Classification

IfcWall

Namespace URI

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

Domain

IFC

Domain version

4.3

Domain state

Preview

Parent classification

Description

The wall represents a vertical construction that may bound or subdivide spaces. Wall are usually vertical, or nearly vertical, planar elements, often designed to bear structural loads. A wall is however not required to be load bearing.{ .extDef}A wall may have openings, such as wall openings, openings used for windows or doors, or niches and recesses. They are defined by an IfcOpeningElement attached to the wall using the inverse relationship HasOpenings pointing to IfcRelVoidsElement. Walls with openings that have already been modeled within the enclosing geometry may use the relationship IfcRelConnectsElements to associate the wall with embedded elements such as doors and windows.There are two main representations for all occurrences:IfcWall with IfcMaterialLayerSetUsage is used for all occurrences of walls, that have a non-changing thickness along the wall path and where the thickness parameter can be fully described by a material layer set. These walls are always represented geometrically by an 'Axis' and a 'SweptSolid' shape representation (or by a 'Clipping' geometry based on 'SweptSolid'), if a 3D geometric representation is assigned. IfcWall without IfcMaterialLayerSetUsage is used for all other occurrences of wall, particularly for walls with changing thickness along the wall path (e.g. polygonal walls), or walls with a non-rectangular cross sections (e.g. L-shaped retaining walls), and walls having an extrusion axis that is unequal to the global Z axis of the project (i.e. non-vertical walls), or walls having only 'Brep', or 'SurfaceModel' geometry, or if a more parametric representation is not intended.REFERENCE Definition according to ISO 6707-1: vertical construction usually in masonry or in concrete which bounds or subdivides a construction works and fulfils a load bearing or retaining function. NOTE An arbitrary planar element to which this semantic information is not applicable (is not predominantly vertical), shall be modeled as IfcPlate. NOTE The entity IfcWallStandardCase has been deprecated, IfcWall with IfcMaterialLayerSetUsage is used instead. The entity IfcWallElementedCase has been deleted, IfcWall with IfcRelAggregates is used to describe occurrences of wall which are aggregated from subordinate elements, such as wall panels. NOTE There is a representation of walls for structural analysis provided by a proper subtype of IfcStructuralMember being part of the IfcStructuralAnalysisModel. HISTORY New entity in IFC1.0

Properties

Acoustic rating for this object. It is provided according to the national building code. It indicates the sound transmission resistance of this object by an index ratio (instead of providing full sound absorption values).

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.

Defines the type of the reinforcement bar allocation.

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.

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