IFC 4.3.x development

8.19.3.10 IfcStructuralLoadConfiguration

Change log

IFC4

added

IFC4X2

modificationsattributes Locations definitionChanged from list[1:?] of unique list[1:2] of IfcLengthMeasure to list[1:?] of list[1:2] of IfcLengthMeasure

IFC4X3_RC3

modificationsattributes Locations definitionChanged from list[1:?] of list[1:2] of IfcLengthMeasure to list[1:?] of unique list[1:2] of IfcLengthMeasure

8.19.3.10.1 Semantic definitions at the entity

This class combines one or more load or result values in a 1- or 2-dimensional configuration.

HISTORY  New entity in IFC4.

Informal Propositions:

  1. All items in Values shall be of the same type.
  2. If the loads or results comprise a curve activity, 1-dimensional locations shall be given, measured locally along the curve. The location shall not exceed the bounds of the curve actvity. The load samples and corresponding locations shall be given in ascending order of locations.
  3. If the loads or results comprise a surface activity, 2-dimensional locations shall be given, measured in the surface activity's local x and y directions. The location shall not exceed the bounds of the surface activity.

NOTE  There are no ordering requirements in the 2-dimensional case, but the 1-dimensional case shall be spatially ordered for simplicity.

8.19.3.10.1 Attributes

#Attribute Type Description
IfcStructuralLoad
1Name OPTIONAL IfcLabel Optionally defines a name for this load.
IfcStructuralLoadConfiguration
2Values LIST [1:?] OF IfcStructuralLoadOrResult List of load or result values.
3Locations OPTIONAL LIST [1:?] OF UNIQUE LIST [1:2] OF IfcLengthMeasureLocations of the load samples or result samples, given within the local coordinate system defined by the instance which uses this resource object. Each item in the list of locations pertains to the values list item at the same list index. This attribute is optional for configurations in which the locations are implicitly known from higher-level definitions.

8.19.3.10.2 Entity inheritance

dot_inheritance IfcStructuralLoadConfiguration IfcStructuralLoadConfiguration IfcStructuralLoad IfcStructuralLoad IfcStructuralLoadConfiguration->IfcStructuralLoad IfcStructuralLoadOrResult IfcStructuralLoadOrResult IfcStructuralLoadOrResult->IfcStructuralLoad

8.19.3.10.3 Formal representations

ENTITY IfcStructuralLoadConfiguration
 SUBTYPE OF (IfcStructuralLoad);
	Values : LIST [1:?] OF IfcStructuralLoadOrResult;
	Locations : OPTIONAL LIST [1:?] OF UNIQUE LIST [1:2] OF IfcLengthMeasure;
 WHERE
	ValidListSize : NOT EXISTS(Locations) OR (SIZEOF(Locations) = SIZEOF(Values));
END_ENTITY;