Classification

IfcColumn

Namespace URI

http://identifier.buildingsmart.org/uri/buildingsmart/ifc-4.3/class/IfcColumn

Domain

IFC

Domain version

4.3

Domain state

Preview

Parent classification

Description

An IfcColumn is a vertical structural or architectural member which often is aligned with a structural grid intersection. In most cases it represents a vertical, or nearly vertical, structural member that transmits, through compression, the weight of the structure above to other structural elements below. It may also represent such a member from an architectural point of view in which case it may represent a non load bearing element. Whether it is a structural load bearing element or a non-load bearing element is determined by the Pset_ColumnCommon.LoadBearing property.There are two main representations for column occurrences:IfcColumn with IfcMaterialProfileSetUsage is used for all occurrences of columns, that have a profile defined that is swept along a directrix. The profile might change uniformly by a taper definition along the directrix. The profile parameter and its cardinal point of insertion can be fully described by the IfcMaterialProfileSetUsage. These columns are always represented geometricly by an 'Axis' and a 'SweptSolid' or 'AdvancedSweptSolid' shape representation (or by a 'Clipping' geometry based on the swept solid), if a 3D geometric representation is assigned. IfcColumn is used for all other occurrences of columns, particularly for columns with changing profile sizes along the extrusion, or columns defined by non-linear extrusion, or columns having only 'Brep', or 'SurfaceModel' geometry, if a more parametric representation is not intended.For any longitudial structural member, not constrained to be predominately horizontal nor vertical, or where this semantic information is irrelevant, the entity IfcMember exists.REFERENCE Definition according to ISO 6707-1 structural member of slender form, usually vertical, that transmits to its base the forces, primarily in compression, that are applied to it. NOTE The entity IfcColumnStandardCase has been deleted, IfcColumn with IfcMaterialProfileSetUsage is used instead. NOTE The representation of a column in a structural analysis model is provided by IfcStructuralCurveMember being part of an IfcStructuralAnalysisModel. HISTORY New entity in IFC1.0

Properties

Date erected.

Production date (stripped from form).

Defines a unique location within a structure, the ‘slot’ into which the piece was installed. Where pieces share the same piece mark, they can be interchanged. The value is only known after erection.

Enumeration defining where the assembly is intended to take place, either in a factory, other offsite location or on the building site.

The angle, in radians, by which the formwork at the ending face of a piece is to be rotated from the vertical in order to compensate for the rotation of the face that will occur once the piece is stripped from its form, inducing camber due to eccentric prestressing.

The angle, in radians, by which the formwork at the starting face of a piece is to be rotated from the vertical in order to compensate for the rotation of the face that will occur once the piece is stripped from its form, inducing camber due to eccentric prestressing.

The camber deflection, measured from the midpoint of a cambered face of a piece to the midpoint of the chord joining the ends of the same face, as shown in the figure below, divided by the original (nominal) straight length of the face of the piece.

The method of casting the concrete into its designed form.

The protective concrete cover at the reinforcing bars according to local building regulations.

The protective concrete cover at the reinforcement links according to local building regulations.

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