IFC4 Subtypes Description
Not version-specific
Tekla Structures
Environment
Not environment-specific
This article provides a description or translation of the IFC4 subtypes available in Tekla Structures from version 2022 onwards.
For all types, the selection options "USERDEFINED" and "NOTDEFINED" are available. "USERDEFINED" allows for defining custom subtypes if required.
IfcBeam - Beam
| Selection | Translation | Notes |
|---|---|---|
| BEAM | Beam | A standard beam usually used horizontally. |
| JOIST | Crossbeam | Typically a wood or steel substructure of a floor. |
| HOLLOWCORE | Hollowcore | Typically precast concrete hollow-core slabs. |
| LINTEL | Lintel | A beam or horizontal element above an opening (e.g., door, window). |
| SPANDREL | Spandrel | A beam that typically forms part of the building’s facade. |
| T_BEAM | T-Beam | Typically T- or L-shaped beams supporting precast floors. |
| GIRDER_SEGMENT | Girder | Typically longitudinal load-bearing beams (e.g. bridge substructures). |
| DIAPHRAGM | Diaphragm | End segment of a beam, transferring loads to supports and resisting moments. |
| PIERCAP | Pier cap | A transverse beam over a (bridge) pier. |
| HATSTONE | Hatstone | A beam on a support or wing wall, countering seismic loads. |
| CORNICE | Cornice | Non-load-bearing beams along a bridge deck, often enclosing installations. |
| EDGEBEAM | Edge beam | Beams along bridge decks, usually made of concrete, for added stiffness. |
IfcBearing - Bearing
| Auswahl | Übersetzung | Bemerkung |
|---|---|---|
| CYLINDRICAL | Cylindrical | Cylindrical bearing. |
| SPHERICAL | Spherical bearing | Convex bearing surface within a concave pan. |
| ELASTOMERIC | Elastomeric bearing | A sliding bearing that carries vertical loads through contact stresses between a plate of sliding material and a counter surface, allowing movement by sliding and rotation through deformation of the elastomer. |
| POT | Pot bearing | A bearing that carries vertical loads through compression of an (elastomeric) disc enclosed in a (steel) cylinder, and allows rotation through deformation of the disc. |
| GUIDE | Guide bearing | A bearing that carries vertical loads through compression of an (elastomeric) disc enclosed in a (steel) cylinder, and allows rotation through deformation of the disc. |
| ROCKER | Rocker bearing | The bearing function is ensured by a rocker design. Includes line and point rocker bearings. |
| ROLLER | Roller bearing | The bearing function is provided by one or more rollers positioned between two plates. |
| DISK | Disc bearing | A disc bearing consists of an elastomeric disc between two metal plates. |
IfcColumn - Column
| Selection | Translation | Notes |
|---|---|---|
| COLUMN | Column | A standard structural element, typically vertical, that must withstand vertical loads through compression and sometimes also lateral forces. |
| PILASTER | Pilaster | A support element embedded in a wall, which may be load-bearing or used purely for decorative purposes. |
| PIERSTEM | Pier stem | A single vertical part of a pier, which can be a simple pier without division into segments or separate components such as flanges and webs, or a combination of segments and/or parts. |
| PIERSTEM_SEGMENT | Pier stem segment | A single vertical segment of a bridge pier. |
| STANDCOLUMN | Stand column | A column that transfers vertical loads from the superstructure to an arch below. |
IfcWall - Wall
| Selection | Translation | Notes |
|---|---|---|
| MOVABLE | Movable wall | Movable wall that is either sliding, such as a folding or sliding wall, or can be easily dismantled as a partition or assembly wall. Typically part of the interior system and does not define room boundaries. |
| PARAPET | Parapet | A wall-like barrier to protect people or vehicles from falling or to prevent the spread of fire. Often built at the edge of balconies, terraces, roofs, or along bridges. |
| PARTITIONING | Partition wall | A wall used to divide interior spaces, often of lightweight, sandwich-like construction (e.g., with gypsum board). Partition walls are usually non-load-bearing. |
| PLUMBINGWALL | Plumbing wall | A pier, casing, or enclosure typically used to conceal plumbing fixtures in sanitary rooms. These walls often do not extend to the ceiling. |
| SHEAR | Shear wall | A wall designed to resist shear forces. Examples include membranes within box girders, typically supported by a pier, used to resist transverse forces and transfer them to the support. |
| SOLIDWALL | Solid wall | A solid wall construction where the core is the only or primary layer, possibly with additional layers. These are often masonry or concrete (cast-in-place or precast), typically load-bearing and fireproof. |
| STANDARD | Deprecated | Should no longer be used. |
| POLYGONAL | Polygonal wall | A polygonal wall with varying wall thickness along its course. |
| ELEMENTEDWALL | Deprecated | Should no longer be used. |
| RETAININGWALL | Retaining wall | A retaining wall used to hold back soil layers behind it. Special types include gabion walls and crib walls. Examples include wing wall, headwall, stem wall, pier wall, and protective wall. |
| WAVEWALL | Wave wall | Protective wall to prevent wave overtopping and impact on a dam. |
IfcBuildingElementPart - Building Element
| Selection | Translation | Notes |
|---|---|---|
| INSULATION | Insulation | For example, wall insulation, including in sandwich walls or wall panels. |
| PRECASTPANEL | Precast wall panel | Inner or outer layer of a sandwich wall panel. |
| APRON | Apron | A type of scour protection, made of wood, concrete, riprap, paving, or other constructions, installed at abutments and piers to prevent undermining. |
| ARMOURUNIT | Armour unit | A large piece of rubble or concrete used as erosion protection on slopes, such as revetments and breakwaters. |
| SAFETYCAGE | Safety cage | Safety cages consist of round, vertical bars attached to the side rails of access ladders, arranged to enclose a worker's path while climbing. Also known as cage or hoop ladders. |
IfcSlab - Roof/ Floor
| Selection | Translation | Notes |
|---|---|---|
| FLOOR | Floor slab | The slab is used to represent a floor of a building or a bridge deck. |
| ROOF | Roof slab | The slab is used to represent a roof slab (either flat or sloped). |
| LANDING | Landing | The slab is used to represent a landing within a staircase or ramp. |
| BASESLAB | Base slab | The slab is used to represent a base slab against the ground (thus part of the foundation). Also referred to as a raft foundation. |
| APPROACH_SLAB | Approach slab | Part of the bridge abutment that forms the transition from the embankment to the bridge. |
| PAVING | Pavement | Hard surface layer of a road or other paved area, usually made of concrete. |
| WEARING | Wearing course | The slab is used to represent a wearing course.Die Platte wird zur Darstellung einer Tragschicht verwendet. |
| SIDEWALK | Sidewalk | The slab is used to represent a sidewalk. |
| TRACKSLAB | Track slab | A track slab is a reinforced or prestressed concrete slab that forms a main element of the trackway. It can be precast or cast in place and may include sleepers. |
IfcPlate - Plate
| Selection | Translation | Notes |
|---|---|---|
| CURTAIN_PANEL | Curtain panel | Panel in a curtain wall facade, often consisting of a frame with window glazing. |
| SHEET | Sheet metal | Sheet metal often used as an additional part in an assembly. |
| FLANGE_PLATE | Flange | A flange in linear components with box or I-profile (e.g., upper or lower flange in box girders).. |
| WEB_PLATE | Web plate | A plate that connects flanges in linear components with box or I-profile. |
| STIFFENER_PLATE | Stiffener plate | A transverse plate added to a flange or web plate for local stiffening. |
| GUSSET_PLATE | Gusset plate | A plate or angle used to reinforce a frame (such as in buildings or bridges). |
| COVER_PLATE | Cover plate | A plate (above or below) a flange that provides additional load capacity. |
| SPLICE_PLATE | Splice plate | A plate that connects two parts joined at their ends. |
| BASE_PLATE | Base plate | A plate used to distribute load over an area, e.g., beneath a support or column base. |
IfcFastener - Fasteners
| Selection | Translation | Notes |
|---|---|---|
| GLUE | Glue | Fastener using adhesive to join elements together. |
| MORTAR | Mortar | Used to fill joints and may have a load-bearing function. |
| WELD | Weld | A weld between parts made of metallic materials or other suitable materials. |
IfcFooting - Footing
| Selection | Translation | Notes |
|---|---|---|
| CAISSON_FOUNDATION | Senkkastengründung | A foundation construction type used in underwater construction. |
| FOOTING_BEAM | Footing beam | Footing elements that are in bending and are supported clear of the ground. They will normally span between piers, piles or pile caps. They are distinguished from beams in the building superstructure since they will normally require a lower grade of finish. They are distinguished from STRIP_FOOTING since they are clear of the ground surface and hence require support to the lower face while the concrete is curing. |
| PAD_FOOTING | Pad footing | An element that transfers the load of a single column (possibly two) to the ground. |
| PILE_CAP | Pile cap | An element that transfers the load from a column or group of columns to a pier or pile or group of piers or piles. |
| STRIP_FOOTING | Strip footing | Linear element that transfers loads into the ground from either a continuous element, such as a wall, or from a series of elements, such as columns. |
IfcPile - Pile
| Selection | Translation | Notes |
|---|---|---|
| BORED | Bored | A bore pile. |
| DRIVEN | Driven | A rammed, vibrated, or otherwise driven pile. |
| JETGROUTING | Jet grouting | An injected pile-like construction. |
| COHESION | Cohesion | A cohesion pile. |
| FRICTION | Friction | A friction pile. |
| SUPPORT | Supported | A support pile. |
IfcRailing - Railing
| Selection | Translation | Notes |
|---|---|---|
| HANDRAIL | Handrail | A type of railing that serves as an optional structural support for loads applied by people (at hand height). Typically installed on ramps and stairs, mounted to the floor or wall. |
| GUARDRAIL | Guardrail | A railing intended to prevent people or vehicle occupants from falling off stairs, ramps, or landings where vertical drops exist, or to restrain errant vehicles on road medians or edges. |
| BALUSTRADE | Balustrade | Similar to a guardrail, but specifically located at floor edges rather than stairs or ramps e.g., on roofs, balconies, bridges, or atop retaining walls. |
| FENCE | Fence | efinition per ISO 6707-1: a non-load-bearing vertical construction, usually lightweight, used to enclose or divide an outdoor space. |
IfcBuildingElementProxy - Any building element / placeholder
| Selection | Translation | Notes |
|---|---|---|
| COMPLEX | No longer in use | Retained only for compatibility with older IFC versions. |
| ELEMENT | No longer in use | Retained only for compatibility with older IFC versions. |
| PARTIAL | No longer in use | Retained only for compatibility with older IFC versions. |
| PROVISIONFORVOID | Provision for void | Placeholder for a requested opening in a building element that is not yet an actual void. Typically used for MEP penetration requests. |
| PROVISIONFORSPACE | Provision for space | Placeholder for the required space within a room. Typically used for mechanical equipment or essential furniture. |
IfcMember - Member / Beam-like Element
| Selection | Translation | Notes |
|---|---|---|
| BRACE | Brace | A linear (typically diagonal) element often used to brace a beam or truss. |
| CHORD | Chord | The top or bottom longitudinal member of a truss, used horizontally or inclined. |
| COLLAR | Collar tie | A linear (typically horizontal) element in a roof structure that connects rafters and posts. |
| MEMBER | Member | A linear element within a beam or truss without specific designation. |
| MULLION | Mullion | A linear element in a curtain wall system that connects two or more panels. |
| PLATE | Plate | A continuous, horizontal linear element in a wall frame, such as a top plate or bottom |
| POST | Post | A linear (typically vertical) element used as a support or to define a point. |
| PURLIN | Purlin | A straight (typically horizontal) element in a roof structure that supports the rafters. |
| RAFTER | Rafter | A linear element used to support roof panels or coverings, usually inclined. |
| STRINGER | Stringer | A linear element that supports stair or ramp runs, typically inclined. |
| STRUT | Strut | A linear compression element, often used within a beam or truss. |
| STUD | Stud | A vertical element in a wall frame. |
| STIFFENING_RIB | Stiffening rib | A linear element added to a flange or web plate of a beam for local stiffening. |
| ARCH_SEGMENT | Arch segment | Individual segments of an arch structure. |
| SUSPENSION_CABLE | Suspension cable | A hanging element, typically made of steel wire, sheathing, etc. |
| SUSPENDER | Suspender | A vertical element that suspends a structure (e.g., a bridge deck) from a main cable or arch. |
| STAY_CABLE | Stay cable | An inclined element that suspends a structure (e.g., a bridge deck) from a pylon. |
| STRUCTURALCABLE | Structural cable | A linear cable element used to secure or stabilize a structure, resisting transverse and longitudinal loads in tension only (not compression). Usually made of flexible rope or wire. |
| TIEBAR | Tie bar | A linear bar element used to secure or stabilize a structure by resisting transverse and longitudinal loads through tension and/or compression. Usually made of solid rod. |
IfcDiscreteAccessory - Embedded Component
| Selection | Translation | Notes |
|---|---|---|
| ANCHORPLATE | Anchor plate | An accessory made of a steel plate, headed studs, or welded rebar, embedded in the surface of a concrete element for later welding or bolting of other elements. |
| BRACKET | Bracket | An L-shaped or similarly shaped accessory placed in a corner between elements to hold them together or support another element. |
| SHOE | Support shoe | A column shoe or beam hanger used to support or secure an element. |
| EXPANSION_JOINT_DEVICE | Expansion joint device | A connecting device between building elements to allow for thermal expansion and contraction. |
| BIRDPROTECTION | Bird protection device | A device that prevents birds from perching at electrically sensitive locations, protecting them from electric shock and preventing short circuits. |
| CABLEARRANGER | Cable arranger | A flexible accessory or component placed around cables to minimize bending at the installation point. |
| INSULATOR | Insulator | Per IEC 151-15-39: A device used to support and electrically isolate a conductive element. |
| LOCK | Lock | A mechanical or electronic device secured via a physical object (e.g., key, fingerprint, RFID card), secret information (e.g., code), or a combination of both. |
| TENSIONINGEQUIPMENT | Tensioning equipment | A device used to maintain the tension of conductors or cables. |
| RAILPAD | Rail pad | Per EN 13481-1: A non-metallic pad placed between the rail and baseplate, or between the rail and sleeper, underlay, or slab. |
| SLIDINGCHAIR | Sliding chair | A component that supports and holds the conductor rail and a flat surface on which the base of the conductor rail slides. |
| PANEL_STRENGTHENING | Panel strengthening | A component that minimizes the effects of pumping on the substructure. |
| RAILBRACE | Rail brace | A rail component that prevents rails from tipping or twisting. |
| ELASTIC_CUSHION | Elastic cushion | A type of layer applied to the grooved sides of a concrete base to mitigate longitudinal and transverse loads on track structures. Only used in slab track systems. |
| SOUNDABSORPTION | Sound absorption | A track component designed to absorb sound and vibrations, often used in conjunction with slab track systems. |
| RAIL_LUBRICATION | Rail lubrication | A device that reduces rail wear across the entire wheelset to lower noise emissions, typically installed on the inside of outer rails in curves or near turnouts. |
| RAIL_MECHANICAL_EQUIPMENT | Rail mechanical equipment | Technical rail equipment installed on the track, such as blocking devices, speed regulators, preloaded inspectors, track scales, or controllable rail brakes. |
IfcMechanicalFastener - mechanical fastener
| Selection | Translation | Notes |
|---|---|---|
| ANCHORBOLT | Anchor bolt | A special type of bolt anchored into concrete, stone, or masonry. |
| BOLT | Bolt | A cylindrical threaded rod screwed into a threaded hole in a nut or other part to form a fastener. Often includes one or more washers and nuts. |
| DOWEL | Dowel / Pin | A cylindrical rod inserted into holes in the joined parts. |
| NAIL | Nail | A thin, pointed metal piece driven into materials as a fastener. |
| NAILPLATE | Nail plate | A metal plate with punched-out spikes that overlaps the connected parts and is pressed into their material. |
| RIVET | Rivet | A fastening part with a head on one end; the other end is hammered flat after insertion through holes in the joined components. |
| SCREW | Screw | A fastener with a conical threaded shaft and a slotted head. |
| SHEARCONNECTOR | Shear connector | A ring-shaped or toothed round/square fastener embedded or pressed into connected parts to resist shear. |
| STAPLE | Staple | A U-shaped metal piece with pointed ends driven into materials as a fastener. |
| STUDSHEARCONNECTOR | Headed stud connector | Cylindrical fasteners with a head on one end; welded to steel parts and embedded into concrete. |
| COUPLER | Coupler / Sleeve | A part that connects two rods or bars, such as reinforcement bars. |
| RAILJOINT | Rail joint | A mechanical assembly (e.g., fishplates) connecting two rail ends, possibly with features like insulation or expansion allowance. |
| RAILFASTENING | Rail fastening | Per EN 13481-1: An assembly of components that secures the rail to the supporting structure and holds it in the desired position, while allowing necessary movements. |
| CHAIN | Chain | A series of interconnected metal rings used to fasten, secure, or pull loads. |
| ROPE | Rope | A thick, strong cord made by twisting strands of materials like hemp, sisal, or nylon; primarily used for mooring ships. |
IfcRamp - Ramp
| Selection | Translation | Notes |
|---|---|---|
| STRAIGHT_RUN_RAMP | Straight run ramp | A ramp – i.e., an inclined floor, walkway, or roadway – that connects two levels. The straight run ramp consists of one straight section without turns. |
| TWO_STRAIGHT_RUN_RAMP | Two straight run ramp | A straight ramp consisting of two straight runs connected by a landing, without any curves. |
| QUARTER_TURN_RAMP | Quarter-turn ramp | A ramp with a 90° turn made up of two straight runs connected by a landing. The direction of turn is defined by the walking line. |
| TWO_QUARTER_TURN_RAMP | Two quarter-turn ramp | A ramp with a 180° turn made up of three straight runs connected by two landings. The direction of turn is defined by the walking line. |
| HALF_TURN_RAMP | Half-turn ramp | A ramp with a 180° turn made up of two straight runs connected by a landing. The direction of turn is defined by the walking line. |
| SPIRAL_RAMP | Spiral ramp | A ramp built around a circular or elliptical void, without any turns or landings. |
IfcRoof - Roof
| Selection | Translation | Notes |
|---|---|---|
| FLAT_ROOF | Flat roof | A roof with little or no slope to allow rainwater drainage. |
| SHED_ROOF | Shed roof | A roof with a single slope. |
| GABLE_ROOF | Gable roof | A roof sloping down on two sides from a central ridge, forming gables at both ends. |
| HIP_ROOF | Hip roof | A roof with sloping ends and sides that meet at a slanting overhang. |
| HIPPED_GABLE_ROOF | Half-hipped roof | A roof with a hip closing off a gable. |
| GAMBREL_ROOF | Gambrel roof | A roof sloping in two parts from a central ridge, forming gables at each end (Mansard style). |
| MANSARD_ROOF | Mansard roof | A roof with a steep lower slope and a flatter upper slope on each side. |
| BARREL_ROOF | Barrel roof | A roof or ceiling with a half-cylinder shape. |
| RAINBOW_ROOF | Rainbow roof | A gable roof shaped like a wide Gothic arch with gently sloping convex surfaces. |
| BUTTERFLY_ROOF | Butterfly roof | A roof with two slopes that fall inward from the eaves. |
| PAVILION_ROOF | Pavilion roof | A pyramid-shaped hip roof. |
| DOME_ROOF | Dome roof | A hemispherical hip roof. |
| FREEFORM | Freeform roof | A roof with a freeform shape. |
IfcTendonAnchor - Tendon Anchor
| Selection | Translation | Notes |
|---|---|---|
| COUPLER | Coupler / Connector | The anchor is an intermediate piece connecting two tendons. |
| FIXED_END | Fixed end | The anchor fixes the end of a tendon. |
| TENSIONING_END | Tensioning end | The anchor is used to apply prestressing to the tendon. |
IfcStair - Stair
| Selection | Translation | Notes |
|---|---|---|
| STRAIGHT_RUN_STAIR | Straight Stair | A stair that runs from one level to another without any turns or winders. The stair consists of a single straight flight. |
| TWO_STRAIGHT_RUN_STAIR | Straight Stair with Landing | A straight stair consisting of two straight flights connected by a landing, without any turns or winders. |
| QUARTER_WINDING_STAIR | Quarter Winding Stair | A stair that turns 90° and consists of two straight flights connected by a landing. The direction of the turn is determined by the walking line. |
| QUARTER_TURN_STAIR | Quarter Turn Stair with Landing | A stair consisting of a single flight that makes a 180° turn with winders. The direction of the turn is determined by the walking line. |
| HALF_WINDING_STAIR | Half Winding Stair | A stair that makes a 180° turn and consists of two straight flights connected by a landing. The direction of the turn is determined by the walking line. |
| HALF_TURN_STAIR | Half Turn Stair with Landing | A stair consisting of a single flight with two quarter winders, making a 180° turn. The direction of the turn is determined by the walking line. |
| TWO_QUARTER_WINDING_STAIR | Two-Quarter Winding Stair | A stair with a 180° turn, consisting of three straight flights connected by two landings. The direction of the turn is determined by the walking line. |
| TWO_QUARTER_TURN_STAIR | Two-Quarter Turn Stair with Landings | A stair with a 180° turn, consisting of three straight flights connected by two landings. The direction of the turn is determined by the walking line. |
| THREE_QUARTER_WINDING_STAIR | Three-Quarter Winding Stair | A stair consisting of a single flight with three quarter winders, making a 270° turn. The direction of the turn is determined by the walking line. |
| THREE_QUARTER_TURN_STAIR | Three-Quarter Turn Stair with Landings | A stair with a 270° turn, consisting of four straight flights connected by three landings. The direction of the turn is determined by the walking line. |
| SPIRAL_STAIR | Spiral Stair | A stair that winds around a central axis, usually without landings. Depending on the outer boundary, it may be a circular, elliptical, or rectangular spiral stair. The orientation of the spiral is determined by the walking line.
|
| DOUBLE_RETURN_STAIR | Double Return Stair | A stair with a single straight flight leading to a wide quarter landing, from which two side flights run in opposite directions. The stair makes a 90° turn. The walking direction is determined by the walking line. |
| CURVED_RUN_STAIR | Curved Stair | A stair running from one level to another in a continuous curved flight, without any turns or winders. |
| TWO_CURVED_RUN_STAIR | Curved Stair with Landing | A stair consisting of two curved flights connected by a landing, without winders. |
| LADDER | Ladder | A device consisting of a series of rungs or steps between two upright supports, used for climbing up or down. |
IfcElementAssembly - Assembly (Assemblies only)
| Selection | Translation | Notes |
|---|---|---|
| ACCESSORY_ASSEMBLY | Accessory Assembly | Assembled accessories or components. |
| ARCH | Arch | A curved structure. |
| BEAM_GRID | Beam Grid | An interconnected system of beams lying in one (typically horizontal) plane. |
| BRACED_FRAME | Braced Frame | A rigid frame with additional bracing elements. |
| GIRDER | Girder | A beam-like superstructure, such as the main beam of a bridge, spanning between abutments and piers, consisting of beams, bracings (as members), etc. – can also refer to an assembly of girder segments. |
| REINFORCEMENT_UNIT | Reinforcement Unit | An assembly of reinforcement components. |
| RIGID_FRAME | Rigid Frame | A structural framework composed of beams, columns, etc., with moment-resisting connections, e.g., a portal frame. |
| SLAB_FIELD | Slab Field | Slabs arranged in a single plane. |
| TRUSS | Truss | A structural framework made of members with (quasi) pin-jointed connections. |
| ABUTMENT | Abutment | A bridge support structure consisting of walls, beams, slabs, etc. |
| PIER | Pier | An intermediate structure of a bridge, made of walls, columns, beams, etc. |
| PYLON | Pylon | A vertical structure supporting cables in a suspended or supported structure. |
| CROSS_BRACING | Cross Bracing | A linear structural element or assembly of elements within a box girder or between girders, typically on a pier, designed to resist lateral forces and transfer them to the support. |
| DECK | Deck/Platform | A platform (e.g., a floor or bridge deck) consisting of beams and slabs. |
| MAST | Mast | An assembly of plates, elements, cables, or fasteners forming a vertical structure to support or mount other equipment such as floodlights, sonar devices, or wireless transmitters. |
| SIGNALASSEMBLY | Signal Assembly | An assembly combining one or more signal instances (and also signage instances), including all supporting structural elements, such as a simple mast or rigid frame gantry. |
| GRID | Grid | A framework of parallel or intersecting cables or bars. |
| SHELTER | Shelter | A relatively quick-to-assemble, movable, or dismantlable structure providing protection, especially from weather or intruders. |
| SUPPORTINGASSEMBLY | Supporting Assembly | An assembly used to support the overhead contact system. It includes the foundation, support elements, and suspension device. |
| SUSPENSIONASSEMBLY | Suspension Assembly | A complex assembly of components used to suspend elements or cable segments. |
| TRACTION_SWITCING_ASSEMBLY | Traction Switching Assembly | A combined assembly used to perform switching functions. It consists of switches, control instruments, and other components. |
| TRACKPANEL | Track Panel | Track infrastructure that supports and guides a vehicle along a route. It consists of assembled rails, sleepers, and fasteners. |
| TURNOUTPANEL | Turnout Panel | Track infrastructure that enables support and guidance of a vehicle on a selected route between diverging or crossing tracks. |
| DILATATIONPANEL | Dilatation Panel | A device that allows for relative longitudinal movement between two adjacent rails while maintaining proper guidance and support. |
| RAIL_MECHANICAL_EQUIPMENT_ASSEMBLY | Rail Mechanical Equipment Assembly | A complex assembly composed of multiple components such as locking devices, speed regulators, pre-stressed testers, track scales, or controllable brakes. |
| ENTRACEWORKS | Entrance Works | An assembly forming the supporting structure of a chamber gate (lock, dock) and associated components, including enclosure of operational equipment. |
| SUMPBUSTER | Sump Buster | An obstacle (with an oil catch basin), typically installed on a bus lane to prevent use by vehicles with lower ground clearance. Also known as sump separator or sump trap. |
| TRAFFIC_CALMING_DEVICE | Traffic Calming Device | A roadway structure designed to regulate vehicle speed. |
IfcBridgePart - Bridge Component (Assemblies only)
| Selection | Translation | Notes |
|---|---|---|
| ABUTMENT | Abutment | A bridge abutment consisting of walls, beams, slabs, etc. |
| DECK | Deck/Platform | A platform (e.g., floor or bridge deck) consisting of beams and slabs. |
| DECK_SEGMENT | Deck Segment | A segment of a platform (e.g., floor or bridge deck) consisting of beams and slabs. |
| FOUNDATION | Foundation | |
| PIER | Pier | An intermediate bridge structure consisting of walls, columns, beams, etc. |
| PIER_SEGMENT | Pier Segment | A segment of an intermediate bridge structure, consisting of walls, columns, beams, etc. |
| PYLON | Pylone / Masten | A vertical structure that supports cables in a suspended or supported structure. |
| SUBSTRUCTURE | Substructure | |
| SUPERSTRUCTURE | Substructure | |
| SURFACESTRUCTURE | Surface Structure |
IfcReinforcingBar - Reinforcing bar (reinforcements only)
| Selection | Translation | Notes |
|---|---|---|
| ANCHORING | Anchoring | The reinforcing bar is used as anchorage reinforcement. |
| EDGE | Edge | The reinforcing bar is used as edge reinforcement. |
| LIGATURE | Ligature | The reinforcing bar is used as a tie, stirrup, or connecting reinforcement. |
| MAIN | Main Bar | The reinforcing bar functions as the main (primary) reinforcement. |
| PUNCHING | Punching | The reinforcing bar is used as punching shear reinforcement. |
| RING | Ring | The reinforcing bar is used as ring reinforcement. |
| SHEAR | Shear | The reinforcing bar is used as shear reinforcement. |
| STUD | Stud | The reinforcing bar is a stud. |
| SPACEBAR | Spacer Bar | A stirrup, typically used in post-tensioning systems to position tendons. |
IfcWindow - Window
| Selection | Translation | Notes |
|---|---|---|
| WINDOW | Window | A standard window typically installed in a wall opening, as a casement in a curtain wall, or as a "freestanding" window. |
| SKYLIGHT | Skylight | A window integrated into an inclined building element, usually a roof slab. |
| LIGHTDOME | Light Dome | A special type of window lying horizontally in a roof slope opening. |
IfcDoor - Door
| Selection | Translation | Notes |
|---|---|---|
| DOOR | Door | A standard door typically installed in a wall opening, as a door leaf in a curtain wall, or as a "freestanding" door. |
| GATE | Gate | A gate is a point of entry, usually within an opening in a fence, or as a "freestanding" gate. |
| TRAPDOOR | Trapdoor | A special type of door lying horizontally within a ceiling opening, often used for access to a basement or attic. |
| BOOM_BARRIER | Boom Barrier | A barrier (also called a gate arm) is a pivoting pole or bar used to control vehicle or pedestrian access at a controlled point. |
| TURNSTILE | Turnstile | A mechanical gate with rotating arms that allows passage of one person at a time. |