IfcBoundaryFaceCondition

Definition from IAI: The entity IfcBoundaryFaceCondition describes boundary conditions that can be applied to structural face connections, either directly for the connection (e.g. the connecting face) or for the relation between a structural member and the connection.

The following conventions to the values of the LinearStiffnessByArea[X,Y,Z] apply:

- value (-1.) represents an infinitive large value – or a fixed connectivity with infinitive stiffness
- value zero (0.), represents no stiffness or a free connectivity
- any other value represents a finitive stiffness or spring connectivity in that direction or rotation
- value NIL ($) represents an unknown connectivity condition

> NOTE: Instances of the entity IfcBoundaryFaceCondition are used e.g., to define the boundary condition for instances of IfcStructuralFaceConnection or IfcRelConnectsStructuralMember pointing to a structural face connection.

> HISTORY: New entity in Release IFC2x edition 2.

EXPRESS specification:

ENTITY IfcBoundaryFaceCondition
SUBTYPE OF ( | IfcBoundaryCondition);
LinearStiffnessByAreaX | : | OPTIONAL IfcModulusOfSubgradeReactionMeasure;
LinearStiffnessByAreaY | : | OPTIONAL IfcModulusOfSubgradeReactionMeasure;
LinearStiffnessByAreaZ | : | OPTIONAL IfcModulusOfSubgradeReactionMeasure;
END_ENTITY;

Attribute definitions:

LinearStiffnessByAreaX | : | Linear stiffness value in x-direction of the coordinate system defined by the instance which uses this resource object.
LinearStiffnessByAreaY | : | Linear stiffness value in y-direction of the coordinate system defined by the instance which uses this resource object.
LinearStiffnessByAreaZ | : | Linear stiffness value in z-direction of the coordinate system defined by the instance which uses this resource object.

Inheritance graph

ENTITY IfcBoundaryFaceCondition;
ENTITY IfcBoundaryCondition;
Name | : | OPTIONAL IfcLabel;
ENTITY IfcBoundaryFaceCondition;
LinearStiffnessByAreaX | : | OPTIONAL IfcModulusOfSubgradeReactionMeasure;
LinearStiffnessByAreaY | : | OPTIONAL IfcModulusOfSubgradeReactionMeasure;
LinearStiffnessByAreaZ | : | OPTIONAL IfcModulusOfSubgradeReactionMeasure;
END_ENTITY;