3. MISCELLANEOUS INSTRUCTIONS AND DEFINITIONS.
3.1 Graphic Conventions. Graphic conventions are shown in Table 1.
Dimensions that are not marked minimum or maximum are absolute, unless
otherwise indicated in the text or captions.
3.2 Dimensional Tolerances. All dimensions are subject to conventional
building industry tolerances for field conditions.
3.3 Notes. The text of these guidelines does not contain notes or footnotes.
Additional information, explanations, and advisory materials are located in
the Appendix. Paragraphs marked with an asterisk have related, nonmandatory
material in the Appendix. In the Appendix, the corresponding paragraph
numbers are preceded by an A.
3.4 General Terminology.
comply with. Meet one or more specifications of these guidelines.
if, if ... then. Denotes a specification that applies only when the
conditions described are present.
may. Denotes an option or alternative.
shall. Denotes a mandatory specification or requirement.
should. Denotes an advisory specification or recommendation.
Access Aisle. An accessible pedestrian space between elements, such as
parking spaces, seating, and desks, that provides clearances appropriate for
use of the elements.
Accessible. Describes a site, building, facility, or portion thereof that
complies with these guidelines.
Accessible Element. An element specified by these guidelines (for example,
telephone, controls, and the like).
Accessible Route. A continuous unobstructed path connecting all accessible
elements and spaces of a building or facility. Interior accessible routes may
include corridors, floors, ramps, elevators, lifts, and clear floor space at
fixtures. Exterior accessible routes may include parking access aisles, curb
ramps, crosswalks at vehicular ways, walks, ramps, and lifts.
Accessible Space. Space that complies with these guidelines.
Adaptability. The ability of certain building spaces and elements, such as
kitchen counters, sinks, and grab bars, to be added or altered so as to
accommodate the needs of individuals with or without disabilities or to
accommodate the needs of persons with different types or degrees of
Addition. An expansion, extension, or increase in the gross floor area of a
building or facility.
Administrative Authority. A governmental agency that adopts or enforces
regulations and guidelines for the design, construction, or alteration of
buildings and facilities.
Alteration. An alteration is a change to a building or facility made by, on
behalf of, or for the use of a public accommodation or commercial facility,
that affects or could affect the usability of the building or facility or part
thereof. Alterations include, but are not limited to, remodeling, renovation,
rehabilitation, reconstruction, historic restoration, changes or rearrangement
of the structural parts or elements, and changes or rearrangement in the plan
configuration of walls and full-height partitions. Normal maintenance,
reroofing, painting or wallpapering, or changes to mechanical and electrical
systems are not alterations unless they affect the usability of the building
Area of Rescue Assistance. An area, which has direct access to an exit, where
people who are unable to use stairs may remain temporarily in safety to await
further instructions or assistance during emergency evacuation.
Assembly Area. A room or space accommodating a group of individuals for
recreational, educational, political, social, or amusement purposes, or for
the consumption of food and drink.
Automatic Door. A door equipped with a power-operated mechanism and controls
that open and close the door automatically upon receipt of a momentary
actuating signal. The switch that begins the automatic cycle may be a
photoelectric device, floor mat, or manual switch (see power-assisted door).
Building. Any structure used and intended for supporting or sheltering any
use or occupancy.
Circulation Path. An exterior or interior way of passage from one place to
another for pedestrians, including, but not limited to, walks, hallways,
courtyards, stairways, and stair landings.
Clear Floor Space. The minimum unobstructed floor or ground space required to
accommodate a single, stationary wheelchair and occupant.
Closed Circuit Telephone. A telephone with dedicated line(s) such as a house
phone, courtesy phone or phone that must be used to gain entrance to a
Common Use. Refers to those interior and exterior rooms, spaces, or elements
that are made available for the use of a restricted group of people (for
example, occupants of a homeless shelter, the occupants of an office building,
or the guests of such occupants).
Cross Slope. The slope that is perpendicular to the direction of travel (see
Curb Ramp. A short ramp cutting through a curb or built up to it.
Detectable Warning. A standardized surface feature built in or applied to
walking surfaces or other elements to warn visually impaired people of hazards
on a circulation path.
Dwelling Unit. A single unit which provides a kitchen or food preparation
area, in addition to rooms and spaces for living, bathing, sleeping, and the
like. Dwelling units include a single family home or a townhouse used as a
transient group home; an apartment building used as a shelter; guest rooms in
a hotel that provide sleeping accommodations and food preparation areas; and
other similar facilities used on a transient basis. For purposes of these
guidelines, use of the term "Dwelling Unit" does not imply the unit is used as
Egress, Means of. A continuous and unobstructed way of exit travel from any
point in a building or facility to a public way. A means of egress comprises
vertical and horizontal travel and may include intervening room spaces,
doorways, hallways, corridors, passageways, balconies, ramps, stairs,
enclosures, lobbies, horizontal exits, courts and yards. An accessible means
of egress is one that complies with these guidelines and does not include
stairs, steps, or escalators. Areas of rescue assistance or evacuation
elevators may be included as part of accessible means of egress.
Element. An architectural or mechanical component of a building, facility,
space, or site, e.g., telephone, curb ramp, door, drinking fountain, seating,
or water closet.
Entrance. Any access point to a building or portion of a building or facility
used for the purpose of entering. An entrance includes the approach walk, the
vertical access leading to the entrance platform, the entrance platform
itself, vestibules if provided, the entry door(s) or gate(s), and the hardware
of the entry door(s) or gate(s).
Facility. All or any portion of buildings, structures, site improvements,
complexes, equipment, roads, walks, passageways, parking lots, or other real
or personal property located on a site.
Ground Floor. Any occupiable floor less than one story above or below grade
with direct access to grade. A building or facility always has at least one
ground floor and may have more than one ground floor as where a split level
entrance has been provided or where a building is built into a hillside.
Mezzanine or Mezzanine Floor. That portion of a story which is an
intermediate floor level placed within the story and having occupiable space
above and below its floor.
Marked Crossing. A crosswalk or other identified path intended for pedestrian
use in crossing a vehicular way.
Multifamily Dwelling. Any building containing more than two dwelling units.
Occupiable. A room or enclosed space designed for human occupancy in which
individuals congregate for amusement, educational or similar purposes, or in
which occupants are engaged at labor, and which is equipped with means of
egress, light, and ventilation.
Operable Part. A part of a piece of equipment or appliance used to insert or
withdraw objects, or to activate, deactivate, or adjust the equipment or
appliance (for example, coin slot, push button, handle).
Path of Travel. (Reserved).
Power-assisted Door. A door used for human passage with a mechanism that
helps to open the door, or relieves the opening resistance of a door, upon the
activation of a switch or a continued force applied to the door itself.
Public Use. Describes interior or exterior rooms or spaces that are made
available to the general public. Public use may be provided at a building or
facility that is privately or publicly owned.
Ramp. A walking surface which has a running slope greater than 1:20.
Running Slope. The slope that is parallel to the direction of travel (see
Service Entrance. An entrance intended primarily for delivery of goods or
Signage. Displayed verbal, symbolic, tactile, and pictorial information.
Site. A parcel of land bounded by a property line or a designated portion of
a public right-of- way.
Site Improvement. Landscaping, paving for pedestrian and vehicular ways,
outdoor lighting, recreational facilities, and the like, added to a site.
Sleeping Accommodations. Rooms in which people sleep; for example, dormitory
and hotel or motel guest rooms or suites.
Space. A definable area, e.g., room, toilet room, hall, assembly area,
entrance, storage room, alcove, courtyard, or lobby.
Story. That portion of a building included between the upper surface of a
floor and upper surface of the floor or roof next above. If such portion of a
building does not include occupiable space, it is not considered a story for
purposes of these guidelines. There may be more than one floor level within a
story as in the case of a mezzanine or mezzanines.
Structural Frame. The structural frame shall be considered to be the columns
and the girders, beams, trusses and spandrels having direct connections to the
columns and all other members which are essential to the stability of the
building as a whole.
Tactile. Describes an object that can be perceived using the sense of touch.
Text Telephone. Machinery or equipment that employs interactive graphic
(i.e., typed) communications through the transmission of coded signals across
the standard telephone network. Text telephones can include, for example,
devices known as TDD's (telecommunication display devices or telecommunication
devices for deaf persons) or computers.
Transient Lodging. A building, facility, or portion thereof, excluding
inpatient medical care facilities, that contains one or more dwelling units or
sleeping accommodations. Transient lodging may include, but is not limited
to, resorts, group homes, hotels, motels, and dormitories.
Vehicular Way. A route intended for vehicular traffic, such as a street,
driveway, or parking lot.
Walk. An exterior pathway with a prepared surface intended for pedestrian
use, including general pedestrian areas such as plazas and courts.
NOTE: Sections 4.1.1 through 4.1.7 are different from ANSI A117.1 in their
entirety and are printed in standard type (ANSI A117.1 does not include