondary)
Refrigerant
System |
is one in which an
evaporating refrigerant is used in a secondary circuit. Each
system enclosing a separate body of an evaporative refrigerant
shall be considered as a separate direct system. |
Downspouts |
See Leader |
Draft
Hood
or
Damper |
is a device place in the
breeching or vent pipe, or in an appliance and which is designed to
insure the ready escape of the products of combustion in the event of
no draft, back-draft, back-draft or stoppage, or prevent a back-draft
from entering the appliance |
Drain |
is any pipe which carries waste
water or water-borne wastes in a building drainage |
Drainage
System
(Drainage
Piping) |
includes all the piping within
public or private premises, which conveys sewage, rain water, or other
liquid wastes to a legal point of disposal, but does not include the
mains of a public or central sewerage system or private or public
sewage treatment or disposal plant. |
Dressing
Room |
as applied to Assembly
Buildings, is a room used or intended to be used, by a performer or
performers for dressing or changing of clothing |
Dry
Cleaning |
is the process of removing dirt,
grease, paints and other stains from wearing apparel, textiles,
fabrics, rugs, etc., by the use of non-aqueous liquid solvents a. Immersion and agitation with the solvent in open vessels b. Immersion and agitation with the solvent in closed machines c. "Brushing" or "scouring" with cleaning solvents |
Dry
Cleaning
Plant |
is a plant in which dry cleaning
is conducted |
Dry
Cleaning
Room |
is a room in which the dry
cleaning operations are conducted, including all additional sections
containing solvent or solvent handling equipment |
Dry
Dyeing |
is the process of dyeing clothes
or other fabrics or textiles in a solution of dye colors and
non-aqueous liquid solvents |
Dry-Pipe
System |
is a sprinkler system employing
automatic sprinklers attached to a piping system containing air under
pressure, the release of which, as from the opening of the sprinklers,
permits the water pressure to open a valve known as a "dry-pipe
valve". The water then flows into the pipe system and out the
opened sprinklers. |
Dual
Vent |
See common Vent |
Dumbwaiter |
is a hoisting and lowering
mechanism equipped with a car which moves in guides in a substantially
vertical direction, the floor ares of which does not exceed nine (9)
square feet, whose total inside height, whether or not provided with
fixed or removable shelves, does not exceed four (4) feet, the capacity
of which does not exceed 500 pounds and which is used exclusively for
carrying materials |
Dwelling |
is a building or portion
thereof, designed or used exclusively for residential occupancy |
Dwelling,
Attached |
is one which is joined to
another dwelling at one or more sides by a party wall or walls |
Dwelling,
Detached |
is one which is entirely
surrounded by open space on the same lot. |
Dwelling,
Multiple-Family |
is a Residential Building or
portion thereof, containing two (2a) or more dwelling units |
Dwelling,
Single-Family |
is a Residential Building
containing one (1) dwelling unit only |
Dwelling,
Two-Family |
is a Residential Building
containing two (2A) dwelling units only |
Dwelling
Unit |
consists of one or more rooms
which are arranged, designed or used as living quarters for one family
only |
Efficiency
Unit |
is a dwelling unit consisting of
one principle room, exclusive of bathroom, kitchen, hallway, closets or
dining alcove directly off the principle room. |
Elastic-Theory
and
Design |
refers to methods based upon use
of material within its elastic range, where a maximum working stress
is used |
Electrical
Equipment |
shall mean conductors and
equipment installed for the utilization of electricity supplied for
heat or power and signal light, heat, or power, not including radio
apparatus, or equipment for wireless, reception of signals and
does not include common carriers, which are under the jurisdiction of
the Illinois Commerce Commissioner for use in their operation as public
utilities. |
Elevation |
is the vertical distance of
a point above or below a known datum. The difference in elevation
between two points is the vertical distance between two level surfaces
in which the points lie. For the purpose of this Code, elevations
should be referenced to United States Geological Survey Datum or City
of Chicago Datum (0.00 CCD = 579.48 USGS) |
Elevator |
is a hoisting and lowering
mechanism equipped with a car or platform which moves in guides in a
substantially vertical direction, and which serves two (2) or more
floors of a building or structure: "elevator" is further defined
as one of the following types: |
Elevator,
Freight |
An elevator primarily used for
carrying freight, and on which only the operator and the persons
necessary for unloading and loading the freight are permitted to ride |
Elevator,
Gravity |
An elevator utilizing gravity
to move the car |
Elevator,
Hand |
An elevator utilizing manual
energy to move the car |
Elevator,
Passenger |
An elevator used primarily to
carry persons other than the operator and person necessary for loading
and unloading. |
Elevator,
Power |
An elevator utilizing energy
other than gravitational or manual to move the car. (1) Electric Elevator A power elevator where the energy is applied by means of an electric motor (2) Hydraulic Elevator A power elevator where the energy is applied by means of a liquid under pressure, in a cylinder equipped with a plunger or piston. (a) Direct-Plunger Elevator A hydraulic elevator having a plunger or piston directly attached to the car frame or platform (b) Electro-Hydraulic Elevator A direct-plunger elevator where liquid is pumped under pressure directly into the cylinder by an electric motor (c) Roped-Hydraulic Elevator A hydraulic elevator having its piston connected to the car with wire ropes |
Sidewalk
Elevator- |
A freight elevator which
operates between a sidewalk or other area exterior to the 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 |
Elevator
Control |
is a system of regulation by
which the starting, stopping, direction of motion, acceleration, speed
and retardation of an elevator are governed and further defined as one
of the following types: a. Generator-Field Control A system of control which is accomplished by the us of an individual generator for each elevator or dumbwaiter, wherein the voltage applied to the driving-machine motor is adjusted by varying the strength and direction of the generator field. b. Multi-Voltage Control A system of control which is accomplished by impressing successively on the armature of the driving-machine motor a number of substantially fixed voltages such as may be obtained from multi-commutator generators common to a group of elevators. c. Rheostatic Control A system of control which is accomplished by varying resistance and/or reactance in the armature and/or field circuit of the driving-machine motor d. Two-Speed Alternating Current Control A control for a two-speed driving machine induction motor which is arranged to run at two (2) different synchronous speeds by connecting the motor windings so as to obtain different number of poles |
Elevator
Landing |
is that portion of a floor,
balcony or platform used to receive and discharge passengers or freight Landing Zone A zone extending from a point 18 inches below a landing to a point 18 inches above the landing Landing, Bottom Terminal The lowest landing served by the elevator, which is equipped with a hoistway door and hoistway-door locking device which permits egress from the hoistway side Landing, Top Terminal The highest landing served by the elevator, which is equipped with a hoistway door and hoistway door locking device which permits egress from the hoistway side. |
Emergency
Relief
Valve |
is a manually operated valve for
the discharge of refrigerant in case of fire or other emergency |
Engines |
are such prime movers as
internal combustion engines, external combustion engines, gas
turbine engines, and free piston engines, using either gaseous fuels or
liquid , fuels or combinations thereof. |
Equipment |
consists of all mechanical,
electrical or storage devices and fixtures requiring conformance with
the ordinance in regard to construction, installation, operation,
alteration, maintenance and inspection. It shall include, among
others; elevators, plumbing, ventilation systems, heating apparatus,
refrigeration systems, boilers and electrical equipment. |
Evaporator |
is that part of the
refrigeration system in which liquid refrigerant is vaporized to
produce the refrigerating effect |
Excavation |
is any act by which organic
matter, earth, sand, gravel, rock or any other similar material is cut
into , dug, quarried, removed, displaced, relocated or bulldozed and
shall provide conditions resulting thereof. |
Exit |
is a means of egress from a
building, structure or premises |
Exit
Area |
is that area of a drive-in
theater which is used for holding cars which are exiting from the
spectator area and are waiting passage onto the public highway |
Exit
Connections |
shall include doorways, aisles,
corridors, foyers, lobbies and other horizontal means of exit leading
to a vertical exit, a horizontal exit, or an outside exit. |
Exit,
Horizontal |
is a protected opening through
or around a fire wall or is a bridge or link connecting two (2)
buildings or structures |
Exit,
Outside |
is an exit from the building to
a public way, to an open area leading to a public way, or to an
enclosed fire-resistive passage leading to a public way |
Exit,
Vertical |
is a means of exit used for
ascension or descension between two or more levels of a building
or structure |
Explosive |
is any chemical compound,
mixture, or device, the primary or common purpose of which is to
function by explosion. The term "explosive" includes all
materials classified as Class A, Class B, or Class C explosives
by Interstate Commerce Commission regulations; and includes but is not
limited to dynamite, black powder, pellet powders, initiating
explosives, blasting caps, electric blasting caps, safety fuse, fuse
igniters, fuse lighters, squibs, cordeau detonant fuse,
instantaneous fuse, igniter cord and igniters |
Exterior
Trim |
shall be construed to include
exterior wall decorations, cornices, gutters, leaders, balconies, storm
enclosures and all ornamental elements accessory to the structure
building frame |
Family |
consists of one or more persons,
each related to the other by blood (or adoption) together with such
blood relatives' respective spouses, who are living together in a
single
dwelling unit and maintaining a common household. A "family"
shall include any domestic servants and not more than one gratuitous
guest residing with said "family" |
Fence |
is a structure forming a barrier
at grade between lots, between a lot and a street or alley, or between
portions of a lot or lots. A "screen fence" in contra-distinction
to a solid fence, is any fence that affords visibility at right angles
to any surface of such fence of 50 percent or more. |
Fill |
is any act by which earth, sand,
gravel, rock or any other material is deposited, placed, replaced,
pushed, dumped, pulled transported or moved by man or machine to
a new location and shall include the conditions resulting thereof. |
Filling
Pump |
is a pump used to supply water
to the gravity or pressure tanks of a sprinkler system |
Finish,
Interior
Wall
and
Ceiling |
is defined as those materials
applied over wall, partition, and ceiling constructions on the inside
of a building, or subdivision thereof, including finishing utilized for
decoration, acoustical correction, surface insulation and similar
purposes. Wall finishes and ceiling finishes are not exceeding 10
percent of the wall or ceiling area, respectively, shall be
classified as interior trim. Surface decoration consisting of
paint, paper, or similar surface treatment applied directly to the
finish without intervening air space shall not be considered as part of
interior wall and ceiling finish, unless such surface treatment is
required for the purpose of increasing fire resistance |
Finishing
Processes |
are location where paints,
lacquers, or other flammable solvents or thinners are used or when
readily ignitable deposits or residues from such paint, lacquers, or
finishes may occur. |
Fire
Alarm
System,
Automatic |
is a system which automatically
detects a fire condition and actuates a fire alarm signal device |
Fire Alarm
System, Manual |
is an interior alarm system composed of
sending stations and signaling devices in a building, operated on an
electric circuit so arranged that the operation of any one station will
ring all signals throughout the building or at one or more approved
locations. Signals may be either non-coded or coded to indicate
the floor area in which the signal originated, and may be transmitted
to an outside central station. |
Fire
Alarm
System,
Standard |
is a manually operated fire
alarm system equipped with automatic detectors, meeting the
requirements of this ordinance. Such system shall be installed in
a building for the purpose of notifying the occupants of the building
of conditions due to fire or other cause which necessitates that
the building be vacated immediately by the occupants. Such system
and all equipment and devices used in the installation of such a system
shall be tested by and bear the label of approval of Underwriter's
Laboratories Inc. The workmanship equipment and quality of
installation shall conform to the electrical requirements of this
ordinance |
Fire
Area |
is the floor area enclosed and
bounded by fire walls or the exterior walls of a building |
Fire Assembly |
is the assembly of a fire door,
fire window, or fire shutter, including all required hardware,
anchorage, door frames and sills |
Fire
Damper |
is an approved automatic or
self-closing incombustible barrier designed to prevent the passage of
air, gases, smoke or fire through an opening, a duct or pleum chamber |
Fire
Division |
is the interior means of
separation of one part of a floor area from another part, together with
fire-resistive floor construction to form a complete fire barrier
between adjoining or superimposed floor area in the same building or
structure. |
Fire
Door |
is a door and its assembly, so
constructed and assembled in places as to give specified
protection against the passage of fire |
Fire
Escape |
is an exterior vertical exit
used primarily as an emergency means of egress |
Fire
Extinguisher, Standard |
is a portable fire extinguisher which
bears the label of approval of Underwriter's Laboratories Inc. |
Fire
Pump |
is a pump used for
supplying water to a sprinkler system or to an inside standpipe system
at the pressure required by the system |
Fire
Resistance |
as applied to building materials
and construction means the ability withstand fire or give protection
from it for given periods under prescribed test conditions, according
to Standard Fire Test |
Fire-Resistive
Construction
|
is that construction in which
all structural elements, including walls, bearing partitions, floors,
ceiling, roofs and their supports are of incombustible materials,
providing fire resistance as specified in this ordinance |
Fire-
Resistive
Rating |
is the degree of fire resistance
of a fabricated unit or assembly of units of construction, determined
by an approved standard fire test expressed in hours and/or
fractions of an hour. |
Fixture
Branch |
is a pipe connecting several
plumbing fixtures |
Fixture
Drain |
is the drain from the trap
of a plumbing fixture to the junction of that drain with any other
drain pipe |
Fixture
Supply |
is a a water supply pie
connecting the plumbing fixture with the fixture branch |
Fixture
Unit |
is a quantity in terms of which
the load-producing effects on the plumbing system of different kinds of
plumbing fixtures are expressed on some arbitrarily chosen scale |
Fixture
Unit
Flow
Rate |
is the total discharge flow in
gallons per minutes of a single plumbing fixture divided by 7.5, which
provides the flow rate of that particular plumbing fixture as a unit
of flow. Fixtures are rated as multiples of this unit of
flow |
Flameproof
for
Flameproofing
|
refer to materials which
will not readily ignite and will not propagate flame under test
conditions. Flameproofed materials are usually combustible
materials with the addition of some treatment or coating to modify
their burning properties. Flameproof denotes a lower degree of
resistance than fire-retardant |
Flame
Spread |
is the propagation of
flame over a surface |
Flame
Spread
Rating |
is the measure of flame spread
on the surface of materials or their assemblies, as determined by tests
conducted in accordance with ASTM Designation: E84 |
Flammable |
refers to any material which is
very easily ignited and burns with unusual rapidity. The form or
condition of a material, as well ass its inherent properties, affects
flammability, e.g. fine dry wood shavings would be considered
flammable, whereas a large solid piece of wood would not.
Flammable is used in a general sense without reference to specific
limits of ignition temperature, flash point, or other properties |
Flammable
Anesthetics |
are gases or vapors such as
cyclopropane, divinyl ether, ethyl chloride, ethyl ether, and ethylene
which my form flammable or explosive mixtures with air, oxygen or
nitrous oxide |
Flammable
Liquid |
is any liquid having a flash
point below 200 deg. F. and having a vapor pressure not exceeding 40
pounds per square inch (absolute) at 100 deg F. Flammable liquids shall be divided into three classes as follows: Class I shall include those having flash points at or below 20 deg F. Class II shall include those having flash points above 20 deg F but at or below 70 deg F. Class III shall include those having flash points above 70 deg. F. The volatility of flammable liquids is increased when artificially heated to temperature equal to or higher than their flash points. When so heated Class II and III liquids shall be subject to the applicable requirements fro Class I or II liquids. These standards may also be applied to high flash point liquids when so heated even though these same liquids when not heated are outside of its scope. |
Flammable
Refrigerant |
is any refrigerant that will
burn when mixed with air |
Flash
Point |
is the minimize temperature in
degrees Fahrenheit at which a flammable liquid will give off flammable
vapor as determined by appropriate test procedure and below 175 deg F.
(79 deg. C) shall be undermined in accordance with the Standard Method
of Test for Flash Point by means of the Tag Closed Tester, A.S.T.M.
D56. The flash point of dance with the Standard method of Test
for Flash int by means of the Pensky-Martens Closed Tester, A.S.T.M. D93 |
Flight
of
Steps |
is a series of steps between
successive landings or between a landing and a floor |
Flood |
is a temporary increase in
normal water level (surface water elevation) that results in water
inundating land or other surfaces not normally under water. |
Flood
Frequency |
A period of years, based on a
statistical analysis, during which a flood of a stated magnitude may be
expected to be equaled or exceeded. |
Flood
Insurance
Rate
Map
(FIRM) |
An examination and evaluation of
hydrologic and hydraulic data sponsored by the Federal Insurance
Administration to determine base flood flows, elevations, areas and
floodways. The FIS also determines flows, elevations and areas of
flood having less and greater frequencies of occurrence |
Flood
Level
Rim |
is the top edge of receptacle on
a plumbing fixture from which water overflows |
Flood
of
Record |
An actual historical flood event
for which sufficient records are available to establish its
extent. No uniform probability of occurrence is associated
with floods of record. However, the probability of occurrence may
be determined for the event at specific locations |
Flood
Plain |
is a the continuous area
adjacent to a lake, stream or stream, bed, the elevation of which is
greater than the normal water level (surface water elevation) or pool
elevation but equal to or lower than the flood base elevation.
Natural depressions and storm water retention or detention areas which
periodically are inundated by storm water shall be considered of
flood plain, if so designated by the County or an agency appointed by
the County. Also, any land of higher elevation than the
flood base elevation but having an area less than the minimum
residential lot size established for the zone in which it is located,
and surrounded by lands having an elevation equal to or less than the
flood base elevation, shall be considered flood plain. The flood
plain comprises both the "floodway" and floodway fringe. |
Flood
Profile |
Graphical representations of the
elevations of the water surface of the 100 year flood along the
watercourses of unincorporated Cook County. |
Floodproofing |
Modifications to structures made
to reduce flood damages. These changes may be made to existing
structures or incorporated in the design of new structures. In
all instances, floodproofing must be watertight and must be adequate
with out the need for human intervention |
Flood
Protection
Elevation |
The elevation to which uses
regulated b this ordinance are required to be elevated or floodproofed |
Flood
Return
Period
|
A period of years based on a
statistical analysis, during which a flood of a stated magnitude may be
expected to bed equaled or exceeded. |
Flood
Table
Land |
is the continuous land area
adjacent to the flood plain, having an elevation no greater than two
(2) feet nor less than one (1) foot above the base flood elevation. |
Floodway |
A "floodway" is the channel of
watercourse and those portions of the adjoining floodplains which are
required to carry and discharge the 100 year flood with no
significant increase in the base flood elevation. |
Floodway
Encroachment
Lines |
The lateral boundaries of the
floodway which separate it from the floodway fringes |
Floodway
Fringe |
is that portion of the flood
plain which is immediately adjacent to the floodway. Although,
this area is prone to flooding, it is not used to transport flood water
flows. The highest elevation of the floodway fringe is
coterminous to the highest elevation of the flood plain. |
Floor
Area
|
(as applied to area limitations)
is the sum of the gross horizontal area of the several floors of the
building, measured from the exterior faces of the exterior walls or
from the center line of walls separating two (2) buildings. The
"floor area" of the building shall include elevator shafts and
stairways at each floor, penthouse, attic space having headroom of
seven (7) feet, six (6) inches or more, interior balconies and
mezzanines, enclosed porches and floor space used for mechanical
equipment, (except equipment, open or enclosed, located on the
roof). However, basement floor area unless specifically included
shall be excluded from the determination of "floor area" |
Floor
Area |
(as applied to occupancy content) a. Gross Floor Ares is the area in square feet of any individual story of a building including the area within the perimeter of the outside walls of the building or section under consideration, with no deduction for elevators, stairs, mechanical shafts, closets, columns or wall thickness, for the purpose of determining exit facilities or classification of occupancy by the number of occupants b. Net Floor Area is the area in square feet of any individual story of a building exclusive of elevators, stairs, mechanical shafts, closets, columns, and thickness of walls or other similar accessory unoccupied areas. |
Floor
Area
Ratio |
(as established in the Cook
County Zoning Ordinance) of the building or buildings on any zoning lot
is the floor area of the building or buildings on that zoning for
divided by the area of such zoning lot, or in the case of planned
developments, by the net site area. |
Floor
Area
Ratio
Method |
is a method of providing natural
lighting or ventilation openings as a percentage of the floor area of
the spaces served by such openings |
Flue |
is an enclosed passageway used
for the removal of the products of combustion |
Flush
Valve |
is a device located at the
bottom of the tank for the purpose of flushing water closets and
similar fixtures |
Flushometer
Valve |
is a device which discharges a
predetermined quality of water to fixtures for flushing purposes and is
actuated by direct water pressure |
Foundation
Pier |
is a subsurface structure for
the support of columns, above-ground piers or other concentrated loads,
extending from the surface of the ground downward to suitable bearing |
Foundation
Wall |
is a wall below the floor
nearest grade, serving as a support for a wall, pier, column, or other
structural part of a building or structure |
Foyer |
is a room adjoining the
auditorium of a theater or other place of assembly, and serving as the
principle entrance to any seating level thereof. |
Freeboard |
An increment of elevation added
to the base flood elevation to provide a factor of safety for
uncertainties in calculations, unknown localized conditions, wave
actions and unpredictable effects such as may be caused by ice or
debris jams. |
Friction
Type
Connection |
is a high strength bolt
connection in which bolts do not bear on their shanks but serve
primarily to exert pressure on two (2) members of a connection held in
contact by the bolt |
Furnace,
Forced
Air |
is a fuel burning device which
supplies heat o a body of air moving through it by a motor driven fan
or blower and to which ducts are connected for the purpose of conveying
the heated air to the space to be heated. |
Fusible
Plug |
is a device having a
predetermined temperature fusible member for the relief of pressure |
Garage |
is a building in which one or
more motor vehicles are stored, housed, kept, repaired or serviced |
Garage,
Private |
is a garage for four (4) or less
passenger motor vehicles with no provision for repairing or servicing
such vehicles for profit |
Garage,
Public
or
Commercial |
is a building or structure used
for the storage, servicing or repair of motor vehicles and not included
in the term "garage, private" |
Gas
Vent |
is a flue for removing products
of combustion from gas appliances |
General
Alarm |
is an alarm signal sounded on
all alarm sounding devices throughout the building |
Generator |
is a device, equipped with a
heating element, used in a refrigerating system to increase the
pressure of refrigerant in its gas or vapor state for the purpose of
liquefying the refrigerant |
Geodesic
Dome |
is a dome-like structure having
triangulated ribs and commonly referred to in engineering terminology
as a geodesic dome |
Grade,
Natural |
is the elevation of the ground
surface that existed prior to any known changes caused or made by man |
Grade,
Existing |
is the elevation of the surfaces
of the existing ground features (including pervious and impervious
surfaces) before any new excavation filling, construction or any other
changes or alterations are made. |
Grade,
Finished |
is the elevation of the surfaces
of the ground features, after they have been changed or altered as a
result of new work such as excavation, filling, sodding, paving
or any other construction. |
Grade
(Lumber) |
refers to the classification of
lumber in regard to strength and utility. |
Gravity
Tank |
is a container holding water to
supply a sprinkler system at gravity pressure |
Grease
Interceptor |
See Interceptor |
Grease
Trap |
See Interceptor |
Group |
is mortar to which sufficient
water has been added to make a consistency that will flow without
segregation of the ingredients |
Grouted
Masonry |
is masonry in which the
interior, joints are filled by pouring grout therein as the work
progresses |
Habitable
Room |
is a room occupied by one or
more persons for living, sleeping eating, or cooking and includes
kitchens serving dwelling units, but does not include bathrooms, water
closet compartments, laundries, pantries, storage rooms or below grade
recreation rooms |
Hall,
Vestibule
or
Foyer in a Residence |
is a room or passageway at the
entrance of a house or apartment |
Handrail |
is a member at approximately
waist height, paralleling the slop of a stairway or ramp, used to aid
persons in ascending or descending such stairs or ramp |
Hangar |
is a building or structure
designed or used for the shelter, storage or servicing of one or more
aircraft |
Hazardous
Chemical |
is any chemical listed as
hazardous in Hazardous Chemical Data NFPA No. 49, plus chemicals not
mentioned, having similar toxic, explosive and flammable hazardous
properties under similar conditions. The Building Commissioner
shall have the right to make determinations as to which chemicals are
hazardous |
Header |
See Bonder |
Heating
System,
Forced
Air |
is a central warm air heating
system that is equipped with a fan or blower which provides the primary
means for the circulation of air |
Heating
System,
Forced
Hot Water |
is a central hot water system
consisting of boiler, pipes, radiation, equipped with pump or pumps
which provide positive circulation of hot water throughout the system |
Heating
System,
Gravity |
is a central warm air heating
system through which air is circulated by gravity. Wall furnaces
and floor furnaces shall not be considered "gravity heating
systems" under this definition |
Heating
System,
Gravity |
is a central warm air heating
system through which air is circulated by gravity. Wall furnaces
and floor furnaces shall not be considered "gravity heating
systems" under this definition |
Heating
System,
Gravity
Hot Water |
is a central hot water system
consisting of boiler, pipes and radiation through which heated water is
circulated by gravity. |
Heating
System,
Gravity
Hot Water |
is a central hot water system
consisting of boiler, pipes and radiation through which heated water is
circulated by gravity |
Heating
System,
Steam |
is a central heating system
consisting of boiler, piping and radiation where steam generated in the
boiler is circulated through the system piping and radiation either by
pump or gravity flow |
Heat
Pump |
is a refrigeration system
arranged to provide either heating or cooling |
Helicopter
Landing
Pad |
is an area designed solely for
the landing and take-off of rotary wing aircraft and other aircraft
capable of approximately vertical landing and take-off, and
providing no facilities for storage, servicing, or repair of such
aircraft. |
Helicopter
Landing
Pad,
Elevated |
is an area located on a building
or structure one or more stories above ground level, designed solely
for the landing and take-off of the above-mentioned aircraft |
Heliport |
is an area, located on land or
water, but not upon a building, designed for the landing and take-off
of rotary wing aircraft and other aircraft capable of
approximately vertical landing and take-off and providing facilities
for the storage, servicing and repair of such aircraft. One or
more subgrade levels of use pertinent to the heliport operation may be
located beneath such landing and take-off area. |
Highly
Flammable
Solid |
shall include a solid substance,
other than one classified as an explosive which is liable to cause
fires through friction, through absorption of moisture, through
spontaneous chemical changes, or as a result of retaining heat from
manufacturing or processing. |
Highly
Toxic
Material |
is a material so toxic to man as
to afford an unusual hazard to life and health during fire-fighting
operations. Examples are: parathion, TEPP (tetraethyl phosphate),
HETP (hexaethyl tetraphosphate) and similar insecticides and pesticides. |
High
Side |
refers to those parts of a
refrigeration system under condenser pressure or higher |
Hoistway,
Elevator
or
Dumbwaiter |
is a shaftway for the travel of
one or more elevators or dumbwaiters. It includes the pit and
terminates at the underside of the overhead machinery space floor or
grating, or at the underside of the roof where the hoistway does
not penetrate the roof a. Multiple Hoistway a hoistway for more than one elevator or dumbwaiter b. Single Hoistway A hoistway for more than one elevator or dumbwaiter |
Hoistway
Enclosure |
is the fixed structure,
consisting of vertical walls or partitions which isolates the hoistway
from all other parts of the building or from an adjacent hoistway, and
in which the hoistway doors and door assemblies are installed |
Hold-Out
Area
(Reservoir
Parking) |
is that area of an open air
drive-in theater used exclusively for holding cars which are awaiting
admittance into the auditorium area of the theater |
Hollow
Masonry
Unit |
is a masonry unit whose net
cross-sectional area in any plane parallel to the bearing surface is
less than 75 percent of its gross cross-sectional area measured in the
same plane. |
Hood |
is that portion of a local
exhaust ventilation system which confines hot gases or air-contaminants
at the point of emission and guides them into the duct work of the
system |
Horizontal Branch (Plumbing) |
is a drain pipe extending
laterally from a soil or waste stack or building drain with or without
vertical sections or branches, which receives the discharge from one or
more plumbing fixture drains and conducts it to the soil or waste stack
or to the building (house) drain. |
Horizontal
Pipe |
is any pipe or fitting which
makes an angle of more than 45 degrees with the vertical |
Hospitals |
A building or part thereof used
for medical, psychiatric, obstetrical or surgical care on a 24 hour
basis, for 4 or more inpatients. Hospital, wherever used in this
ordinance, shall include general hospitals, mental hospitals,
tuberculous hospitals, children's hospitals and any such facilities
providing inpatient care. |
Hotel
or
Motel |
is an establishment which is
open to transient guests, in contra-distinction to a lodging house or
apartment house and is commonly known as a hotel or motel in the
community in which it is located; and which provides customary hotel or
motel services, such as maid service, furnishing and laundering of
linen, telephone and secretarial or desk service, and the use and
upkeep of furniture. For the purpose of this ordinance, hotels
and motels shall b classified as "Multiple-Family Dwellings". |
Humanly-Occupied
Space |
is space normally frequented or
occupied by people but excluding machinery rooms and walk-in coolers
used primarily for refrigerated storage. |
Hydrostatic
Pressure |
The upward pressure exerted on
floor slabs or an entire structure by standing water or groundwater,
which tends to float a structure or crack the floor. It is based
on the difference in elevation between the surface level of the water
and the structure on which it is acting. Hydrostatic pressure may
also be horizontal, imposing forces on walls causing them to crack or
fail |
Incombustible
Construction |
is that construction in which
all structural elements including walls bearing partitions, floors,
ceilings, roofs and their supports are of incombustible materials, but
which are generally not fire protected |
Incombustible
Material |
implies material which does not
in itself constitute an active fuel for the spread of combustion.
A material which will no ignite nor actively support combustion during
an exposure for five (5) minutes to a temperature of 1200 degrees
Fahrenheit shall be designated "incombustible". In
addition, materials having a structural base of incombustible material
(as defined herein) with a surfacing not more than one-eighth (1/8)
inch thick which has a flames-spread rating not greater than 15 when
tested in accordance with the method of test for surface burning
characteristics of building materials (ASTM Designation: E84) shall be
acceptable as "incombustible". The term combustible does not
apply to the flamespread characteristics of interior finish or trim
materials. No material shall b classed as incombustible material
which is subject o increase in combustibility or flamespread rating
beyond the limits herein established through the effects of age,
moisture or other conditions. |
Indirect
Closed
--
Surface Refrigeration System |
is one in which a liquid, such
as brine or water, cooled by an evaporator located in an enclosure
external to a refrigerated room , is circulated to and through such a
refrigerated room in pipes or other closed circuits |
Indirect
Open
--
Spray Refrigeration System |
is one in which a liquid, such
as brine or water, cooled by an evaporator located in an enclosure
external to a refrigerated room, is circulated to such refrigerated
room and is sprayed therein |
Indirect
Refrigeration
System |
is one in which liquid such as
brine or water cooled by the refrigerant, is circulated to the material
or space refrigerated, or is used to cool air so circulated |
Indirect
Vented
Closed-Surface
Refrigeration System |
is one in which a liquid, such
as bring or water, cooled by an evaporator located in a vented
enclosure external to a refrigerated room, is circulated to and through
such refrigerated room in pipes or other closed circuits. |
Indirect
Waste
Pipe |
is a pipe that does not connect
directly with the drainage system but conveys liquid wastes by
discharging into a plumbing fixture or receptacle which is
directly connected to the drainage system |
Individual
Vent
(Plumbing) |
is a pipe installed to vent a
fixture trap and which connects with the vent system above the fixture
served or terminates in the open air |
Individual
Wastes |
are liquid wastes resulting from
the processes employed in industrial establishments and are free of
fecal matter. |
Industrial
Refrigeration
System |
is a refrigerating system used
in the manufacture, processing, or storage of materials located in a
building used exclusively for industrial purposes |
Interceptor
(Plumbing) |
is a device designed and
installed so as to separate and retain deleterious, hazardous, or
undesirable matter from normal wastes and permit normal sewage or
liquid wastes to discharge into the disposal terminal by gravity |
Interior
Trim |
shall include moldings,
cornices, wainscoting, and other wall and ceiling finishes not
exceeding 10 percent of the wall are nor 10 percent of the ceiling area
of a room or space, excluding doors and frames, and window sash and
frames |
Interior
Wall
and
Ceiling Finishes |
See Finish, Interior |
Internal
Gross
Volume |
is the volume as
determined from internal dimensions of the container with no
allowance for volume of internal parts |
Irritant
Refrigerant |
is a any refrigerant that has an
irritating effect on the eyes, nose, throat, or lungs |
Lake |
is any natural or man-made body
of water surrounded by land |
Landing
(Stair) |
is a platform between two (2)
flights of stairs |
Lender
(Downspout)
|
is the water conductor
from the roof to the building storm drain, combined building sewer, or
other means of disposal |
Light
Gauge
Formed
Steel Members |
are structural members formed to
shape from sheet or strip steel less than three sixteenths (3/16
inch thick, generally used for studs, floor joists, arch ribs, rafters
or decks |
Lightweight
Metal
Alloys |
are magnesium and aluminum alloys |
Limited
Charge
System |
is a refrigeration system in
which, with the compressor idle,the internal volume and total
refrigerant charge are such tat the design working pressure will not be
exceeding by complete evaporation of the refrigerant charge |
Lintel |
is the structural member placed
over an opening in a wall, and supporting the wall construction above |
Liquid
Receiver |
is a vessel permanently
connected to the high pressure side of a system for the storage of
refrigerant |
Liquid
Waste |
is the discharge from any
fixture, appliance, or appurtenance, in connection with a plumbing
system which does not receive fecal matter |
Liquefied
Petroleum
Gases:
LPG and LP |
Gas shall include any material
which is composed predominantly of any of the following hydrocarbons,
or mixtures of them; propane propylene, butanes (normal butane or iso
butane) and butylenes. |
Live
Load |
is the weight superimposed by
the use and occupancy of the building or structure, not including the
wind load, snow load, earthquake load or dead load |
Load,
Dead |
is the weight of all permanent
construction, including framing, walls, floors, roofs, partitions,
stairways and all fixed service equipment |
Load
Factor
(Plumbing) |
is the percentage of the total
connected fixture unit flow rate which is likely to occur at any point
in the drainage system. It varies with the type of occupancy, the
total flow unit above this point being considered, and with the
probability factor of simultaneous use |
Load,
Impact |
is the load resulting from
moving machinery, elevators, craneways, vehicles, and other similar
forces and kinetic loads. |
Load,
Lateral
Soil |
is the lateral pressure exerted
by the weight of the adjacent soil, including due allowance for
hydrostatic pressure |
Load,
Wind |
is the lateral pressure on the
building or structure exerted by the wind |
Lobby |
is the enclosed vestibule
between the principle entrance to the building and the doors to the
main floor of the auditorium or assembly room of a theater or place of
assembly or to the main floor corridor of a business building. |
Local
Ventilating
Pipe
(Plumbing) |
is a pipe on the fixture side of
the trap, through which vapor or foul air is removed from a room
or fixture |
Lodge
Hall |
is a hall or meeting place of a
local branch of a fraternal order or society such as the Masons,
Knights of Columbus, Moose, American Legion and other similar
organizations |
Lodging
House |
is a building originally
designed for or sued as a single-family or two-family dwelling, all or
a portion of which contains lodging rooms which accommodate persons who
are not members of the keeper's family. Lodging or meals or both,
are provided for compensation on a weekly or monthly basis. |
Loop
Vent
(Plumbing)
|
is the same as a circuit vent
except that ti loops back and connects with a stack vent instead of a
vent stack |
Lot |
is a zoning lot as defined
herein, except as the context shall indicate a lot of record, in which
case a "lot" is a lot of record |
Lot
of
Record |
is a lot which is part of a
subdivision, the plat of which has been recorded in the office of the
Recorder of Deeds of Cook County; or a parcel of land, the deed to
which was recorded in the office of said Recorder prior to the adoption
of the Cook County Zoning Ordinance |
Lot
Area,
Gross |
is the area of a horizontal
plane bounded by the front, side and rear lot lines, but no including
any area occupied by the waters of a duly recorded lake or river |
Lot,
Corner |
is a lot situated at the
intersection of two (2Z) streets, the interior angle of such
intersection not exceeding 135 degrees |
Lot,
Depth |
is the mean horizontal distance
between the front lot line and the ear lot lines, measured within the
lot boundaries |
Lot
Line,
Exterior |
is a boundary line between a lot
and a street, alley, public way or railroad right-of-way |
Lot
Line,
Front |
shall be that boundary of a lot
which is along an existing or dedicated public street or where no
public street exists, is along a public way is not a dedicated street
the right-of-way of such public way shall be deemed to be 66 feet,
unless otherwise provided. The owner of the corner lot may select
either street lot line as the front lot line |
Lot
Line,
Interior |
is a boundary line between two
(2) adjoining lots |
Lot
Line,
Rear
|
shall be that boundary of the
lot which is most distant from, and is, or is most nearly, parallel to
the front lot line |
Lot,
Through |
is a lot having a pair of
opposite lot lines along two substantially parallel streets, and which
is not a corner lot. On a "through lot" both street lot lines
shall be deemed front lot lines. |
Lot,
Width |
is the mean horizontal distance
between the side lot lines of a lot, measured within the lot boundaries |
Lot,
Zoning |
is a single-tract of land
located within a single block, which (at the time of filing for
building permit) is designated by its owner or developer as a tract to
be used, developed or built upon as a unit, under single ownership or
control. Therefore, a "zoning lot or lots" may or may not
coincide with a lot of record. |
Low
Side |
refers to those parts of a
refrigeration system at or below evaporator pressure |
Machinery
(Refrigeration) |
is a room other than a
boiler room, in which a refrigerating system is permanently installed
and operated but not including evaporators located in a cold storage
room, refrigerator box, air cooled space, or other enclosed
space. Closets solely contained within, and opening only into a
room shall not be considered machinery room but shall be considered a
part of the machinery room in which they are contained or open
into. It is not the intent of this definition to cause the space
in which a self-contained system is located to be classified as a
machinery room. |
Machinery
Room
Class
T (Refrigeration) |
is a room having machinery, but
no flame producing apparatus, permanently installed and operated and
also conforming to the following: a. Any doors, communicating with the building, shall be approved self-closing tight fitting Class B fire doors b. Walls, floor and ceiling shall be eight and of not less than one-hour fire resistive construction c. Exterior openings, if present shall not be under any fire escape or any open stairway d. All pies piercing the interior walls, ceiling, or floor of such room shall be tightly sealed o the walls, ceiling or floor through which they pass e. Emergency remote controls to stop the action of the refrigerant compressor shall be provided and located immediately outside the machinery room. |
Magazine |
is any building or structure
used for the storage of explosives |
Main |
of any system of continuous
piping is the principle artery of the system, to which branches
may be connected. |
Main
Vent
(Plumbing)
|
is the principle artery of the
venting system to which vent branches may e connected |
Marine
Service
Station |
is that portion of the property
where flammable liquids used as motor fuels are stored and dispensed
from fixed equipment on shore piers, wharves, or floating docks into
the full tanks of motor craft |
Marquee |
is a roof-like structure of a
permanent nature which projects horizontally from the wall of a
building and derives its support from said building |
Marquee
Sign |
is a display sign attached to,
or hung from, mar marquee |
Masonry |
is a built-up construction or
combination of building units of such materials as clay, shale,
concrete, glass, gypsum or stone, set in mortar; or plain concrete |
Mechanical
Joint
(Refrigeration) |
is a gas-tight joint, obtained
by the joining of metal parts though a positive-holding mechanical
construction |
Mechanical
Ventilation |
is the process of supplying or
removing air, by mechanical means to or from any space |
Mezzanine |
is an intermediate or fractional
story between the floor and ceiling of any story of a building, used
for a purpose accessory to the principle use, and extending over only
part of such floor. |
Mixed
Occupancy |
refers to a building designated
or used for two (2) or more occupancies representing different
occupancy classifications |
Mixer |
is a vessel or device for the
mixing of refrigerant or other liquids with another substance. |
Mortar |
is a plastic mixture of
cementitious materials, fine aggregates, and water used to bond masonry
or other structural units |
Motel |
See Hotel |
Motion
Picture
Trial
Exhibition Room |
is a room used to preview, edit
or view motion pictures, with a limited audience of 20 or less
persons,m and without charge to the audience |
Motor
Vehicle
|
is any passenger vehicle, truck,
truck-trailer, trailer or semi-trailer propelled or drawn by a
mechanical power |
Moving
Stairway |
is a moving inclined continuous
stairway or runway for raising or lowering passengers |
Multiple
System |
is a refrigeration system
employing the direct system of refrigeration in which the refrigerant
is delivered to two (2) or more evaporators in separately refrigerated
spaces |
Natural
Barricade |
is a natural feature of the
ground, such as a hill or timber of sufficient density that the
surrounding exposures which require protection cannot be seen from a
magazine when the trees are bare of leaves. |
Newel
Post |
is an upright post at the end of
a stair-railing |
Non-Positive
Displacement
Compressor |
is a compressor in which
increase in vapor pressure is attained without changing the
internal volume of the compression chamber |
Normal
Loading
(of
Wood) |
is a design load that
stresses a member or fastening to the full allowable stress
tabulated in this ordinance. This loading may be applied for
approximately 10 years, either continuously or cumulatively and 90
percent of this load may be applied for the remainder of the life of
the structure |
Nursery
Day |
See Child Day Care Center |
Nursery
School |
See Child Day Care Center |
Nursing
Home |
A building or part thereof used
for the lodging, boarding and nursing care on a 24-hour basis for
4 or more persons who, because of mental or physical incapacity, may be
unable to provide for their own needs an safety without the assistance
of another person. Nursing home, wherever used in this ordinance,
shall include nursing and convalescent homes, skilled nursing
facilities, intermediate care facilities, and infirmaries or homes for
the aged. |
Occupancy |
is the use of any building or
structure, for any one of, or combination of, the following purposes;
residential, institutional, assembly, educational, office, commercial,
industrial, storage, high hazard , or unclassified, as established in
Article VI, CLASSIFICATION OF BUILDINGS |
Occupancy
Content |
is the maximum allowable number
of persons occupying a building floor, room, or space; the maximum
number of persons to be provided for on any floor or part thereof shall
be in accordance with the actual occupancy for which the floor or part
thereof is designed, as prescribed in this ordinance |
Occupied |
(as used to determine exit
requirements) refers to the presence of persons in a building or space
for normal purposes, subject to ruling by the Building Commissioner in
case of doubt as to whether an area is occupied. Examples:
a crawl space under a building is not an occupied space even though on
occasion a plumber may enter to repair pipes. However, an open
space under a building regularly used for storage purposes, or by
children at play, is occupied. A department store occupancy do
not necessarily need to be kept unlocked. However, as a place of
employment the building is still occupied and under the general
provisions of this ordinance sufficient exits may be kept available for
use to provide for the number of employees actually present. |
Offset |
in a line of piping is a
combination of elbows or bends which brings one section of the pipe out
of line but into a line parallel with the other section |
One
hundred
Year
Flood |
A flood magnitude with a one
percent statistical chance of being equaled or exceeded during any
year. A flood this large would be reached once during a 100 year
period, on the average. However, the occurrence of such an event
does not diminish the chance of its reoccurring again at any time |
Open
Air
Parking
Structure |
is an unenclosed or partially
enclosed structure which is at least 50 percent open on two (2) or more
sides an is used exclusively for the parking or storage of passenger
motor vehicles |
Open
Space |
is a street, alley, waterway,
park, yard, court or other permanent unobstructed space open to the sky |
Open
Web
Steel
Joists |
are open web, load-carrying
shop-fabricated, truss type secondary structural steel members |
Ordinary
Construction |
is that construction, other than
heavy timber construction, in which the structural elements of the
interior framing are entirely or in part of wood or other elements not
more combustible than wood, and the exterior structural elements are
composed of masonry or other incombustible materials. Ordinary
construction is listed as constructed type IV in this ordinance |
Ordinary
Materials |
are materials meeting the
requirements of this ordinance for minimum strength, durability and
fire resistance for materials, without special selection, testing and
supervision as required for "Controlled Materials". See Article
IV, Section 4.6. |
Oriel
Window |
is a window projected beyond and
suspended from the wall of the building, or cantilevered therefrom. |
Overhead
Sewer |
A plumbing system which
incorporated a device or apparatus by which sewage, liquid waste or
other water-borne waste is lifted by mechanical or other means for
further discharge into the building sewer and conveyance to the
receiving sewer system |
Overhead
Structure |
is all of the structural
members, platforms, etc., supporting elevator machinery, sheaves, and
equipment at the top of a hoistway |
Oxidizing
Material |
includes substances such as
chlorates, permanganates, perosides or nitrates, that yield oxygen
readily to stimulate combustion |
Panel |
is the section of a floor or
wall contained between the supporting frame of two a(2) adjacent rows
of columns and girders or column bands of floor construction |
Parapet,
Roof |
is that part of any wall
entirely above the roof line and designed primarily to deter the spread
of fire from building to building |
Partition |
is a vertical separating
construction between rooms or spaces; such partition, being not over
one story in height |
Partition,
Bearing |
is a partition used to support
loads other than its own weight |
Patient
Care
Facility |
is a building designed or used
for the temporary or permanent housing of persons who require medical,
mental, physical or emotional care and treatment |
Passageway
(Hallway,
Grade) |
is an enclosed hallway, exitway
or corridor connecting an exit to a street or to an open space or court
communicating with a street |
Penthouse |
is an enclosed structure on or
above the roof of a building -- other than a "roof structure" -- used
primarily for living or recreational accommodations. Penthouses
occupying an aggregate area exceeding one-third (1/3) of the roof area
shall be considered a story of the building and shall be subject to all
applicable requirements of this ordinance |
Permit |
is an authorization by the
Building Commissioner to proceed with construction, alteration,
installation or demolition |
Person |
includes any individual or group
of individuals, corporation, partnership, trust, association or any
other organized group of persons, including governmental agencies. |
Pier |
is an isolated column of masonry
or concrete. A bearing wall not bonded at the sides into
associated masonry shall be considered a pier when its horizontal
dimensions measured at right angles to the thickness does not exceed
four (4) times its thickness |
Piping |
refers to the pipe or tube mains
for interconnecting the various parts of a system |
Plastic |
shall include any of various
non-metallic compounds, synthetically produced (usually from organic
compounds by polymerization), which can be molded into various forms at
some point in their manufacture |
Plastic
Theory
and
Design |
refers to design methods based
upon the ultimate strength of a material and shape, where the
working load is a fraction of the ultimate load |
Plenum
Chamber |
is an enclosed air compartment
for the purpose of retaining and distributing air under pressure |
Plumbing
Fixtures |
are installed receptacles,
devices, or appliances which are supplied with water or which receive
or discharge liquids or liquid-borne wastes, with or without discharge
into the drainage system with which they maybe directly or indirectly
connected |
Plumbing
System |
includes the water-supplying and
distribution pipes; plumbing fixtures and traps; soil, waste, and vent
pipes; building drains and building sewers including their respective
connections, devices and appurtenances within the property liens of the
premises, and water-treating or water using equipment |
Poisonous
Gas |
shall include any noxious gas
of such nature that a small amount of the gas when mixed with air
is dangerous t o life. Examples are chloropicrin, cyanogen,
hydrogen cyanide, nitrogen peroxide and phosgene. |
Position
Indicator |
is a device that indicates the
position of an elevator car in the hoistway. It is
called a hall position indicator when placed at a landing or a car
position indicator when placed in the car |
Positive
Displacement
Compressor |
is a compressor in which
increase in vapor pressure is attained by changing the internal
volume of the compression chamber |
Potable
Water |
is water which is satisfactory
for drinking, culinary and domestic purposes, and meet the requirements
of the Cook County Health Department |
Potentially
Explosive
Chemical |
shall include any chemical
substance, other than one classified as an explosive or blasting agent,
which has a tendency to be unstable and which can be exploded by heat
or shock or a combination thereof |
Pre-Action
System |
is a sprinkler system employing
automatic sprinklers attached to a piping system containing air that
may or may not be under pressure, with a supplemental heat responsive
(thermostatic) system of more sensitive characteristics than the
automatic sprinklers themselves, installed in the same areas as the
sprinklers; actuation of the heat responsive system, as from a fire,
opens a valve which permits water to flow into the sprinkler
piping system an to be discharged from any sprinkler which is open |
Pre-Signal
Alarm |
is an alarm signal sounded on
the pre-signal alarm sounding devices only |
Prefabricated |
means fabricated prior to
erection or installation in a building or structure |
Prefabricated
or
Factory
Assembled Building |
is a completely assemble and
erected building or structure, including the service equipment of which
the structural parts consist of prefabricated individual units or
sub-assemblies using ordinary or controlled materials; and in which the
service equipment may be of either pre-fabricated or at-site
construction |
Pressure
Imposing
Element
(Refrigeration) |
is any device or portion of the
refrigerating equipment used for the purpose of increasing the
refrigerant vapor pressure |
Pressure
Limiting
Device
(Refrigeration) |
is a pressure-responsive
mechanism designed to automatically stop the operation of the
pressure-imposing element at a predetermined pressure. |
Pressure
Relief
Device
(Refrigeration) |
is a pressure-actuated valve or
rupture member designed to automatically relieve pressure |
Pressure
Relief
Valve
(Refrigeration) |
is a pressure-actuated valve
held closed by a spring or other means, and designed to automatically
relieve pressure in excess of its setting |
Pressure
Tank |
is a container holding water to
supply a sprinkler system at a pressure greater than that due to gravity |
Pressure
Vessel |
is a refrigerant-containing
receptacle of a refrigerating system, other than expansion coils,
headers and pipe connections |
Primary
Structural
Member |
is any member of the structural
frame of a building used as a column, grillage beam, girder, beam
framing between columns, beam used to support masonry walls, truss,
isolated lintel spanning eight (8) feet or more and any member required
to brace a column or truss |
Private
or
Private
Use |
in the classification of
plumbing fixtures, applies to fixtures in residences and apartments and
to fixtures in private bathrooms of hotels and similar installations
where the fixtures are intended for the use of a family or an individual |
Private
Sewer |
is a sewer privately owned and
not directly controlled by public authority |
Projection
Block |
is that portion of a theater or
assembly room containing a projection room alone or in combination with
other rooms incidental to its operation |
Property
Room |
is a room used for the storage
of any accessory, materials used in conjunction with a theatrical or
similar performance, except scenery, commonly known and described as
stage properties |
Proscenium |
is the vertical plane of
separation between an auditorium and a stage |
Public or Public Use |
in the classification of
plumbing fixtures, applies to fixtures in general toilet rooms of
schools, gymnasiums, hotels, railroad stations, public buildings, bars,
public comfort stations and other installations (whether pay or free)
where a number of fixtures are installed so that their use is similarly
unrestricted |
Public
Sewer |
is a central sewer directly
controlled by public authority |
Public
Way |
is any sidewalk, street, alley,
highway or other thoroughfare |
Pyroxylin
(Cellulose
Nitrate
Plastic) |
shall mean any plastic
substance, material or compound, other than cellulose nitrate film or
explosives having cellulose nitrate as a base, by whatever name
known, when in the form of blocks, slabs, sheets, tubes or fabricated
shapes. |
Pyroxylin
Plastic
Factory |
is any building or portion of a
building where articles are manufactured in whole or part from
pyroxylin plastics in quantities above 25 pounds |
Pyroxylin
Plastic
Storage
Building |
is any building, not a pyroxylin
factory as defined above, which is used to store pyroxylin plastics,
whether alone or as parts of other objects, in quantities above
25 pounds |
Radioactive
Material |
shall include any material or
combination of material that spontaneously emits radiation |
Railing |
is a member at the edge of a
drop-off, serving the purpose of preventing people from falling over
the edge |
Ramp |
is an inclined passageway
connecting two (2) levels |
Receiver
(Refrigeration) |
is a vessel permanently
connected to a system by inlet and outlet pipes for storage of a liquid
refrigerant |
Refrigerant |
is a substance which produces a
refrigerating effect by its absorption of heat while expanding or
vaporizing |
Refrigerating
System |
is a combination of
interconnected refrigerant-containing parts constituting one closed
refrigerant circuit in which a refrigerant is circulated for the
purpose of extracting heat. |
Refrigeration |
is the process of removing heat
from a substance or an enclosed space of a building or structure |
Refrigerating
System
Commercial |
is a refrigerating system
assembled or installed in building used for business or
commercial purposes. |
Reinforced
Brick
Masonry |
is brick masonry in which steel
reinforcing bars are embedded in such a manner that the two (2)
materials act together in resisting forces |
Reinforced
Concrete |
is concrete in which
reinforcement other than that provided for shrinkage or temperature
changes is combined in such manner that the two (2) materials act
together in resisting forces |
Relief
Vent
(Plumbing) |
is a vent the primary function
of which is to provide circulation of air between drainage and vent
systems |
Remote System (Refrigeration) |
is a refrigerating system in
which the compressor or generator is located in a space other
than the cabinet, fixture or space containing the evaporator |
Repair
|
is the replacement or renewal,
including additions or alterations of any part of a building structure,
device or equipment with like or similar materials or parts for
the purpose of maintenance of such building structure, device or
equipment |
Residential-Custodial Care Facility |
A building or part thereof, used
for the lodging or boarding of 4 or more persons who are incapable of
self-preservation because of age or physical or mental
limitation. This includes facilities such as homes for the aged,
nurseries (custodial care for children under 6 years of age) and
mentally retarded care institutions. Day care facilities that do
not provide lodging or boarding for institutional occupants are not to
be included under this section of the ordinance |
Residential
Restrained
Care
Institutions |
A building or part thereof, used
to house occupants under some degree of restraint or security |
Return
Offset
(Plumbing) |
is a double offset installed so
as to return the pipe to its original alignment. |
Revent
Pipe
(Plumbing) |
(sometimes called an
individual vent) is that part of a vent pipe line which connects
directly with an individual waste or group of wastes, underneath or
back of the fixtures and extends either to the main or branch vent pipe |
Rigid
Frames |
are continuous structural frames
of buildings or structures in which the beam-to-column
connections are assumed to have sufficient rigidity to hold the angles
between intersecting members virtually unchanged |
Riser
(Plumbing) |
is a water supply pipe which
extends vertically one full story or more to convey water to branches
of fixtures |
Riser
(Stair) |
is the vertical surface of a
step between two (2) successive treads or between a tread and a landing
or floor |
Risk
Premium
Rate
Zones |
Zones Flood hazard areas
designated according to the degree of flooding they would experience
during the base flood. The symbols used to designate these zones
are as follows: Zone Sym Description "A" Area of 100 year flood; base flood elevation and flood hazard factors are not determined "A0" Areas of 100 year shallow flooding where depths are between one (1) and three (3) feet; average depths of inundations are shown, but no flood hazard factors are determined "AH" Areas of 100 year flooding where depths are between one (1) and three (3) feet; base flood elevations are shown but no flood hazard factors are determined "A1-A30" Areas of 100 year flood; base flood elevations and flood hazard factors determined "B" Areas between limits of the 100 year flood and 500 year flood; or certain areas subject to 100 year flooding with average depths less than one (1) foot or where the contributing drainage area is less less than one square mile; or areas protected by levees from the base flood (medium shading) |
Riverine |
Relating to, formed by, or
resembling a river (including tributaries), stream, creek or brook |
Roof |
is the roof slab or deck with
its supporting members, not including vertical supports |
Roof
Coverings |
is the covering applied to the
roof for weather resistance or fire resistance |
Roof
Drain |
is a drain installed to receive
water collecting on the surface of a roof and to discharge it
into the leader (downspout) |
Roof
Structure |
is a structure erected above the
roof for supporting or enclosing a stairway or equipment used in the
operation of a building, such as tanks, fans, or elevator machinery,
but containing no habitable space for living or recreational
accommodations |
Roughing-In
(Plumbing) |
is the installation of all parts
of the plumbing system which can be completed prior to the installation
of fixtures. This includes drainage, water supply and vent piping
and the necessary fixture supports. |
Row
of
Seats |
is a group of adjoining seats
arranged side by side |
Rubble |
is any one o the following: a. Coursed Rubble Masonry composed of roughly shaped stones fitting approximately on level beds, well bonded, and brought at vertical intervals to continuous level beds or courses b. Random Rubble Masonry composed of roughly shaped stones, well bonded, and brought at irregular vertical intervals to discontinuous but approximately level beds or courses c. Rough or Ordinary Rubble Masonry composed of non-shaped or field stones laid without regularity of coursing but well bonded |
Runway |
is any aisle or walkway
constructed and maintained as a temporary passageway for pedestrians or
vehicles during construction, demolition or alteration of a building |
Rupture
Member |
in a refrigeration system, is a
pressure relief device having a diaphragm of member which will rupture
or blow out at a predetermined pressure |
Safety
Clearance |
is a space open to the sky,
continuous on all sides of a building or structure, between such
building and any other building, or property line, or the near side of
every adjoining and adjacent public way or public park, or the
right-of-way line of any railway or the shore line, of any navigable
stream or river. Where two a(2) or more of the above apply, the
condition providing the larger safety clearance shall be meant. |
Sanitary
Sewer |
is a pipe which carries sewage
and excludes storm, surface, and ground water |
Scaffold |
is any temporary elevated
platform which is used for supporting workmen, materials, or both |
Sealed
Absorption
System
(Refrigeration) |
is a system in which all
refrigerant containing parts are made permanently tight by welding or
brazing against refrigerant loss |
Sealed
Unit
(Refrigeration) |
is a pressure imposing element
which operates without stuffing box or which does not depend upon
contact between moving and stationary surfaces for refrigerant retention |
Secondary
Structural
Member |
is any member of the structural
framework other than a primary member (see Primary Structural Member)
including joints, and fill-beams framed into other beams or
girders. |
Sediment |
is solid material both
mineral and organic that is in suspension, is being transported or has
been moved from its site of origin by air, water, gravity or ice and
has come to rest on the earth's surface |
Self-Closing
Door |
is one which closes upon release
by the person passing through. A self-closing door may be an
automatic-closing door also, and an automatic-closing door may be
self-closing |
Self-Closing
Fire
Assembly |
is a fire assembly which
is kept in a normally closed position and is equipped with an approved
device to insure closing and latching after having been opened for use |
Self-Closing
Fire
Door |
is one which is kept normally in
the closed position and which if opened is returned to the closed
position by the spring or weight or other closing devices |
Self-Contained
System |
is a refrigerating system the
components of which including the piping or tubing connecting the
components, the motive force therefore and the necessary control,s, are
enclosed in a single enclosure of one or more compartments |
Septic
Tank |
is a watertight receptacle which
receives the discharge of a drainage system or part thereof, and is
designed and constructed so as to separate solids from the liquids,
digest organic matter through a period of detention and allow the
liquids to discharge into a soil outside of the tank through a system
of open-joint or perforated piping or disposal pit |
Sewage |
is any liquid waste containing
animal or vegetable matter in suspension or solution and may
include liquids containing chemicals in solution |
Shaft |
is a vertical opening or
enclosed space extending through two (1) or more floors of a building
or through a floor and a roof. |
Shell
Type
Apparatus
(Refrigeration) |
is a refrigerant-containing
vessel having tubes for the passage of a heating, cooling or
refrigerating
fluid |
Siamese
Connection |
is an inlet fitting installed on
the outside of a building and connected to the system main of a
sprinkler system or to the standpipe main of an inside standpipe system
for the use of the fire department only, to supply water to the
system |
Side Vent (Plumbing) |
is a vent connecting to the
drain pipe through a fitting at an angle not greater than 45 degrees to
the vertical |
Sign
|
is a name, identification,
description, direction, display or illustration which is affixed to, or
represented directly to indirectly upon, a building structure or piece
of land; and which directs attention to an object, project,
place, activity, person, institution, organization or business |
Sign,
Directional |
is a sign that indicates the
direction or location of an exit stairway or fire escape |
Sign,
Exit |
is a sign which is located over
or immediately adjoining a means of egress from a building or structure |
Sign
Facing |
is the opaque or transparent
surface or surfaces of the sign upon, against, or through which the
message of the sign is exhibited |
Sign,
Ground |
is a sign supported by uprights
or braces upon the ground |
Sign,
Outdoor |
shall include all fabricated
signs and their supporting structures erected on the ground or attached
to or supported by a building or structure |
Sign,
Projecting |
is a sign which is attached to a
wall of a building an d projects therefrom |
Sign,
Roof |
is a sign erected on the roof of
a building |
Sign,
Structural
Trim
Of |
shall consist of a molding
batten, cappings, nailing strips, latticing, and platforms which are
attached to a sign structure |
Sign,
Structure |
consists of the supports,
uprights, bracing and framework of the sign |
Sign,
wall |
is a sign which is affixed flat
to, or painted on, a wall of a building. However, incidental
lighting reflectors may project from such wall a distance not exceeding
eight (8) feet, within the meaning of this definition |
Signal
System,
Elevator
Separate |
is one consisting of
buttons or other devices located at the landings, which, when actuated
by a waiting passenger, illuminate a flash signal or operate an
annunciator in the car indicating floors at which stops are to be made a. Signal Device, Elevator Car Flash One providing a signal light in the car, which is illuminated when the car approaches the landings at which a landing signal registering device has been actuated b. Signal Registering Device, Elevator Landing A button or other device, located at the elevator landing, which when actuated by a waiting passenger, causes a top signal to be registered in the car c. Signal Transfer Device, Elevator Automatic A device by means of which a signal registered in a car is automatically transferred to the next car following, in case the first car passe a floor for which a signal has been registered without making a stop d. Signal Transfer Switch, Elevator A manually operated switch, located in the car, by means of which the operator can transfer a signal to the next car approaching in the same direction, when he desires to pass a floor at which a signal has been registered in the car |
Site |
is a lot or parcel of land or a
contiguous combination thereof, where construction work is or is to be
performed |
Skylight |
is a single light-admitting
section of a roof |
Sleeping
Accommodations |
means a room, space or portion
thereof, used primarily for sleeping purposes |
Slidescape |
is a straight or spiral chute
erected on the interior or exterior of a building and which
is designated as a means of human egress to the street or other open
space |
Smoke
Detector |
is a device which will detect
the presence of smoke and which will automatically actuate an alarm or
other device |
Smokepipe |
is a primarily horizontal pipe
or breeching used to convey the products of combustion from a heating
appliance to a flue |
Smokeproof
Tower |
is an enclosed stairway with
access from the floor area of the building either through outside
balconies, landings, or ventilated fire-resistive vestibules, opening
on a street or yard or open court, and with a direct exit or exit
passageway to the street at grade level. |
Smokestack |
is a primarily vertical enclosed
passage, used for the removal of the products of combustion |
Soil
Erosion |
is the detachment and movement
of soil from the land's surface by wind or similar functions with or
without the discharge from other fixtures, to the building drain |
Soldered
Joint |
is a gas-tight joint obtained by
the joining of metallic mixtures or alloys which melt at
temperatures below 1000 deg F. and above 400 deg. F. |
Solid
Masonry |
is masonry consisting wholly of
solid masonry units laid contiguously in mortar or plain concrete |
Solid
Masonry
Unit |
is a masonry unit whose net
cross-sectional area in every plane parallel to the bearing surface is
75 percent or more of its gross cross-sectional area measured in the
same plane |
Special
Industrial
Explosive
Device |
is any explosive power-pack
containing an explosive charge in the form of a cartridge or
construction device. The term includes but is not limited to,
explosive rivets, explosive bolts, explosive charges for driving pins
or studs, cartridges for explosive-actuated power tools and
charges of explosive used in jet tapping to open hearth furnaces
and jet perforation of oil well casings |
Special
Industrial
High
Explosive Material |
shall include sheets,
extrusions, pellets, and packages of high explosives, containing
dynamite trinitrotoluol, pentaerythritolte-tranitrate,
cyclotrimethylene-trinitramine or other similar compounds used for high
energy-rate forming, expanding and shaping in metal fabrication and for
dismemberment and quick eduction of scrap metal |
Spectator
Area
(Drive-In
Theater) |
shall mean that are of an open
air drive-in theater where automobiles are parked so that spectators,
within them may view the screen |
Spray
Booth |
is a power-vented structure
provided to accommodate a spraying operation, designed to confine
and limit the escape of spray, vapor and residue and to safely conduct
or direct them to an exhaust system. |
Sprinkler
Alarm |
is a local alarm unit installed
so that any flow of water from a sprinkler system will result in
an audible alarm signal on the premises |
Stack
(Plumbing) |
is the vertical main of a system
of soil, waste or vent piping |
Stack
Group
(Plumbing) |
is a term applied to the
location of fixtures in relation to the stack so that by means of
proper fittings, vents may be reduced to a minimum |
Stack
Vent
(Plumbing) |
(sometimes called a waste vent
or soil vent) is the extension of a soil or waste stack above the
highest horizontal drain connected to the stack |
Stack
Venting
(Plumbing) |
is a method of venting a fixture
or fixtures through the soil or waste stack |
Stage |
is the space in a theater or
assembly room separated from the auditorium, equipped for theatrical or
similar performances that provide for the use of curtains, portable or
fixed scenery, lights or mechanical appliances |
Stage
Block |
is that portion of a theater or
assembly room containing only the stage or the stage in combination
with dressing rooms, storage and property rooms, workshops and other
rooms incidental to its operation |
Stage
Workshop |
is any shop or room in which
carpentry, electrical work, painting, or any other work incidental to
the preparation, operation or maintenance of any stage is done |
Stairway |
consists of one or more flights
of stairs with connecting landings, forming a continuous and
uninterrupted passage from one floor to another |
Stairway,
Enclosed |
is a stairway separated from the
rest of the building by fire resistive walls or partitions |
Stairway,
Exterior |
is a stairway on the outside of
a building or structure |
Stairway,
Interior |
is a stairway within a building
or structure |
Standard
Fire
Test |
is the test method and
conditions of acceptance of the Standard Methods of Fire Tests of
Building Construction and Materials ASTM E119 |
Standpipe
System |
is an arrangement of piping
installed in a building with outlets located in such a manner
that water can be discharged in streams streams through
hose attached to such hose outlets for the purpose of
extinguishing a fire and so protecting the building and its
contents; pumps, tanks and other equipment necessary to provide an
adequate supply of water to the hose outlets, shall be provided |
Standpipe
Main |
is the pipe which conveys
the water from the fire pump to the standpipe risers |
Standpipe,
Wet |
is a system in which the pipes
are kept filled with water |
Stop
Valve |
is a shut-off valve for
controlling the flow of refrigerant |
Storm
Drain |
See Building Storm Drain |
Storm
Sewer |
is a sewer used for conveying
rain water, surface water, condensate, cooling water, or similar liquid
wastes. |
Story |
is the space between any two (2)
floors or between the topmost floor and the ceiling. For the
purposes of this ordinance, a basement shall not considered a story. |
Stream |
is any natural, artificial or
channelized water course that transports continuous or periodic flowing
water |
Street |
is a public or private
right-of-way which affords a primary means of access to abutting
property, but does not include driveways to buildings |
Street
Floor |
Includes any story or floor
level accessible from the street, or from outside the building at
grade, with the floor level at main entrance not more than four (4)
feet above nor more than one (1) foot below street or grade level at
these points and so arranged and utilized as to qualify as the main
floor. Where due to differences in street levels there are two
(2) or more stories accessible from the street, each is a street floor
for the purpose of determining exit requirements. Where
there is no floor level within the specified limits for a street floor
above or below grade, the building has no street floor. |
Stressed-Grade
(Lumber) |
is a lumber grade defined in
such terms that a definite working stress may be assigned to it. |
Structural
Alterations |
is any change, other than
incidental repairs which would prolong the life of the supporting
members of a building. The addition, removal or alteration of
bearing walls, columns, beams, girders, or foundations would constitute
structural alteration. |
Structural
Clay
Tile |
is a hollow masonry unit
composed of burned clay, shale, fire clay or mixtures thereof, and may
be load-bearing (designed to carry super-imposed loads), or
non-load-bearing. |
Structural
Glued
Laminated
Lumber |
shall mean any member comprising
an assembly of laminations of lumber in which the grain of all
laminations is approximately parallel longitudinally, and in which the
laminations are bonded with adhesives |
Structural
Steel
Members |
are primarily or secondary
members of rolled steel structural shapes other than light gauge steel
or steel joist members. |
Structure |
is an assembly of materials
forming a construction for occupancy or use, including among others;
buildings, stadia, reviewing stands, platforms, antenna towers,
including towers, radio towers, and other communication towers,
windmills, open sheds, shelters, coal silos, gas or liquid storage
tanks, display signs, piers, fences and trestles. |
Subsoil
Drain |
is a drain which receives only
subsurface or seepage water and conveys it to a place of disposal |
Substantial
Improvement |
For the purposes of this
definition "substantial improvement" is considered to occur when the
first alteration of any wall, ceiling, floor or other structural part
of the building commences, whether or not that alteration affects the
external dimension of the structure |
Sump |
is a tank or pit which receives
sewage or liquid waste, located below the normal grade of the
gravity system, and which must be emptied by mechanical mans |
Surface
Water
Elevation |
is the normal water level
elevation of a lake, stream or stream bed as depicted on maps as
described under the definition of "flood base elevation" |
Swimming
Pool,
Private |
shall be defined to include
pools and auxiliary structures and equipment at private residences
intended only for the use of the owner or friends |
Swimming
Pool,
Public |
shall mean an artificial basin
of water which has been modified, improved, constructed or
installed primarily for the purpose of public swimming and auxiliary
structures including dressing and locker rooms, toilets, showers and
other areas and enclosures that are intended for the use of persons
using the pool. Public swimming pools shall include: pools for
community use, pools at apartments, condominiums and other groups or
associations having five or more living units, clubs, churches, camps,
schools, institutions, Y.M.C.A's Y.W.C.A's, parks, recreational areas ,
motels, hotels and other commercial establishments. |
Tanker
Heater |
is a device for heating the
water in a gravity tank or pressure tank to prevent the water from
freezing |
Tent |
is any portable structure or
enclosure, the roof of which and/or one-half or more of the sides of
which are constructed of fabric, or a similar light pliable material. |
Terminal
Grain
Elevator |
is any grain elevator with a
capacity of 125,000 bushels or more, or any grain elevator where grain
is received by rail and/or water |
Terminal
Stopping
Device,
Elevator Emergency |
is a device which automatically
causes the power to be removed from an electric elevator
driving-machine motor and brake, or from a hydraulic elevator machine,
at a predetermined distance from this terminal landing and
independently of the functioning of the operating device and the
normal-terminal stopping device, if the normal-terminal stopping device
does not slow don the car as intended |
Terminal
Stopping
Device,
Elevator or Dumbwaiter, Final |
is a device which automatically
causes the power to be removed from an electric elevator or dumbwaiter
driving machine motor and brake or from a hydraulic elevator or
dumbwaiter machine, independent of the functioning of the
normal-terminal stopping device, the operating device or any emergency
terminal stopping device, after the car has passed a terminal
landing |
Terminal
Stopping
Device,
Elevator Machine Final (Stop-Motion Switch) |
is a final-terminal stopping
device operated directly by the driving machine |
Terminal
Stopping
Device,
Elevator or Dumbwaiter Normal |
is a device or devices to slow
down and stop an elevator or dumbwaiter car automatically at or near a
terminal landing independently of the functioning of the
operating device |
Test
Blasting
Cap |
is a cap containing two (2)
grams of a mixture of 80 percent mercury fulminate and 20 percent
potassium chlorate or a cap of equivalent strength. |
Theater |
is an Assembly Building designed
or used primarily for theatrical or motion picture performances and
containing a stage or a projection block |
Thermoplastic
Material |
is a solid plastic material
which is capable of being repeatedly softened by increase of
temperature and hardened by decrease of temperate |
Thermosetting
Material |
is a solid plastic material
which is capable of being changed into a substantially infusible and
insoluble product when cured under the application of heat |
Tower |
is a building or structure high
i proportion to its lateral dimensions, either isolated or forming part
of any building |
Trap
(Plumbing) |
is a fitting or device so
designed and constructed as to provide, when properly vented, a liquid
seal which will prevent the back passage of air without materially
affecting the flow of sewage or waste water through it. |
Travel
Distance |
is the distance from a point on
a floor of a building or structure to a vertical exit, a horizontal
exit or an outside exit, measured along the line of travel,
except that in one-story Low or Moderate Hazard Industrial and Storage
Buildings travel distance may be considered as the distance from any
point to an aisle, passageway or other exit connection |
Threads |
are the horizontal surfaces in a
flight of steps |
Trouble
Signal |
is a signal indicating trouble
of any nature, such as a circuit break or ground, occurring in devices
or wiring |
Unfired
Pressure
Vessel |
is a closed container having an
inside diameter larger than six (6) inches, designed for a pressure in
excess of 15 psig; other than pressure from the water mains, and
constructed in accordance with the American Society of Mechanical
Engineer's Code (Section VIII) for Unfired Pressure Vessels and so
stamped or tagged in accordance therewith. |
Unit
System |
is a refrigerating system which
can be removed from the user's premises without disconnecting any
refrigerant-containing parts, water connections or fixed electrical
connections. |
Vacuum
Breaker |
See Backflow Preventer |
Variance |
means grant of relief from
the requirements of this ordinance which permits construction in a
manner that would otherwise be prohibited by this ordinance |
Vent
Duck |
is a tube, pipe, conduit or
continuous enclosed passageway used for the conveying of air, gases,
vapors or entrained particles |
Ventilating
Opening
|
is an aperture opening upon a
public way, yard, court, public, park, public waterway or into the roof
of the building or structure in which the opening is situated. It
shall be a window, skylight, or other openings which is provided
for ventilating purposes and which is equipped with adjustable louvers,
dampers, or other devices to deflect or diffuse the air currents. |
Ventilation |
is the process of supplying or
removing air by natural or mechanical means to or from any space in a
building |
Ventilation,
Mechanical |
is a process of supplying or
removing air, by mechanical means, to or from any space in a building |
Ventilation, Natural |
is a process of supplying or
removing air through windows, transoms, or other openings in the
exterior of a building by non-mechanical means |
Ventilation
Opening
Area |
is the free open area of a
ventilation device (window louver, etc.) in its most open position |
Vent
Opening |
is the net free area of an
opening used to vent a structural space for heat or explosion |
Vent
Pipe |
is an enclosed passageway used
for the removal of the products of combustion from a gas-fired appliance |
Vent
Stack
(Plumbing)
|
is a vertical vent pipe
installed primarily for the purpose of providing circulation of air to
and from any part of the drainage system. |
Vent
System
(Plumbing) |
is 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
Openings |
are openings through floors,
such as for stairways, elevators or conveyors or for purposes of light
and ventilation |
Vertical
Pipe |
is any pipe or fitting which is
installed in a vertical position or which makes an angle of not more
than 45 degrees with the vertical |
Walkway,
Moving |
is a level or inclined
conveyor belt-like system designed for the transporting of persons |
Wall,
Apron |
is that portion of a skeleton or
panel wall below the sill of a window |
Wall, Bearing |
is a wall which supports any
vertical load in addition to its own weight |
Wall,
Cavity |
is a wall built of masonry units
or of plain concrete or a combination of these materials, arranged to
provide an air space within the wall and in which the inner and outer
parts of the wall are tied together with metal ties |
Wall,
Composite |
is a wall built of a combination
of two 92a) or more masonry units of different materials bonded
together one forming the back-up and the other the facing elements. |
Wall,
Curtain |
is a non-bearing enclosure wall |
Wall,
Faced |
is a wall in which the masonry
facing and backing are of different material and are so bonded as to
exert a common reaction under the load |
Wall,
Fire |
is a wall which subdivides a
building into limited fire areas or which separates two (2) or more
building to restrict the spread of fire and which extends continuously
through all stories to a level above the roof. |
Wall,
Fire
Separation |
is a wall used to divide the
floor area of a building or structure into separate parts for
fire protection for different uses, for restricted occupancy or other
purposed specified in this ordinance |
Wall,
Hollow |
is a wall built of masonry units
so arranged as to provide an air space within the wall between
the inner and outer parts of a wall |
Wall,
Hollow
Unit |
is a wall composed entirely of
hollow masonry units |
Wall,
Hydrant |
is multiple outlet fitting
installed on the outside of a building and connected to the standpipe
main of an inside standpipe system for the use of the fire department
only, to obtain an additional supply of water form the fire pump in the
building |
Wall,
Non-Bearing |
is a wall which supports no
vertical load other than its own weight |
Wall,
Parapet |
is a low wall primarily designed
for protection of roofs from exposure fires |
Wall,
Party |
is a wall on an interior lot
line used or adapted for joint service between two 92) buildings |
Wall,
Retaining |
is a wall designed to support
adjacent earth or soil |
Wall,
Skeleton
or
Panel |
is a non-bearing wall supported
at each story |
Wall,
Spandrel |
is that portion of a wall above
the top of a window in one story and below the sill of the window in
the story above |
Wall,
Veneered |
is a wall having a facing of
masonry or other material securely attached to the backing, but not so
bonded as to exert a common reaction under load |
Waste
Pipe |
is a pipe which conveys only
liquid waste, free of fecal matter. |
Watercourse |
A river, stream, creek, brook,
branch or other drainageway in or into which storm water runoff
and flood waters flow either regularly or intermittently |
Water
Curtain |
is a system of approved open or
closed sprinkler heads or perforated pipes installed on the exterior of
a building at eaves, cornices, window openings and on mansard or peak
roofs, with water supply under manual control; or installed around
openings in floors or walls of a building with water supply
under thormostatic control. Such water contain is designed to
prevent the spread of fire through unenclosed interior and exterior
openings |
Water
Distributing Pipe |
in a building or premises is a
pipe which conveys water from the water service pipe to the plumbing
fixtures and other water outlets. |
Water
Main |
is a water-supply for public or
community use |
Water
Outlet |
as used in connection with the
water distributing system is the discharge opening for the water
(1) to a fixture; (2) to atmospheric pressure (except into an open tank
which is part of the water supply system); (3) to a boiler or heating
system; (4) to any water operated device or equipment requiring water
to operate but not a part of the plumbing system. |
Water
Service
Pipe |
is the pipe from the water main
or other source of water supply to the building served |
Water
Supply
System |
of a building or premises
consists of the water service pipe, the water distributing pipes and
the necessary connecting pipes, fitting, control valves and all
appurtenances in or adjacent tot he building or premises |
Water
Supply
Piping
Sprinkler System |
refers to the piping from the
source of supply to a sprinkler heads. The different sections of
piping are a. Branch line A horizontal pipe which conveys the water from a branch main to the sprinkler heads b. Branch main A horizontal pipe which conveys the water from a system main or riser to the branch lines c. standpipe risers or standpipes A vertical pipe which extends upward through a building and conveys the water from the standpipe main to the hose outlets |
Welded
Joint |
is a gas-tight joint obtained by
the joining of metal parts in the plastics or molten state |
Wet
Vent
(Plumbing)
|
is a vent which receives the
discharge from wastes other than water closets |
Window,
Fire |
is a window and its assembly so
constructed and assembled in place as to give specified protection
against the passenger of fire |
Window
Glass
Area |
shall mean the nominal are of
the window disregarding muntins, but not check rails or frame |
Wood
Frame
Construction |
is construction in which the
structural members are composed of wood (or other combustible
materials) having dimensions less than those required for heavy timber
construction |
Wythe,
Chimney |
is a partition between two (2)
chimney flues in the same stack or chimney |
Wythe,
Masonry |
is each continuous vertical
section of a wall one masonry unit in thickness |
Yard |
is an open space on the same
zoning lot with a building or structure unoccupied and unobstructed
from its lowest level to the sky, except as may otherwise be permitted
in the Cook County Zoning Ordinance. A "yard" extend along
a lot line and to a depth or width specified in the yard requirements
of the Book County Zoning Ordinance |
Yoke,
Vent
(Plumbing) |
is a pipe connecting upward from
a soil or waste stack to vent stack for the purposes of
preventing pressure changes of the stacks |
Zoning
Ordinance |
is the Cook County Zoning
ordinance, as amended |