#### 5.4.3.16 IfcTransportElement

| Equipement de transport
| Beförderungsgerät

A transport element is a generalization of all transport related objects that move people, animals or goods within a building or building complex. The IfcTransportElement defines the occurrence of a transport element, that (if given), is expressed by the IfcTransportElementType.

> EXAMPLE Transportation elements include elevator (lift), escalator, moving walkway, etc.

> NOTE More detailed equipment that may be a part of a transportation device, like a lifting hook, is defined as IfcDiscreteAccessory. It maybe included as a part of the IfcTransportElement by virtue of the objectified relationship IfcRelAggregates.

Depending on local classification systems transport elements and transportation systems in buildings are either considered as part of a building system, or as part of a building service system. Within IFC they are considered as part of a building system and may have to be mapped appropriately.

> HISTORY New entity in IFC2x.

> IFC2x CHANGE The attribute PredefinedType (previously OperationType) is made optional.

> IFC4 CHANGE The last attributes CapacityByWeight and CapacityByNumber are removed, use Pset_TransportElementCommon instead.

## Building Automation

The following concepts are inherited at supertypes:

- IfcRoot: Revision Control
- IfcElement: Table Mapping

Instance diagram

Identity

The Identity concept applies to this entity.

Exchange |  |  |  |  |
--- | --- | --- | --- | --- | ---
Import |  |  |  |  |
Export |  |  |  |  |

Classification

The Classification concept applies to this entity.

Object Typing

The Object Typing concept applies to this entity as shown in Table 30.

Type
IfcTransportElementType
Table 30 — IfcTransportElement Object Typing

Exchange |  |  |  |  |
--- | --- | --- | --- | --- | ---
Import |  |  |  |  |
Export |  |  |  |  |

Property Sets

The Property Sets concept applies to this entity as shown in Table 31.

PredefinedType | Name
--- | ---
| Pset_TransportElementCommon
ELEVATOR | Pset_TransportElementElevator
| Pset_ManufacturerOccurrence
| Pset_ManufacturerTypeInformation
Table 31 — IfcTransportElement Property Sets

Exchange |  |  |  |  |
--- | --- | --- | --- | --- | ---
Import |  |  |  |  |
Export |  |  |  |  |

Spatial Containment

The Spatial Containment concept applies to this entity as shown in Table 32.

Structure
IfcBuildingStorey
Table 32 — IfcTransportElement Spatial Containment

Transport elements are positioned within the building storey at the base level for which they are contained.

Exchange |  |  |  |  |
--- | --- | --- | --- | --- | ---
Import |  |  |  |  |
Export |  |  |  |  |

XSD Specification:

<xs:element name="IfcTransportElement" type="ifc:IfcTransportElement" substitutionGroup="ifc:IfcElement" nillable="true"/>
<xs:complexType name="IfcTransportElement">
<xs:complexContent>
<xs:extension base="ifc:IfcElement"/>
</xs:complexContent>
</xs:complexType>

EXPRESS Specification:

ENTITY IfcTransportElement

| SUBTYPE OF IfcElement;

PredefinedType | : | OPTIONAL IfcTransportElementTypeEnum;

| WHERE

CorrectPredefinedType | : | NOT(EXISTS(PredefinedType)) OR (PredefinedType <> IfcTransportElementTypeEnum.USERDEFINED) OR ((PredefinedType = IfcTransportElementTypeEnum.USERDEFINED) AND EXISTS (SELF\IfcObject.ObjectType));
CorrectTypeAssigned | : | (SIZEOF(IsTypedBy) = 0) OR ('IFCPRODUCTEXTENSION.IFCTRANSPORTELEMENTTYPE' IN TYPEOF(SELF\IfcObject.IsTypedBy[1].RelatingType));

END_ENTITY;

EXPRESS-G diagram

Attribute Definitions:

PredefinedType | : | Predefined generic types for a transportation element that are specified in an enumeration. There might be property sets defined specifically for each predefined type. IFC4 CHANGE The attribute has been changed to be optional.

Formal Propositions:

CorrectPredefinedType | : | Either the IfcTransportElement attribute is unset (e.g. because an IfcTransportElementType is associated), or the inherited attribute ObjectType shall be provided, if the PredefinedType is set to USERDEFINED.
CorrectTypeAssigned | : | Either there is no transport element type object associated, i.e. the IsTypedBy inverse relationship is not provided, or the associated type object has to be of type IfcTransportElementType.

Inheritance Graph:

ENTITY IfcTransportElement

| ENTITY IfcRoot

GlobalId | : | IfcGloballyUniqueId;
OwnerHistory | : | OPTIONAL IfcOwnerHistory;
Name | : | OPTIONAL IfcLabel;
Description | : | OPTIONAL IfcText;

| ENTITY IfcObjectDefinition

| INVERSE

HasAssignments | : | SET OF IfcRelAssigns FOR RelatedObjects;
Nests | : | SET [0:1] OF IfcRelNests FOR RelatedObjects;
IsNestedBy | : | SET OF IfcRelNests FOR RelatingObject;
HasContext | : | SET [0:1] OF IfcRelDeclares FOR RelatedDefinitions;
IsDecomposedBy | : | SET OF IfcRelAggregates FOR RelatingObject;
Decomposes | : | SET [0:1] OF IfcRelAggregates FOR RelatedObjects;
HasAssociations | : | SET OF IfcRelAssociates FOR RelatedObjects;

| ENTITY IfcObject

ObjectType | : | OPTIONAL IfcLabel;

| INVERSE

IsDeclaredBy | : | SET [0:1] OF IfcRelDefinesByObject FOR RelatedObjects;
Declares | : | SET OF IfcRelDefinesByObject FOR RelatingObject;
IsTypedBy | : | SET [0:1] OF IfcRelDefinesByType FOR RelatedObjects;
IsDefinedBy | : | SET OF IfcRelDefinesByProperties FOR RelatedObjects;

| ENTITY IfcProduct

ObjectPlacement | : | OPTIONAL IfcObjectPlacement;
Representation | : | OPTIONAL IfcStrippedOptional;

| INVERSE

ReferencedBy | : | SET OF IfcRelAssignsToProduct FOR RelatingProduct;

| ENTITY IfcElement

Tag | : | OPTIONAL IfcIdentifier;

| INVERSE

ContainedInStructure | : | SET [0:1] OF IfcRelContainedInSpatialStructure FOR RelatedElements;

| ENTITY IfcTransportElement

PredefinedType | : | OPTIONAL IfcTransportElementTypeEnum;

END_ENTITY;

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