IfcDiscreteAccessoryType

Definition from IAI: The element type (IfcDiscreteAccessoryType) defines a list of commonly shared property set definitions of a discrete accessory and an optional set of product representations. It is used to define a supporting element mainly within structural and building services domains (i.e. the specific type information common to all occurrences of that type).

The occurrences of the IfcDiscreteAccessoryType are represented by instances of IfcDiscreteAccessory.

The IfcDiscreteAccessoryType is a specialization of the general building element component type to represent different type of structural and building service related auxiliary elements.

> HISTORY New entity in IFC Release 2x2

General usage

The exact type information of the IfcDiscreteAccessoryType is given in the ElementType attribute inherited from IfcElementType. Standard type designations are provided for guideline below. The list is not exhaustive and the list of definitions may be extended based on local national extensions.

Accessory type | Standard type designation | Description
Shading devices: | 'Shading device' | Elements specifically designed to provide shading, often fixed externally and sometimes moving (e.g. by rotation)
Corbels as separate components: | 'Hidden steel corbel' | Corbel system made from steel components embedded into the master element
| 'Visible steel corbel' | Corbel system made from steel components protruding from the master element
| 'Visible concrete corbel' | Corbel system made as a separate precast concrete component added to the master element
Anchor bolts: | 'Foundation bolt' | Fixture with bolt embedded into concrete structures for securing columns or for machine foundations
| 'Ribbed bar bolt' | Fixture with bolt and one or several anchoring ribbed (reinforcement) bars embedded into concrete structures for securing columns or for machine foundations.
| 'Extension bolt' | Fixture with bolt for extension joints between usually precast elements.
Connecting accessories, for example for sandwich wall panels: | 'Diagonal truss connector' | A fixing device in truss form with diagonal cross bars holding two precast conrete panels together in a sandwich wall panel.
| 'Ladder truss connector' | A fixing device in truss form with straight cross bars in ladder form holding two precast conrete panels together in a sandwich wall panel.
| 'Panel suspender' | A straight fixing device holding two precast conrete panels together in a sandwich wall panel.
| 'Bracket' | A bracket for supporting various precast concrete components.
Electrical accessories for precast concrete elements: | 'Conduit' | Conduit for cabling embedded in element.
| 'Electrical box' | Electrical box embedded in element.
| 'Double electrical box' | A double electrical box embedded in element.
| 'Roof box' | Roof box embedded in element.
| 'Junction box' | Junction box embedded in element.
| 'Splice' | Splice embedded in element.
| 'Protective plug' | Protective plug used in element for protecting electrical accessories during manufacturing, transportation and assembly.
Fixing parts: | 'Standard fixing plate' | Standard fixing plate.
| 'Edge fixing plate' | Fixing plate attached to the edge of an element.
| 'Corner fixing plate' | Fixing plate attached to the corner of an element.
| 'Slab fixing plate' | Fixing plate for slabs.
| 'Balcony hinge' | Accessory supporting and fixing balconies.
| 'Frame shoe' | Fixing shoe for frames.
| 'Thermo frame' | Thermo frame.
| 'Column shoe' | Fixing shoe for columns.
| 'Wall shoe' | Fixing shoe for walls.
| 'Fixing socket' | Fixing socket.
Joint accessories: | 'Neoprene bearing plate' | Rubber plate used as a bearing in, for example, joints between column corbels and beams.
| 'Working joint reinforcement' | Reinforcement accessory used in working joints.
| 'Expansion joint reinforcement' | Reinforcement accessory used in expansion joints.
| 'Ribbed steel bar extension' | Extension accessory made of a ribbed (reinforcement) bar used in joints.
| 'Steel pin bolt' | Pin bolt used to join together, for example, columns and beams.
| 'Concrete dowel' | Dowel pin used in joints.
| 'Concrete groove' | A groove made in a joint.
| 'Steel plate' | A steel plate used as an accessory in a joint.
| 'Wire loop' | A joint connector accessory made from a wire loop.
| 'Steel loop' | A joint connector accessory made from a steel bar loop.
| 'Sealing strip' | A strip sealing the joint.
| 'Sealing compound' | Sealing compound protecting and sealing the joint.
Lifting accessories: | 'Wire lifting hook' | A lifting aid in the form of a wire loop.
| 'Steel lifting hook' | A lifting aid in the form of a steel bar loop.
| 'Lifting socket' | A lifting aid in the form of a socket.
| 'Steel lifting anchor' | A lifting aid in the form of a steel lifting anchor.
| 'Lifting hole' | A lifting aid in the form of a hole.
Accessories mainly used in the building services domain: | 'Antivibration' | An isolating device to prevent other elements to be effected by vibrations.
| 'Bracket' | A bracket wich is used to support pipes or cables.
| 'Drop rod' | A length of material providing a hanging support to a bracket. Note that a drop rod is considered to include nuts and washers required for securing.
| 'Duct foot' | A base support used to receive a vertical pipe (BS6100 330 3309 - duct foot).
| 'Framing' | A frame placed around a penetration to prevent scraping against the building surface or structure.
| 'Grommet' | An element placed within a penetration that seals the penetration for a particular reason.
| 'Rack' | A set of shelving for the purposes of storage that may be freestanding or bolted to a structure.
| 'Safety part' | A part, typically installed in vertical shafts at each level, to ensure safety from falling when entering the shaft.
| 'Sleeve' | A thin barrier placed between a penetration and a penetrating element.
| 'Support section' | A section of material that is used as an intermediate support upon which multiple brackets can be mounted.

EXPRESS specification:

ENTITY IfcDiscreteAccessoryType
SUBTYPE OF ( | IfcElementComponentType);
END_ENTITY;

Inheritance graph

ENTITY IfcDiscreteAccessoryType;
ENTITY IfcRoot;
GlobalId | : | IfcGloballyUniqueId;
OwnerHistory | : | IfcOwnerHistory;
Name | : | OPTIONAL IfcLabel;
Description | : | OPTIONAL IfcText;
ENTITY IfcObjectDefinition;
INVERSE
HasAssignments | : | SET OF IfcRelAssigns FOR RelatedObjects;
IsDecomposedBy | : | SET OF IfcRelDecomposes FOR RelatingObject;
Decomposes | : | SET [0:1] OF IfcRelDecomposes FOR RelatedObjects;
HasAssociations | : | SET OF IfcRelAssociates FOR RelatedObjects;
ENTITY IfcTypeObject;
ApplicableOccurrence | : | OPTIONAL IfcLabel;
HasPropertySets | : | OPTIONAL SET [1:?] OF IfcPropertySetDefinition;
INVERSE
ObjectTypeOf | : | SET [0:1] OF IfcRelDefinesByType FOR RelatingType;
ENTITY IfcTypeProduct;
RepresentationMaps | : | OPTIONAL LIST [1:?] OF UNIQUE IfcRepresentationMap;
Tag | : | OPTIONAL IfcLabel;
ENTITY IfcElementType;
ElementType | : | OPTIONAL IfcLabel;
ENTITY IfcElementComponentType;
ENTITY IfcDiscreteAccessoryType;
END_ENTITY;