 | Geschoss |
 | Building Storey |
 | Niveau |
| Item | SPF | XML | Change | Description | 4.0.0.0 |
|---|---|---|---|---|
| IfcBuildingStorey | ||||
| OwnerHistory | MODIFIED | Instantiation changed to OPTIONAL. | ||
| CompositionType | MODIFIED | Instantiation changed to OPTIONAL. |
The building storey has an elevation and typically represents a (nearly) horizontal aggregation of spaces that are vertically bound.
A storey is (if specified) associated to a building. A storey may span over several connected storeys. Therefore storey complex provides for a collection of storeys included in a building. A storey can also be decomposed in (horizontical) parts, where each part defines a partial storey. This is defined by the composition type attribute of the supertype IfcSpatialStructureElements which is interpreted as follow:
EXAMPLE In split level houses, a storey is split into two or more partial storeys, each with a different elevation. It can be handled by defining a storey, which includes two or more partial storeys with the individual elevations.
The IfcBuildingStorey is used to build the spatial structure of a building (that serves as the primary project breakdown and is required to be hierarchical). The spatial structure elements are linked together by using the objectified relationship IfcRelAggregates.
Figure 110 shows the IfcBuildingStorey as part of the s patial structure. It also serves as the spatial container for building and other elements.
NOTE Detailed requirements on mandatory element containment and placement structure relationships are given in view definitions and implementer agreements.
 |
Figure 110 — Building storey composition |
Figure 111 describes the heights and elevations of the IfcBuildingStorey.
 |
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Figure 111 — Building storey elevations |
HISTORY New entity in IFC1.0
| # | Attribute | Type | Cardinality | Description | R |
|---|---|---|---|---|---|
| 10 | Elevation | IfcLengthMeasure | ? |
Elevation of the base of this storey, relative to the 0,00 internal reference height of the building. The 0.00 level is given by the absolute above sea level height by the ElevationOfRefHeight attribute given at IfcBuilding. NOTE If the geometric data is provided (ObjectPlacement is specified), the Elevation value shall either not be included, or be equal to the local placement Z value. | X |
| # | Attribute | Type | Cardinality | Description | R |
|---|---|---|---|---|---|
| IfcRoot | |||||
| 1 | GlobalId | IfcGloballyUniqueId | Assignment of a globally unique identifier within the entire software world. | X | |
| 2 | OwnerHistory | IfcOwnerHistory | ? |
Assignment of the information about the current ownership of that object, including owning actor, application, local identification and information captured about the recent changes of the object,
NOTE only the last modification in stored - either as addition, deletion or modification. IFC4 CHANGE The attribute has been changed to be OPTIONAL. | X |
| 3 | Name | IfcLabel | ? | Optional name for use by the participating software systems or users. For some subtypes of IfcRoot the insertion of the Name attribute may be required. This would be enforced by a where rule. | X |
| 4 | Description | IfcText | ? | Optional description, provided for exchanging informative comments. | X |
| IfcObjectDefinition | |||||
| HasAssignments | IfcRelAssigns @RelatedObjects | S[0:?] | Reference to the relationship objects, that assign (by an association relationship) other subtypes of IfcObject to this object instance. Examples are the association to products, processes, controls, resources or groups. | X | |
| Nests | IfcRelNests @RelatedObjects | S[0:1] | References to the decomposition relationship being a nesting. It determines that this object definition is a part within an ordered whole/part decomposition relationship. An object occurrence or type can only be part of a single decomposition (to allow hierarchical strutures only).
IFC4 CHANGE The inverse attribute datatype has been added and separated from Decomposes defined at IfcObjectDefinition. | ||
| IsNestedBy | IfcRelNests @RelatingObject | S[0:?] | References to the decomposition relationship being a nesting. It determines that this object definition is the whole within an ordered whole/part decomposition relationship. An object or object type can be nested by several other objects (occurrences or types).
IFC4 CHANGE The inverse attribute datatype has been added and separated from IsDecomposedBy defined at IfcObjectDefinition. | X | |
| HasContext | IfcRelDeclares @RelatedDefinitions | S[0:1] | References to the context providing context information such as project unit or representation context. It should only be asserted for the uppermost non-spatial object.
IFC4 CHANGE The inverse attribute datatype has been added. | ||
| IsDecomposedBy | IfcRelAggregates @RelatingObject | S[0:?] | References to the decomposition relationship being an aggregation. It determines that this object definition is whole within an unordered whole/part decomposition relationship. An object definitions can be aggregated by several other objects (occurrences or parts).
IFC4 CHANGE The inverse attribute datatype has been changed from the supertype IfcRelDecomposes to subtype IfcRelAggregates. | X | |
| Decomposes | IfcRelAggregates @RelatedObjects | S[0:1] | References to the decomposition relationship being an aggregation. It determines that this object definition is a part within an unordered whole/part decomposition relationship. An object definitions can only be part of a single decomposition (to allow hierarchical strutures only).
IFC4 CHANGE The inverse attribute datatype has been changed from the supertype IfcRelDecomposes to subtype IfcRelAggregates. | X | |
| HasAssociations | IfcRelAssociates @RelatedObjects | S[0:?] | Reference to the relationship objects, that associates external references or other resource definitions to the object.. Examples are the association to library, documentation or classification. | X | |
| IfcObject | |||||
| 5 | ObjectType | IfcLabel | ? |
The type denotes a particular type that indicates the object further. The use has to be established at the level of instantiable subtypes. In particular it holds the user defined type, if the enumeration of the attribute PredefinedType is set to USERDEFINED.
| X |
| IsTypedBy | IfcRelDefinesByType @RelatedObjects | S[0:1] | Set of relationships to the object type that provides the type definitions for this object occurrence. The then associated IfcTypeObject, or its subtypes, contains the specific information (or type, or style), that is common to all instances of IfcObject, or its subtypes, referring to the same type.
IFC4 CHANGE New inverse relationship, the link to IfcRelDefinesByType had previously be included in the inverse relationship IfcRelDefines. Change made with upward compatibility for file based exchange. | X | |
| IsDefinedBy | IfcRelDefinesByProperties @RelatedObjects | S[0:?] | Set of relationships to property set definitions attached to this object. Those statically or dynamically defined properties contain alphanumeric information content that further defines the object.
IFC4 CHANGE The data type has been changed from IfcRelDefines to IfcRelDefinesByProperties with upward compatibility for file based exchange. | X | |
| IfcProduct | |||||
| 6 | ObjectPlacement | IfcObjectPlacement | ? | Placement of the product in space, the placement can either be absolute (relative to the world coordinate system), relative (relative to the object placement of another product), or constraint (e.g. relative to grid axes). It is determined by the various subtypes of IfcObjectPlacement, which includes the axis placement information to determine the transformation for the object coordinate system. | X |
| 7 | Representation | IfcProductRepresentation | ? | Reference to the representations of the product, being either a representation (IfcProductRepresentation) or as a special case a shape representations (IfcProductDefinitionShape). The product definition shape provides for multiple geometric representations of the shape property of the object within the same object coordinate system, defined by the object placement. | X |
| IfcSpatialElement | |||||
| 8 | LongName | IfcLabel | ? |
Long name for a spatial structure element, used for informal purposes. It should be used, if available, in conjunction with the inherited Name attribute.
NOTE In many scenarios the Name attribute refers to the short name or number of a spacial element, and the LongName refers to the full descriptive name. | X |
| ContainsElements | IfcRelContainedInSpatialStructure @RelatingStructure | S[0:?] | Set of spatial containment relationships, that holds those elements, which are contained within this element of the project spatial structure.
NOTE The spatial containment relationship, established by IfcRelContainedInSpatialStructure, is required to be an hierarchical relationship, where each element can only be assigned to 0 or 1 spatial structure element. | X | |
| ServicedBySystems | IfcRelServicesBuildings @RelatedBuildings | S[0:?] | Set of relationships to systems, that provides a certain service to the spatial element for which it is defined. The relationship is handled by the objectified relationship IfcRelServicesBuildings.
IFC4 CHANGE The inverse attribute has been promoted to the new supertype IfcSpatialElement with upward compatibility for file based exchange. | X | |
| IfcSpatialStructureElement | |||||
| 9 | CompositionType | IfcElementCompositionEnum | ? |
Denotes, whether the predefined spatial structure element represents itself, or an aggregate (complex) or a part (part). The interpretation is given separately for each subtype of spatial structure element. If no CompositionType is asserted, the dafault value 'ELEMENT' applies.
IFC4 CHANGE Attribute made optional. | X |
| IfcBuildingStorey | |||||
| 10 | Elevation | IfcLengthMeasure | ? |
Elevation of the base of this storey, relative to the 0,00 internal reference height of the building. The 0.00 level is given by the absolute above sea level height by the ElevationOfRefHeight attribute given at IfcBuilding. NOTE If the geometric data is provided (ObjectPlacement is specified), the Elevation value shall either not be included, or be equal to the local placement Z value. | X |
Storey Identity
The Storey Attributes concept applies to this entity.
Spatial Composition
The Spatial Composition concept template applies to this entity as shown in Table 10.
| ||||
Table 10 — IfcBuildingStorey Spatial Composition |
NOTE By using the inverse relationship IfcBuildingStorey.Decomposes it references (IfcBuilding || IfcBuildingStorey) through IfcRelAggregates.RelatingObjectIfcBuildingStorey, the referenced IfcBuildingStorey needs to have a different and higher CompositionType, i.e. COMPLEX (if the other IfcBuildingStorey has ELEMENT), or ELEMENT (if the other IfcBuildingStorey has PARTIAL).
Spatial Decomposition
The Spatial Decomposition concept template applies to this entity as shown in Table 11.
| ||||
Table 11 — IfcBuildingStorey Spatial Decomposition |
NOTE By using the inverse relationship IfcBuildingStorey.IsDecomposedBy it references IfcBuildingStorey || IfcSpace through IfcRelAggregates.RelatedObjects. If it refers to another instance of IfcBuildingStorey, the referenced IfcBuildingStorey needs to have a different and lower CompositionType, i.e. ELEMENT (if the other IfcBuildingStorey has COMPLEX), or PARTIAL (if the other IfcBuildingStorey has ELEMENT).
NOTE Multi storey spaces shall be spatially contained by only a single building storey, usually it is the building storey where the base of the space lies.
Spatial Container
The Spatial Container concept template applies to this entity as shown in Table 12.
| ||
Table 12 — IfcBuildingStorey Spatial Container |
If there are building elements and/or other elements directly related to the IfcBuildingStorey (like most building elements, such as walls, columns, etc.), they are associated with the IfcBuildingStorey by using the objectified relationship IfcRelContainedInSpatialStructure. The IfcBuildingStorey references them by its inverse relationship:
Elements can also be referenced in an IfcBuildingStorey, for example, if they span through several storeys. This is expressed by using the objectified relationship IfcRelReferencedInSpatialStructure. Systems, such as building service or electrical distribution systems, zonal systems, or structural analysis systems, relate to IfcBuildingStorey by using the objectified relationship IfcRelServicesBuildings.
Property Sets for Objects
The Property Sets for Objects concept template applies to this entity as shown in Table 13.
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Table 13 — IfcBuildingStorey Property Sets for Objects |
Quantity Sets
The Quantity Sets concept template applies to this entity as shown in Table 14.
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Table 14 — IfcBuildingStorey Quantity Sets |
Placement
The Product Local Placement concept applies to this entity.
The local placement for IfcBuildingStorey is defined in its supertype IfcProduct. It is defined by the IfcLocalPlacement, which defines the local coordinate system that is referenced by all geometric representations.
FootPrint GeomSet Geometry
The FootPrint GeomSet Geometry concept applies to this entity.
Object Typing
The Object Typing concept (defined at a supertype) does NOT apply to this entity.
Object Predefined Type
The Object Predefined Type concept (defined at a supertype) does NOT apply to this entity.
Object User Identity
The Object User Identity concept (defined at a supertype) does NOT apply to this entity.
Instance diagram
<?xml version="1.0"?>
<ConceptRoot xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" uuid="e8614be2-30d0-4816-8ecd-d8a5ac9787b9" name="IfcBuildingStorey" status="sample" applicableRootEntity="IfcBuildingStorey">
<Applicability uuid="00000000-0000-0000-0000-000000000000" status="sample">
<Template ref="4266f86b-6221-4cfe-8ed0-8845bb43999a" />
<TemplateRules operator="and" />
</Applicability>
<Concepts>
<Concept uuid="3662100e-85bd-49f7-a022-ccd975b62bf7" name="Storey Identity" status="sample" override="false">
<Template ref="488c9bb2-3102-4b89-bd20-42aa7060ae08" />
</Concept>
<Concept uuid="43daeb65-eca0-4317-8243-fa4b700afd1a" name="Spatial Composition" status="sample" override="false">
<Template ref="8c0fd2f7-71bb-4e6e-8fdb-0c02b352f14a" />
<TemplateRules operator="and">
<TemplateRule Description="Assignment to the building, where the building storey is a part of." Parameters="Spatial Composite=IfcBuilding;" />
<TemplateRule Description="Assignment to another building storey, e.g. if this building storey is a partial storey that refer to another storey." Parameters="Spatial Composite=IfcBuildingStorey;" />
</TemplateRules>
</Concept>
<Concept uuid="2962f3a2-bdae-46c0-8bcb-f903007f63fe" name="Spatial Decomposition" status="sample" override="false">
<Template ref="667f8443-ecce-4a8d-a63f-931fab0453e0" />
<Requirements>
<Requirement applicability="export" requirement="recommended" exchangeRequirement="dcd96125-898e-4ff0-b294-eb02afe953aa" />
<Requirement applicability="import" requirement="recommended" exchangeRequirement="dcd96125-898e-4ff0-b294-eb02afe953aa" />
</Requirements>
<TemplateRules operator="and">
<TemplateRule Description="Reference to the spaces that are assigned to this storey. " Parameters="Spatial Parts=IfcSpace;" />
<TemplateRule Description="Spatial decomposition into partial stories, if this storey is a main storey having subdivisions." Parameters="Spatial Parts=IfcBuildingStorey;" />
</TemplateRules>
</Concept>
<Concept uuid="d9fd3eb0-cd94-45ac-aa37-0f630734f9c6" name="Spatial Container" status="sample" override="false">
<Template ref="61dd08ed-fd01-4955-9337-8afd284a0e6f" />
<Requirements>
<Requirement applicability="export" requirement="recommended" exchangeRequirement="dcd96125-898e-4ff0-b294-eb02afe953aa" />
<Requirement applicability="import" requirement="recommended" exchangeRequirement="dcd96125-898e-4ff0-b294-eb02afe953aa" />
</Requirements>
<TemplateRules operator="and">
<TemplateRule Parameters="Type=IfcElement;" />
</TemplateRules>
</Concept>
<Concept uuid="358f8fe7-82f9-4ae6-80bc-dc8119e3bd24" name="Property Sets for Objects" status="sample" override="false">
<Template ref="f74255a6-0c0e-4f31-84ad-24981db62461" />
<TemplateRules operator="and">
<TemplateRule Parameters="PsetName=Pset_BuildingStoreyCommon;" />
</TemplateRules>
</Concept>
<Concept uuid="24284107-8e36-4af1-93b9-18479a09ab55" name="Quantity Sets" status="sample" override="false">
<Template ref="6652398e-6579-4460-8cb4-26295acfacc7" />
<Requirements>
<Requirement applicability="export" requirement="recommended" exchangeRequirement="dcd96125-898e-4ff0-b294-eb02afe953aa" />
<Requirement applicability="import" requirement="recommended" exchangeRequirement="dcd96125-898e-4ff0-b294-eb02afe953aa" />
</Requirements>
<TemplateRules operator="and">
<TemplateRule Parameters="QsetName=Qto_BuildingStoreyBaseQuantities;" />
</TemplateRules>
</Concept>
<Concept uuid="72b5d7d2-ee16-4f50-884f-0229970679ac" name="Placement" status="sample" override="false">
<Template ref="cbe85b5f-7912-4a43-8bb7-1e63bf40b26d" />
</Concept>
<Concept uuid="c38a5dc9-19d5-4292-8344-7491dfa17db0" name="FootPrint GeomSet Geometry" status="sample" override="false">
<Template ref="9456d6d6-a62a-48b4-baff-be2e38baac9c" />
<Requirements>
<Requirement applicability="export" requirement="recommended" exchangeRequirement="dcd96125-898e-4ff0-b294-eb02afe953aa" />
<Requirement applicability="import" requirement="recommended" exchangeRequirement="dcd96125-898e-4ff0-b294-eb02afe953aa" />
</Requirements>
</Concept>
<Concept uuid="c4477c56-5b8f-4064-abde-041994b4a3ca" name="Object Typing" status="sample" override="false">
<Template ref="35a2e10e-20df-40f4-ab2f-dacf0a6744f4" />
</Concept>
<Concept uuid="4ced4638-8e6a-41b9-9736-0624a0c20b72" name="Object Predefined Type" status="sample" override="false">
<Template ref="25248261-98df-4d0a-9364-5653575ca421" />
</Concept>
<Concept uuid="5f6fb7ae-4fcd-45ff-8e56-d87504fef240" name="Object User Identity" status="sample" override="false">
<Template ref="c19ec186-9cfd-47fc-a4d4-9fb35008d04a" />
</Concept>
</Concepts>
</ConceptRoot>
<xs:element name="IfcBuildingStorey" type="ifc:IfcBuildingStorey" substitutionGroup="ifc:IfcSpatialStructureElement" nillable="true"/>
<xs:complexType name="IfcBuildingStorey">
<xs:complexContent>
<xs:extension base="ifc:IfcSpatialStructureElement">
<xs:attribute name="Elevation" type="ifc:IfcLengthMeasure" use="optional"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
ENTITY IfcBuildingStorey
SUBTYPE OF (IfcSpatialStructureElement);
Elevation : OPTIONAL IfcLengthMeasure;
END_ENTITY;
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