- Ruhrsite-ID The official identification number used by municipalities in the Ruhr region of Germany.
- rack and pinion Elevators that climb along a toothed rack through the rotation of pinion gears engaged to the rack.
- rack-supported building An enclosure supported internally by a dense framework of storage racks.
- radar transmission A site for transmission of radar signals.
- radial-lobed A floor plan in the shape of a flower or star, with radial wings arranged around a common center.
- radiators Heating is generated by passing water through convection coils in local spaces within the building.
- radio station Space for the production and broadcast of radio programs.
- radio transmission A site where radio station signals are disseminated through the air.
- radome An enclosure for protecting microwave transmission equipment.
- rail spur connection A direct interface to a railroad spur for loading and unloading.
- rail traffic A site or structure used as a route for trains, subways, or other form of rail transportation.
- rail traffic control A control tower or other site for directing railroad traffic.
- rail traffic signal Dynamically changing signs which issue commands to trains and railcars.
- railcar maintenance Facilities for the repair and upkeep of trains, subways, and trams.
- railcar speed (max) The maximum speed normally achieved by a railcar on a rail pathway or amusement ride.
- railing fabricator A manufacturer of protective or restrictive fence-like barriers that are installed permanently.
- railroad A route lined with tracks which is accessible to trains.
- railyard An open-air site with many parallel railroad tracks for storing and sorting rail cars.
- rainwater recycling A system to collect rainwater and make use of it within a structure.
- raised access floor fabricator A manufacturer of elevated floors that permit enhanced electronics or utilities underneath.
- raised floors Elevated floorplates designed to allow advanced wiring systems underneath.
- ramp down A main entrance is approached from outside by walking or moving down a ramp.
- ramp up A main entrance is approached from outside by walking or moving up a ramp.
- ramped floor A floor level above ground, with a sloping floor surface which connects to other levels.
- rapid transit line A dedicated corridor for urban rail transportation with limited reach.
- rating A standardized quality assessment of a structure or any subset of that structure.
- raw material storage A container or site for bulk storage of liquid or particle commodities.
- reactor building A shell-like building designed to hold a power-generating reactor.
- reading room A small library included as an extra amenity, with bookshelves and reading space.
- real estate Companies or other entities which control and/or manage properties.
- real estate agency An office where customers looking for homes or other real estate meet with brokers or agents.
- real estate agent A firm which sells or leases real estate to purchasers and prospective tenants.
- real estate association An organization to promote common causes among various enrolled property firms.
- real estate research A company which researches and sells information about real estate markets.
- real estate services Spaces for customer or user services pertaining directly to real estate properties.
- real estate software A producer of software used in property management applications.
- rebar manufacturer A manufacturer of steel bars used to reinforce structural concrete in a building frame.
- reception antenna A metal coil or other device, usually on a roof, for picking up airborne broadcast signals.
- recessed lighting Incandescent lighting which is flush with or recessed above the ceiling plane.
- recladding begins Removal of the existing facade begins in preparation for a new facade.
- recladding ends Replacement of the previous facade with a new ones is completed.
- recognition A regularly bestowed award or other certification given to an object for a defined reason.
- recognition date The officially stated date, month, year, or other time for which a recognition is given.
- recognition type The general class of recognition which defines its character.
- record store Retail space specializing in recorded music and sounds.
- recording studio A place where sound recordings are made.
- recreation Space for relaxing activities such as playing, resting, and enjoying the environment.
- rectangle A floor plan with 4 sides meeting at right angles and one axis longer than the other.
- rectory Housing for priests or other clergy.
- recycling center A site for the collection and sorting of recyclable wastes.
- recycling storage Space for storage of materials about to be recycled.
- red Colors with a reddish hue, ranging from light pink to very dark red.
- red Medium red; one of the three additive primary colors.
- red violet A slightly dark shade of red with a bit of purple.
- reference point Definitions of terms referred to in data and professional literature.
- reform synagogue A house of prayer and worship in Reform Judaism.
- refugee asylum Living space provided for persons fleeing wars or political conditions in their homeland.
- region A widely recognized group of closely related adjoining countries.
- region-themed zoo exhibit A zoo habitat for housing and displaying animals of a particular continent or region.
- regional courthouse A general-purpose courthouse with specific regional jurisdiction.
- regional cuisine fast food A fast food restaurant specializing in a particular regional or national style of food.
- regional cuisine restaurant A restaurant specializing in food cooked in a particular regional or national style.
- regional cuisine take-out A place without table service where customers order food from any national or regional cuisine for take-out or delivery.
- regional mall A large shopping mall with at least one major anchor store.
- regional police station A base office for a police department under a government between the city level and the national level.
- regular floor A normal and occupiable floor level which is fully above the base level of a building or structure.
- rehabilitation center A place for restorative exercise and treatment following illness, surgery, or trauma.
- rehearsal space A place designated for practicing and rehearsing any performing art.
- reinforced concrete A load-bearing staircase frame built of steel-reinforced concrete.
- reinforced concrete A load-bearing frame made of poured-in-place concrete with steel reinforing bars.
- reinforced concrete A roof-supporting framework made of reinforced concrete.
- reinsurance company A company which distributes financial risk among insurers to stabilize their business.
- relationships Connections between one object and any number of others.
- relief carving Extensive or prominent carvings on the facade or outer surface of a structure.
- religion Space used for religious rituals, ceremonies, prayers, and devotions.
- religious affiliation A place operated by or connected closely with one particular religious faith.
- religious building A building for religious purposes with a large open interior or other monumental qualities.
- religious distinction A recognized designation of a religious site within a religious hierarchy or classification system.
- religious housing Group housing for clergy or any members of a religious order.
- religious memorial A site or object representing a saint, deity, scriptural scene, or other subject with religious significance.
- relocation to a new site An object reaches its new site after being moved from another.
- remote heat generation Heat is supplied by an external heating plant, and delivered in the form of a heat conductor such as water.
- removal from former site An object is removed from one site, on the way to be relocated at another.
- removed The structure has been taken from its location without having been destroyed.
- renaissance European architecture of the 14th-17th centuries with an emphasis on classical symmetry and order.
- renamed A company which has changed its name, and exists later in another form.
- rendering A mechanically or electronically drawn likeness of an object.
- renovated Space which has been significantly renovated within the past 5 years.
- renovation cost The amount of money spent on a single renovation project of any kind.
- rent payment online Rent can be paid via an online internet portal.
- rental aircraft hangar Enclosed space for storage and/or maintenance of aircraft available for short-term rental.
- rental area The total amount of built floor space that can be rented or leased.
- rental cost The price charged to tenants per measured square unit to rent space in a structure.
- rental housing Multiunit housing leased or rented to persons without a stake in the property.
- rental office Commercial workplaces which are leased out to their tenants.
- replacement initiated Replacement of one structure on a site with the next building takes effect.
- replica A structure which is a clear or acknowledged re-use of a design previously built elsewhere.
- reptile exhibit A zoo space for housing and public viewing of reptiles.
- research Spaces for experimental research and scientific and technological development.
- research establishment An institution which focuses on research in a particular field.
- reservoir formation An object designed to form a large available supply of standing water.
- residence provider A company which leases and sub-leases blocks of residential units.
- residential Space used for people's homes.
- residential area Total open floor area used for residential space.
- residential condominium Multi-unit housing which is set up for owner occupancy.
- residential condominium association A group of unit owners acting as the common owner of a building or complex.
- restaurant A space where customers are served meals at tables.
- restaurant operator A business which operates, franchises, or lends its brand to any commercial eatery.
- restoration begins Work begins on a process to return an object to its original or former appearance.
- restoration ends Work is completed on a process to return an object to its original or former appearance.
- restriction Quantitative or numerical limitations on accessibility of use of a place or object.
- restroom(s) in unit Toilet and washing facilities are available in each individual suite or unit.
- restrooms Toilet facilities with fixtures for personal washing and hand-drying.
- retail Space used for the trading of goods and services between vendors and consumers.
- retail and services Businesses which provide direct services to customers at a particular site.
- retail area Total open floor area used for retail space.
- retail building A building used mainly for stores, dining, or any similar customer-facing businesses.
- retirement home An independent living facility for senior citizens with nursing or medical care available on the premises.
- retractable bridge A movable bridge whose span opens by sliding backwards.
- retractable roof All or part of the roof can be moved back and forth to expose or cover the interior.
- retractable roof opening time The minimum length of time it takes to open a retractable roof completely.
- revenue Data which describes the receipts or earnings of any object.
- revival style Architectural styles from 1750 to the present which re-introduce older historical styles.
- revolving floor At least one floor of the building rotates around a central point.
- rheumatology Clinical space where doctors treat or advise patients for conditions of the joints and connective tissues.
- rigid frame A simple framing system relying on the strength of joints between members.
- riot police dormitory Temporary housing for mobilized police officers monitoring large and important events.
- riverport terminal A station or loading facility for ships on a river.
- road shelter A tunnel-like enclosure built over a right-of-way to shelter or protect it.
- roadway A corridor where road vehicles can be driven.
- robotic facade maintenance Any system which cleans and maintains a building's windows and facade using robots, usually housed in a maintenance unit.
- robotic parking system A mechanized system that moves or guides into parking spaces.
- rock and roll club A lounge or bar specializing in live performances of rock music.
- rock storage Space for bulk storage of raw stone extracted from the earth.
- rococo An advanced form of Baroque design with excessive ornamentation.
- rodeo A field or fenced area used for rodeo performances.
- role The specific role a company performs with respect to any object it is connected with.
- roller coaster A thrill ride with large drops, swerves, twists, and/or loops along a set of tracks.
- roller hockey One or more rinks for hockey played on four-wheeled roller skates, with goals at both ends.
- roller skating Space for recreational or competitive roller skating or inline skating.
- rolling bascule bridge A movable bridge which opens by rolling large gears on a rack.
- roman catholic church A house of worthip in the Roman Catholic faith.
- romanesque Architecture of the early second millennium characterized by massive symmetrical constructions with rounded arches and vaults.
- roof covering The substance and layout of the material used to cover the upper surface of a building.
- roof deck The main roof or uppermost roof is equipped for regular access by tenants or visitors.
- roof form The basic shape of a building's top section or roofline.
- roof frame material The material used in the structural framework supporting the roof.
- roof height The distance from base level to the upper surface of the structure's highest hollow or enclosed portion.
- roof installation The company which specializes in the construction or installation of a structure's roof.
- roof installation begins Initial construction of a structure's roof begins.
- roof installation ends Initial construction of a structure's roof is concluded.
- roof peak A building summit formed by the narrowing of an enclosed space at a point or a line.
- roof renovation begins Recladding or reconstruction of a structure's roof is initiated.
- roof renovation ends Recladding or reconstruction of a structure's roof is finished.
- roof with towers A complex roof with prominent peaks or towers.
- roof-mounted billboard A large advertising sign mounted on the top of a structure.
- roofing manufacturer A manufacturer of cladding materials for the upper surface of a building.
- rooftop water tank A large container on a building's roof for supplying water to its plumbing or fire protection system.
- room A unitary space in a structure, bounded by walls, partitions, or boundaries with other rooms.
- rooms Quantities of internal divisions within a built object.
- roped hydraulic Hydraulic elevators with a combination of above-ground cylinders and cables for lifting the cabs.
- rose window A large circular window with tracery, placed in the center of a facade over the entrance.
- rotating ride Any freestanding amusement ride which turns, spins, or swings around a pivot point or axis.
- rotation time The amount of time in which a moving part of a structure rotates or revolves at maximum speed.
- routing Indicators of direction or proximity.
- rowboat rental A place where kayaks, canoes, or any boats propelled manually with oars can be rented.
- rowhouse cluster A row or set of attached homes built together or as part of a single development.
- royal purple An extremely dark shade of purple.
- rubber Flooring made of rubber sheets or tiles.
- rubber storage Space for bulk storage of raw rubber.
- rubble masonry A facade made of uncut stones fitted together loosely or approximately, not in regular courses or patterns.
- rug store Retail space specializing in single-piece floor coverings.
- rugby A rectangular grass field for games of rugby.
- running track A special surface arranged in a loop for running and track events.
- running track A measured track for running and jogging, usually divided into lanes.
- runway A smooth pathway designed for the take-off and landing of airplanes or spacecraft.
- runway access Direct access of persons or materials to an aircraft runway is available.
- russian A primarily ecclesiastical style characterized by square or cross-shaped plans, multiple onion domes, bright colors, and elaborate ornamentation.
- russian restaurant A restaurant specializing in Russian cuisine.