IFC 4.3.1.0 (IFC4X3_ADD1) development

7.11.4.5 Pset_PrecastConcreteElementGeneral

7.11.4.5.1 Semantic definition

Production and manufacturing related properties common to different types of precast concrete elements. The Pset can be used by a number of subtypes of IfcBuildingElement. If the precast concrete element is a sandwich wall panel each structural layer or shell represented by an IfcBuildingElementPart may be attached to a separate Pset of this type, if needed. Some of the properties apply only for specific types of precast concrete elements.

7.11.4.5.2 Applicable entities

7.11.4.5.3 Properties

Name Property Type Data Type Description
TypeDesignation IfcPropertySingleValue IfcLabel

Type designator for the element. The content depends on local standards. Eg. 'Bull nose', 'Half batter', 'Dropper', 'Chamfer' etc

CornerChamfer IfcPropertySingleValue IfcPositiveLengthMeasure

The chamfer in the corners of the precast element. The chamfer is presumed to be equal in both directions.

ManufacturingToleranceClass IfcPropertySingleValue IfcLabel

Classification designation of the manufacturing tolerances according to local standards.

FormStrippingStrength IfcPropertySingleValue IfcPressureMeasure

The minimum required compressive strength of the concrete at form stripping time.

LiftingStrength IfcPropertySingleValue IfcPressureMeasure

The minimum required compressive strength of the concrete when the concrete element is lifted.

ReleaseStrength IfcPropertySingleValue IfcPressureMeasure

The minimum required compressive strength of the concrete when the tendon stress is released. This property applies to prestressed concrete elements only.

MinimumAllowableSupportLength IfcPropertySingleValue IfcPositiveLengthMeasure

The minimum allowable support length.

InitialTension IfcPropertySingleValue IfcPressureMeasure

The initial stress of the tendon. This property applies to prestressed concrete elements only.

TendonRelaxation IfcPropertySingleValue IfcPositiveRatioMeasure

The maximum allowable relaxation of the tendon (usually expressed as %/1000 h).This property applies to prestressed concrete elements only.

TransportationStrength IfcPropertySingleValue IfcPressureMeasure

The minimum required compressive strength of the concrete required for transportation.

SupportDuringTransportDescription IfcPropertySingleValue IfcText

Textual description of how the concrete element is supported during transportation.

SupportDuringTransportDocReference IfcPropertyReferenceValue IfcExternalReference

Reference to an external document defining how the concrete element is supported during transportation.

HollowCorePlugging IfcPropertySingleValue IfcLabel

A descriptive label for how the hollow core ends are treated: they may be left open, closed with a plug, or sealed with cast concrete. Values would be, for example: 'Unplugged', 'Plugged', 'SealedWithConcrete'. This property applies to hollow core slabs only.

CamberAtMidspan IfcPropertySingleValue IfcRatioMeasure

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.

BatterAtStart IfcPropertySingleValue IfcPlaneAngleMeasure

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.

BatterAtEnd IfcPropertySingleValue IfcPlaneAngleMeasure

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.

Twisting IfcPropertySingleValue IfcPlaneAngleMeasure

The angle, in radians, through which the end face of a precast piece is rotated with respect to its starting face, along its longitudinal axis, as a result of non-aligned supports. This measure is also termed the ‘warping’ angle.

Shortening IfcPropertySingleValue IfcRatioMeasure

The ratio of the distance by which a precast piece is shortened after release from its form (due to compression induced by prestressing) to its original (nominal) length.

PieceMark IfcPropertySingleValue IfcLabel

Defines a unique piece for production purposes. All pieces with the same piece mark value are identical and interchangeable. The piece mark may be composed of sub-parts that have specific locally defined meaning (e.g. B-1A may denote a beam, of generic type ‘1’ and specific shape ‘A’).

DesignLocationNumber IfcPropertySingleValue IfcLabel

Defines a unique location within a structure, the ‘slot’ for which the piece was designed.

Table 7.11.4.5.A

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7.11.4.5.4 Changelog

7.11.4.5.4.1 IFC4

7.11.4.5.4.2 IFC4.3_DEV_9f90c1f0