IFC (IFC4X3) development IfcParameterizedProfileDef

ABSTRACT This definition may not be instantiated Semantic definition

The parameterized profile definition defines a 2D position coordinate system to which the parameters of the different profiles relate to. All profiles are defined centric to the origin of the position coordinate system, or more specific, the origin [0.,0.] shall be in the center of the bounding box of the profile.

The Position attribute of IfcParameterizedProfileDef is used to position the profile within the XY plane of the underlying coordinate system of the swept surface geometry, the swept area solid or the sectioned spine. It can be used to position the profile at any point which becomes the origin [0.,0.,0.] of the extruded or rotated surface or solid.

The Position attribute should not be used if the transformation can be specified in a containing object instead. In particular, this applies if the IfcParameterizedProfileDef is referenced as SweptArea in subtypes of IfcSweptAreaSolid or as CrossSections in IfcSectionedSpine.

Several subtypes of IfcParameterizedProfileDef provide shape parameters which are optional. Sending systems should always provide values for these parameters if possible. If these parameters are left unspecified, receiving systems may retrieve values for them by external reference (if a reference to an external document or library is given; see guidance at IfcProfileDef), or estimate them, or simply assume zero values. Entity inheritance Attributes

# Attribute Type Description
IfcProfileDef (4)
1 ProfileType IfcProfileTypeEnum

Defines the type of geometry into which this profile definition shall be resolved, either a curve or a surface area. In case of curve the profile should be referenced by a swept surface, in case of area the profile should be referenced by a swept area solid.

2 ProfileName OPTIONAL IfcLabel

Human-readable name of the profile, for example according to a standard profile table. As noted above, machine-readable standardized profile designations should be provided in IfcExternalReference.ItemReference.

HasExternalReference SET [0:?] OF IfcExternalReferenceRelationship FOR RelatedResourceObjects

Reference to external information, e.g. library, classification, or document information, which is associated with the profile.

HasProperties SET [0:?] OF IfcProfileProperties FOR ProfileDefinition

Additional properties of the profile, for example mechanical properties.

Click to show 4 hidden inherited attributes Click to hide 4 inherited attributes
IfcParameterizedProfileDef (1)
3 Position OPTIONAL IfcAxis2Placement2D

Position coordinate system of the parameterized profile definition. If unspecified, no translation and no rotation is applied.

Table Property sets

  • Pset_ProfileMechanical
    • MassPerLength
    • CrossSectionArea
    • Perimeter
    • MinimumPlateThickness
    • MaximumPlateThickness
    • CentreOfGravityInX
    • CentreOfGravityInY
    • ShearCentreZ
    • ShearCentreY
    • MomentOfInertiaY
    • MomentOfInertiaZ
    • MomentOfInertiaYZ
    • TorsionalConstantX
    • WarpingConstant
    • ShearDeformationAreaZ
    • ShearDeformationAreaY
    • MaximumSectionModulusY
    • MinimumSectionModulusY
    • MaximumSectionModulusZ
    • MinimumSectionModulusZ
    • TorsionalSectionModulus
    • ShearAreaZ
    • ShearAreaY
    • PlasticShapeFactorY
    • PlasticShapeFactorZ Concept usage

Concept Usage Description
IfcProfileDef (1)
Property Sets for Profiles General

This concept can be applied to the following resources:

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Table Formal representation

ENTITY IfcParameterizedProfileDef
 SUBTYPE OF (IfcProfileDef);
	Position : OPTIONAL IfcAxis2Placement2D;
END_ENTITY; References

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  • attribute Position optional, Changed from "False" to "True"