 | Treppenlauf |
 | Stair Flight |
 | Vol茅e d'escalier |
| Item | SPF | XML | Change | Description | IFC2x3 to IFC4 |
|---|---|---|---|---|
| IfcStairFlight | ||||
| OwnerHistory | MODIFIED | Instantiation changed to OPTIONAL. | ||
| PredefinedType | ADDED | IFC4 Addendum 1 | ||
| IfcStairFlight | ||||
| NumberOfRisers | MODIFIED | Name changed from NumberOfRiser to NumberOfRisers. Type changed from INTEGER to IfcInteger. | ||
| NumberOfTreads | MODIFIED | Type changed from INTEGER to IfcInteger. |
A stair flight is an assembly of building components in a single "run" of stair steps (not interrupted by a landing). The stair steps and any stringers are included in the stair flight. A winder is also regarded a part of a stair flight.
An IfcStairFlight is normally aggregated by an IfcStair through the IfcRelAggregates relationship, the stair flight is then included in the set of IfcRelAggregates.RelatedObjects. An IfcStairFlight normally connects the floor slab of zero to two different storeys (or partial storeys, or landings) within a building. The connection relationship between the IfcStairFlight and the IfcSlab can be expressed using the IfcRelConnectsElements relationship.
HISTORY New entity in IFC2.0.
| # | Attribute | Type | Cardinality | Description | G |
|---|---|---|---|---|---|
| 9 | NumberOfRisers | IfcInteger | ? |
Number of the risers included in the stair flight
IFC4 CHANGE The attribute has been deprecated it shall only be exposed with a NIL value. Use Pset_StairFlightCommon.NumberOfRisers instead. | X |
| 10 | NumberOfTreads | IfcInteger | ? |
Number of treads included in the stair flight.
IFC4 CHANGE The attribute has been deprecated it shall only be exposed with a NIL value. Use Pset_StairFlightCommon.NumberOfTreads instead. | X |
| 11 | RiserHeight | IfcPositiveLengthMeasure | ? |
Vertical distance from tread to tread. The riser height is supposed to be equal for all stairs in a stair flight.
IFC4 CHANGE The attribute has been deprecated it shall only be exposed with a NIL value. Use Pset_StairFlightCommon.RiserHeight instead. | X |
| 12 | TreadLength | IfcPositiveLengthMeasure | ? |
Horizontal distance from the front to the back of the tread. The tread length is supposed to be equal for all steps of the stair flight.
IFC4 CHANGE The attribute has been deprecated it shall only be exposed with a NIL value. Use Pset_StairFlightCommon.TreadLength instead. | X |
| 13 | PredefinedType | IfcStairFlightTypeEnum | ? |
Predefined generic type for a stair flight that is specified in an enumeration. There may be a property set given specificly for the predefined types.
NOTE The PredefinedType shall only be used, if no IfcStairFlightType is assigned, providing its own IfcStairFlightType.PredefinedType. IFC4 CHANGE The attribute has been added at the end of the entity definition. | X |
| Rule | Description |
|---|---|
| CorrectPredefinedType | Either the PredefinedType attribute is unset (e.g. because an IfcStairFlightType is associated), or the inherited attribute ObjectType shall be provided, if the PredefinedType is set to USERDEFINED. |
| CorrectTypeAssigned | Either there is no stair flight type object associated, i.e. the IsTypedBy inverse relationship is not provided, or the associated type object has to be of type IfcStairFlightType. |
| # | Attribute | Type | Cardinality | Description | G |
|---|---|---|---|---|---|
| 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. | X | |
| 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. | X | |
| 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 |
| IsDeclaredBy | IfcRelDefinesByObject @RelatedObjects | S[0:1] | Link to the relationship object pointing to the declaring object that provides the object definitions for this object occurrence. The declaring object has to be part of an object type decomposition. The associated IfcObject, or its subtypes, contains the specific information (as part of a type, or style, definition), that is common to all reflected instances of the declaring IfcObject, or its subtypes.
IFC4 CHANGE New inverse relationship, change made with upward compatibility for file based exchange. | X | |
| Declares | IfcRelDefinesByObject @RelatingObject | S[0:?] | Link to the relationship object pointing to the reflected object(s) that receives the object definitions. The reflected object has to be part of an object occurrence decomposition. The associated IfcObject, or its subtypes, provides the specific information (as part of a type, or style, definition), that is common to all reflected instances of the declaring IfcObject, or its subtypes.
IFC4 CHANGE New inverse relationship, change made with upward compatibility for file based exchange. | 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 |
| ReferencedBy | IfcRelAssignsToProduct @RelatingProduct | S[0:?] | Reference to the IfcRelAssignsToProduct relationship, by which other products, processes, controls, resources or actors (as subtypes of IfcObjectDefinition) can be related to this product. | X | |
| IfcElement | |||||
| 8 | Tag | IfcIdentifier | ? | The tag (or label) identifier at the particular instance of a product, e.g. the serial number, or the position number. It is the identifier at the occurrence level. | X |
| FillsVoids | IfcRelFillsElement @RelatedBuildingElement | S[0:1] | Reference to the IfcRelFillsElement Relationship that puts the element as a filling into the opening created within another element. | X | |
| ConnectedTo | IfcRelConnectsElements @RelatingElement | S[0:?] | Reference to the element connection relationship. The relationship then refers to the other element to which this element is connected to. | X | |
| IsInterferedByElements | IfcRelInterferesElements @RelatedElement | S[0:?] | Reference to the interference relationship to indicate the element that is interfered. The relationship, if provided, indicates that this element has an interference with one or many other elements.
NOTE There is no indication of precedence between IsInterferedByElements and InterferesElements. IFC4 CHANGE New inverse relationship. | X | |
| InterferesElements | IfcRelInterferesElements @RelatingElement | S[0:?] | Reference to the interference relationship to indicate the element that interferes. The relationship, if provided, indicates that this element has an interference with one or many other elements.
NOTE There is no indication of precedence between IsInterferedByElements and InterferesElements. IFC4 CHANGE New inverse relationship. | X | |
| HasProjections | IfcRelProjectsElement @RelatingElement | S[0:?] | Projection relationship that adds a feature (using a Boolean union) to the IfcBuildingElement. | X | |
| ReferencedInStructures | IfcRelReferencedInSpatialStructure @RelatedElements | S[0:?] | Reference relationship to the spatial structure element, to which the element is additionally associated. This relationship may not be hierarchical, an element may be referenced by zero, one or many spatial structure elements.
IFC2x3 CHANGE The inverse attribute has been added with upward compatibility for file based exchange. | X | |
| HasOpenings | IfcRelVoidsElement @RelatingBuildingElement | S[0:?] | Reference to the IfcRelVoidsElement relationship that creates an opening in an element. An element can incorporate zero-to-many openings. For each opening, that voids the element, a new relationship IfcRelVoidsElement is generated. | X | |
| IsConnectionRealization | IfcRelConnectsWithRealizingElements @RealizingElements | S[0:?] | Reference to the connection relationship with realizing element. The relationship, if provided, assigns this element as the realizing element to the connection, which provides the physical manifestation of the connection relationship. | X | |
| ProvidesBoundaries | IfcRelSpaceBoundary @RelatedBuildingElement | S[0:?] | Reference to space boundaries by virtue of the objectified relationship IfcRelSpaceBoundary. It defines the concept of an element bounding spaces. | X | |
| ConnectedFrom | IfcRelConnectsElements @RelatedElement | S[0:?] | Reference to the element connection relationship. The relationship then refers to the other element that is connected to this element. | X | |
| ContainedInStructure | IfcRelContainedInSpatialStructure @RelatedElements | S[0:1] | Containment relationship to the spatial structure element, to which the element is primarily associated. This containment relationship has to be hierachical, i.e. an element may only be assigned directly to zero or one spatial structure. | X | |
| HasCoverings | IfcRelCoversBldgElements @RelatingBuildingElement | S[0:?] | Reference to IfcCovering by virtue of the objectified relationship IfcRelCoversBldgElement. It defines the concept of an element having coverings associated. | X | |
| IfcBuildingElement | |||||
| IfcStairFlight | |||||
| 9 | NumberOfRisers | IfcInteger | ? |
Number of the risers included in the stair flight
IFC4 CHANGE The attribute has been deprecated it shall only be exposed with a NIL value. Use Pset_StairFlightCommon.NumberOfRisers instead. | X |
| 10 | NumberOfTreads | IfcInteger | ? |
Number of treads included in the stair flight.
IFC4 CHANGE The attribute has been deprecated it shall only be exposed with a NIL value. Use Pset_StairFlightCommon.NumberOfTreads instead. | X |
| 11 | RiserHeight | IfcPositiveLengthMeasure | ? |
Vertical distance from tread to tread. The riser height is supposed to be equal for all stairs in a stair flight.
IFC4 CHANGE The attribute has been deprecated it shall only be exposed with a NIL value. Use Pset_StairFlightCommon.RiserHeight instead. | X |
| 12 | TreadLength | IfcPositiveLengthMeasure | ? |
Horizontal distance from the front to the back of the tread. The tread length is supposed to be equal for all steps of the stair flight.
IFC4 CHANGE The attribute has been deprecated it shall only be exposed with a NIL value. Use Pset_StairFlightCommon.TreadLength instead. | X |
| 13 | PredefinedType | IfcStairFlightTypeEnum | ? |
Predefined generic type for a stair flight that is specified in an enumeration. There may be a property set given specificly for the predefined types.
NOTE The PredefinedType shall only be used, if no IfcStairFlightType is assigned, providing its own IfcStairFlightType.PredefinedType. IFC4 CHANGE The attribute has been added at the end of the entity definition. | X |
Object Typing
The Object Typing concept template applies to this entity as shown in Table 176.
| ||||
Table 176 — IfcStairFlight Object Typing |
Property Sets for Objects
The Property Sets for Objects concept template applies to this entity as shown in Table 177.
Quantity Sets
The Quantity Sets concept template applies to this entity as shown in Table 178.
| ||||
Table 178 — IfcStairFlight Quantity Sets |
Material Solid
The Material Single concept applies to this entity.
The material of the IfcStairFlight is defined by the IfcMaterial and attached by the IfcRelAssociatesMaterial.RelatingMaterial. It is accessible by the inverse HasAssociations relationship.
Spatial Containment
The Spatial Containment concept template applies to this entity as shown in Table 179.
| ||||||||
Table 179 — IfcStairFlight Spatial Containment |
The IfcStairFlight, as any subtype of IfcBuildingElement, may participate alternatively in one of the two different containment relationships:
NOTE Model view definitions or implementer agreements may force an IfcStairFlight to be solely used as a part within an IfcStair container. In this case, no Spatial containment shall be used.
Axis 2D Geometry
The Axis 2D Geometry concept applies to this entity.
The walking line is represented by a two-dimensional open curve as the axis. The curve is directed into the upward direction (direction has to be interpreted as specified at the subtypes of IfcCurve).
Figure 252 illustrates the axis representation which has the following constraints:
 |
Figure 252 — Stair flight axis |
Footprint Geometry
The FootPrint Geometry concept template applies to this entity as shown in Table 180.
| ||||||||||||
Table 180 — IfcStairFlight FootPrint Geometry |
The flight foot print, including the flight boundary is represented by a two-dimensional geometric curve set.
Figure 253 illustrates the footprint representation which has the following constraints:
 |
Figure 253 — Stair flight footprint |
Body SweptSolid Geometry
The Body SweptSolid Geometry concept applies to this entity.
Figure 254 illustrates the 'Body' geometric representation using a 'SweptSolid' representation type.
 |
Figure 254 — Stair flight body |
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="b773e537-f2ff-4b83-ad38-5444def76d7b" name="IfcStairFlight" status="sample" applicableRootEntity="IfcStairFlight">
<Applicability uuid="00000000-0000-0000-0000-000000000000" status="sample">
<Template ref="50593c2c-360e-47ac-ac60-1b1a6e8f460e" />
<TemplateRules operator="and" />
</Applicability>
<Concepts>
<Concept uuid="ad8ef14d-3bd7-447a-86f9-aeaab8e0ff37" name="Object Typing" status="sample" override="false">
<Template ref="35a2e10e-20df-40f4-ab2f-dacf0a6744f4" />
<TemplateRules operator="and">
<TemplateRule Parameters="RelatingType[Type]='IfcStairFlightType'" />
</TemplateRules>
</Concept>
<Concept uuid="d810668e-cf0a-44cd-8cbb-6d5b01f87da9" name="Property Sets for Objects" status="sample" override="false">
<Template ref="f74255a6-0c0e-4f31-84ad-24981db62461" />
<TemplateRules operator="and">
<TemplateRule Parameters="PsetName[Value]='Pset_StairFlightCommon'" />
<TemplateRule Parameters="PsetName[Value]='Pset_ConcreteElementGeneral'" />
<TemplateRule Parameters="PsetName[Value]='Pset_PrecastConcreteElementFabrication'" />
<TemplateRule Parameters="PsetName[Value]='Pset_PrecastConcreteElementGeneral'" />
</TemplateRules>
</Concept>
<Concept uuid="536329e4-81b9-4a88-b0af-c843b1269ad6" name="Quantity Sets" status="sample" override="false">
<Template ref="6652398e-6579-4460-8cb4-26295acfacc7" />
<TemplateRules operator="and">
<TemplateRule Parameters="QsetName[Value]='Qto_StairFlightBaseQuantities'" />
</TemplateRules>
</Concept>
<Concept uuid="dd1790a7-a4c0-4725-a303-a737578f85c0" name="Material Solid" status="sample" override="false">
<Template ref="5f39a814-44a0-4fb3-8dc6-ddaa0560fc54" />
</Concept>
<Concept uuid="42f27c5d-f2c7-4e70-b554-c50b2f035996" name="Spatial Containment" status="sample" override="false">
<Template ref="d9a3f822-0014-4bc2-8d94-9d9067759045" />
<TemplateRules operator="and">
<TemplateRule Description="Default spatial container, if the stair flight is not used (by default) as a part within a stair container." Parameters="RelatingStructure[Type]='IfcBuildingStorey'" />
<TemplateRule Description="Spatial container for the element if it cannot be assigned to a building storey." Parameters="RelatingStructure[Type]='IfcBuilding'" />
<TemplateRule Description="Spatial container for the element in case that it is placed on site (outside of building)" Parameters="RelatingStructure[Type]='IfcSite'" />
</TemplateRules>
</Concept>
<Concept uuid="36a10ec4-1210-45d1-b032-ab0628455d03" name="Axis 2D Geometry" status="sample" override="false">
<Template ref="782444e8-d681-475a-9034-a9e7f53c6d65" />
</Concept>
<Concept uuid="896717fa-f1fb-4dc7-94cb-d0ba606bb3da" name="Footprint Geometry" status="sample" override="false">
<Template ref="4f5777d7-68e9-459c-aa2c-46adf3e88d31" />
</Concept>
<Concept uuid="13920d7d-61d9-43d1-9a0d-9666fefd9395" name="Body SweptSolid Geometry" status="sample" override="false">
<Template ref="cb7c18fa-cf83-4db1-be1b-c013ba4ed672" />
</Concept>
</Concepts>
</ConceptRoot>
| # | Concept | Template | Model View |
|---|---|---|---|
| IfcRoot | |||
| Identity | Software Identity | General Usage | |
| Revision Control | Revision Control | General Usage | |
| IfcObjectDefinition | |||
| Classification Association | Classification Association | General Usage | |
| IfcObject | |||
| Object User Identity | Object User Identity | General Usage | |
| Object Predefined Type | Object Predefined Type | General Usage | |
| Property Sets with Override | Property Sets with Override | General Usage | |
| IfcProduct | |||
| Product Placement | Product Placement | General Usage | |
| Product Geometric Representation | Product Geometric Representation | General Usage | |
| IfcElement | |||
| Product Local Placement | Product Local Placement | General Usage | |
| CoG Geometry | CoG Geometry | General Usage | |
| Box Geometry | Box Geometry | General Usage | |
| Body SurfaceOrSolidModel Geometry | Body SurfaceOrSolidModel Geometry | General Usage | |
| Body SurfaceModel Geometry | Body SurfaceModel Geometry | General Usage | |
| Body Tessellation Geometry | Body Tessellation Geometry | General Usage | |
| Body Brep Geometry | Body Brep Geometry | General Usage | |
| Body AdvancedBrep Geometry | Body AdvancedBrep Geometry | General Usage | |
| Body CSG Geometry | Body CSG Geometry | General Usage | |
| Mapped Geometry | Mapped Geometry | General Usage | |
| Element Voiding | Element Voiding | General Usage | |
| Element Projecting | Element Projecting | General Usage | |
| IfcBuildingElement | |||
| Product Assignment | Product Assignment | General Usage | |
| Surface 3D Geometry | Surface 3D Geometry | General Usage | |
| IfcStairFlight | |||
| Object Typing | Object Typing | General Usage | |
| Property Sets for Objects | Property Sets for Objects | General Usage | |
| Quantity Sets | Quantity Sets | General Usage | |
| Material Solid | Material Single | General Usage | |
| Spatial Containment | Spatial Containment | General Usage | |
| Axis 2D Geometry | Axis 2D Geometry | General Usage | |
| Footprint Geometry | FootPrint Geometry | General Usage | |
| Body SweptSolid Geometry | Body SweptSolid Geometry | General Usage | |
<xs:element name="IfcStairFlight" type="ifc:IfcStairFlight" substitutionGroup="ifc:IfcBuildingElement" nillable="true"/>
<xs:complexType name="IfcStairFlight">
<xs:complexContent>
<xs:extension base="ifc:IfcBuildingElement">
<xs:attribute name="NumberOfRisers" type="ifc:IfcInteger" use="optional"/>
<xs:attribute name="NumberOfTreads" type="ifc:IfcInteger" use="optional"/>
<xs:attribute name="RiserHeight" type="ifc:IfcPositiveLengthMeasure" use="optional"/>
<xs:attribute name="TreadLength" type="ifc:IfcPositiveLengthMeasure" use="optional"/>
<xs:attribute name="PredefinedType" type="ifc:IfcStairFlightTypeEnum" use="optional"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
ENTITY IfcStairFlight
SUBTYPE OF (IfcBuildingElement);
NumberOfRisers : OPTIONAL IfcInteger;
NumberOfTreads : OPTIONAL IfcInteger;
RiserHeight : OPTIONAL IfcPositiveLengthMeasure;
TreadLength : OPTIONAL IfcPositiveLengthMeasure;
PredefinedType : OPTIONAL IfcStairFlightTypeEnum;
WHERE
CorrectPredefinedType : NOT(EXISTS(PredefinedType)) OR
(PredefinedType <> IfcStairFlightTypeEnum.USERDEFINED) OR
((PredefinedType = IfcStairFlightTypeEnum.USERDEFINED) AND EXISTS (SELF\IfcObject.ObjectType));
CorrectTypeAssigned : (SIZEOF(IsTypedBy) = 0) OR
('IFCSHAREDBLDGELEMENTS.IfcStairFlightType' IN TYPEOF(SELF\IfcObject.IsTypedBy[1].RelatingType));
END_ENTITY;
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