Classification

IfcBeam

Namespace URI

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

Domain

IFC

Domain version

4.3

Domain state

Preview

Parent classification

Description

An IfcBeam is typically a horizontal, or nearly horizontal, structural member that is capable of withstanding load primarily by resisting bending. It may also represent such a member from an architectural point of view. It is not required to be load bearing.There are two main representations for beam occurrences:IfcBeam with IfcMaterialProfileSetUsage is used for all occurrences of beams, 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 beams 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. IfcBeam without IfcMaterialProfileSetUsage is used for all other occurrences of beams, particularly for beams with non-uniformly changing profile sizes along the sweep, or beams having only 'AdvancedBrep', 'Brep', or 'SurfaceModel' geometry, if a more parametric representation is not intended.For any other longitudinal structural member, not constrained to be predominately horizontal nor vertical, or where this semantic information is irrelevant, the entity IfcMember should be used.REFERENCE Definition according to ISO 6707-1: structural member for carrying load(s) between or beyond points of support, usually narrow in relation to its length and horizontal or nearly so. NOTE The entity IfcBeamStandardCase has been deleted, IfcBeam with IfcMaterialProfileSetUsage is used instead. NOTE The representation of load-bearing beams in a structural analysis model is provided by subtypes of IfcStructuralMember (with IfcStructuralCurveMember being mostly applicable) as part of an IfcStructuralAnalysisModel. The camber of a beam may be defined by assigning an IfcStructuralCurveMember with displacement coordinates. Multiple sets of camber ordinates may be provided that are qualified by the particular load case, where full dead load would typically be used for fabrication, and other scenarios used for other loading conditions such as during construction. 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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