IfcColumnStandardCase

Item	SPF	XML	Change	Description
IFC2x3 to IFC4
IfcColumnStandardCase			ADDED

Rule	Description
HasMaterialProfileSetUsage	A valid instance of IfcColumnStandardCase relies on the provision of an IfcMaterialProfileSetUsage.

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	C
IfcRoot
1	GlobalId	IfcGloballyUniqueId	[1:1]	Assignment of a globally unique identifier within the entire software world.	X
2	OwnerHistory	IfcOwnerHistory	[0:1]	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.	X
3	Name	IfcLabel	[0:1]	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	[0:1]	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).	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).	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.	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).	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).	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	[0:1]	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.	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.	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.	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.	X
IfcProduct
6	ObjectPlacement	IfcObjectPlacement	[0:1]	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	[0:1]	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	[0:1]	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.	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.	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.	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
IfcColumn
9	PredefinedType	IfcColumnTypeEnum	[0:1]	Predefined generic type for a column 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 IfcColumnType is assigned, providing its own IfcColumnType.PredefinedType.	X
IfcColumnStandardCase

Definitions applying to Common Use Definitions

Instance diagram

Concept usage

Material Profile Set Usage

The Material Profile Set Usage concept applies to this entity.

The IfcColumnStandardCase defines in addition that the IfcColumnType should have a unique IfcMaterialProfileSet, that is referenced by the IfcMaterialProfileSetUsage assigned to all occurrences of this IfcColumnType. Composite profile columns can be represented by refering to several IfcMaterialProfile's within the IfcMaterialProfileSet that is referenced from the IfcMaterialProfileSetUsage.

Figure 200 illustrates assignment of IfcMaterialProfileSetUsage and IfcMaterialProfileSet to the IfcColumnStandardCase as the column occurrence and to the IfcColumnType. The same IfcMaterialProfileSet shall be shared by many occurrences of IfcMaterialProfileSetUsage. This relationship shall be consistent to the relationship between the IfcColumnType and the IfcColumnStandardCase.

Figure 200 — Column profile usage

Figure 201 illustrates cardinal point alignment.

NOTE It has to be guaranteed that the use of IfcCardinalPointEnum is consistent to the placement of the extrusion body provided by IfcExtrudedAreaSolid.Position

NOTE The cardinal points 7 (top left), and 6 (mid-depth right) are assigned according to the definition at IfcCardinalPointReference

Figure 201 — Column cardinal points

Figure 202 illustrates assignment of a composite profile by using IfcCompositeProfile for geometric representation and several IfcMaterialProfile's within the IfcMaterialProfileSet. The number of IfcMaterialProfile's within the IfcMaterialProfileSet is restricted to maximal 2 and requires the use of IfcExtrudedAreaSolidTapered, or IfcRevolvedAreaSolidTapered for the correct 'Body' shape representation.

Figure 202 — Column composite profiles

Product Local Placement

The Product Local Placement concept applies to this entity as shown in Table 106.

Type	Relative	Description
IfcLocalPlacement	IfcLocalPlacement	Relative placement according to position and rotation relative to container.
IfcLocalPlacement		Absolute placement according to position and rotation of world coordinate system.
IfcGridPlacement		Placement according to grid intersection.

Table 106 — IfcColumnStandardCase Product Local Placement

The following restriction is imposed:

The local placement shall provide the location and directions for the standard column, the x/y plane is the plane for the start profile, and the z-axis is the extrusion axis for the column body (in case of rotation, the tangent direction).

Axis 3D Geometry

The Axis 3D Geometry concept applies to this entity as shown in Table 107.

Identifier	Type	Items	Description
Axis	Curve3D	IfcBoundedCurve	Three-dimensional reference curve for the column.

Table 107 — IfcColumnStandardCase Axis 3D Geometry

The following additional constraints apply to the 'Axis' representation, if the 'Body' shape representation has the RepresentationType : 'SweptSolid':

Axis
- IfcPolyline having two Points, or IfcTrimmedCurve with BasisCurve of Type IfcLine for 'SweptSolid' provided as IfcExtrudedAreaSolid. The axis curve lies on the z axis of the object coordinate system.
- IfcTrimmedCurve with BasisCurve of Type IfcCircle for 'SweptSolid' provided as IfcRevolvedAreaSolid. The axis curve lies on the x/z plane of the object coordinate system, the tangent at the start is along the positive z-axis.

	EXAMPLE As shown in Figure 202, the axis shall be defined along the z axis of the object coordinate system. The axis representation can be used to represent the system length of a column that may extent the body length of the column.
Figure 202 — Column axis representation

EXAMPLE As shown in Figure 203, the axis representation shall be used to represent the cardinal point as the offset between the 'Axis' and the extrusion path of the column. The extrusion path is provided as IfcExtrudedAreaSolid.ExtrudedDirection and should be parallel to the 'Axis'. It has to be guaranteed that the value provided by IfcMaterialProfileSetUsage.CardinalPoint is consistent to the IfcExtrudedAreaSolid.Position.

Figure 203 — Column axis cardinal point

Body SweptSolid Geometry

The Body SweptSolid Geometry concept applies to this entity.

The following additional constraints apply to the 'SweptSolid' representation:

Solid: IfcExtrudedAreaSolid, IfcRevolvedAreaSolid shall be supported
Profile: all subtypes of IfcProfileDef (with exception of IfcArbitraryOpenProfileDef)
Profile Position : For all single profiles, the IfcParameterizedProfileDef.Position shall be NIL, or having Location = 0.,0. and RefDirection = 1.,0.
Extrusion: perpendicular to the profile direction. The IfcExtrudedAreaSolid.ExtrudedDirection shall be [0.,0.,1.].
Orientation: The y-axis of the profile, as determined by IfcSweptAreaSolid.Position.P[2] shall point to the Y-Axis. It indicates the "role" of the column, a role=0° means y-axis of profile = Y-axis of reference coordinate system.

Figure 203 illustrates a standard geometric representation with cardinal point applied as 5 (mid-depth centre).

The following interpretation of dimension parameter applies for rectangular columns:

IfcRectangleProfileDef.YDim interpreted as column width
IfcRectangleProfileDef.XDim interpreted as column depth

The following interpretation of dimension parameter applies for circular columns:

IfcCircleProfileDef.Radius interpreted as column radius.

Figure 203 — Column body extrusion

Body AdvancedSweptSolid Geometry

The Body AdvancedSweptSolid Geometry concept applies to this entity.

The following additional constraints apply to the 'AdvancedSweptSolid' representation type:

Solid: IfcSurfaceCurveSweptAreaSolid, IfcFixedReferenceSweptAreaSolid, IfcExtrudedAreaSolidTapered, IfcRevolvedAreaSolidTapered shall be supported.
NOTE View definitions and implementer agreement can further constrain the allowed swept solid types.
Profile: see 'SweptSolid' geometric representation
Profile Position : see 'SweptSolid' geometric representation
Extrusion: not applicable

Body Clipping Geometry

The Body Clipping Geometry concept applies to this entity.

The following constraints apply to the 'Clipping' representation:

Solid: see 'SweptSolid' geometric representation
Profile: see 'SweptSolid' geometric representation
Profile Position : see 'SweptSolid' geometric representation
Extrusion: see 'SweptSolid' geometric representation
Orientation: see 'SweptSolid' geometric representation
Boolean result: The IfcBooleanClippingResult shall be supported, allowing for Boolean differences between the swept solid (here IfcExtrudedAreaSolid) and one or several IfcHalfSpaceSolid (or its subtypes).

Figure 204 illustrates a 'Clipping' geometric representation with use of IfcBooleanClippingResult between an IfcExtrudedAreaSolid and an IfcHalfSpaceSolid to create a clipped body, with cardinal point applied as 2 (bottom centre).

Figure 204 — Column body clipping

Concept inheritance

#	Concept	Model View
IfcRoot
	Software Identity	Common Use Definitions
	Revision Control	Common Use Definitions
IfcObject
	Object Occurrence Predefined Type	Common Use Definitions
IfcElement
	Box Geometry	Common Use Definitions
	FootPrint Geometry	Common Use Definitions
	Body SurfaceOrSolidModel Geometry	Common Use Definitions
	Body SurfaceModel Geometry	Common Use Definitions
	Body Tessellation Geometry	Common Use Definitions
	Body Brep Geometry	Common Use Definitions
	Body AdvancedBrep Geometry	Common Use Definitions
	Body CSG Geometry	Common Use Definitions
	Mapped Geometry	Common Use Definitions
	Mesh Geometry	Common Use Definitions
IfcBuildingElement
	Surface 3D Geometry	Common Use Definitions
IfcColumn
	Object Typing	Common Use Definitions
	Property Sets for Objects	Common Use Definitions
	Quantity Sets	Common Use Definitions
	Material Profile Set	Common Use Definitions
	Spatial Containment	Common Use Definitions
	Product Assignment	Common Use Definitions
IfcColumnStandardCase
	Material Profile Set Usage	Common Use Definitions
	Product Local Placement	Common Use Definitions
	Axis 3D Geometry	Common Use Definitions
	Body SweptSolid Geometry	Common Use Definitions
	Body AdvancedSweptSolid Geometry	Common Use Definitions
	Body Clipping Geometry	Common Use Definitions

Examples

Column extruded solid

Formal representations

XSD Specification

 <xs:element name="IfcColumnStandardCase" type="ifc:IfcColumnStandardCase" substitutionGroup="ifc:IfcColumn" nillable="true"/>

 <xs:complexType name="IfcColumnStandardCase">

  <xs:complexContent>

   <xs:extension base="ifc:IfcColumn"/>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcColumnStandardCase

 SUBTYPE OF (IfcColumn);

 WHERE

  HasMaterialProfileSetUsage : SIZEOF (QUERY(temp <* USEDIN(SELF, 'IFCKERNEL.IFCRELASSOCIATES.RELATEDOBJECTS') |
              ('IFCPRODUCTEXTENSION.IFCRELASSOCIATESMATERIAL' IN TYPEOF(temp)) AND
              ('IFCMATERIALRESOURCE.IFCMATERIALPROFILESETUSAGE' IN TYPEOF(temp.RelatingMaterial))
              )) = 1;
END_ENTITY;

 EXPRESS-G diagram

Link to this page

	Stütze / Pfeiler - Standard
	Column Standard Case
	Poteau standard

IfcColumnStandardCase

Semantic definitions at the entity

Inherited definitions from supertypes

Definitions applying to Common Use Definitions

Examples

Formal representations