IFC 4.3.0.1 (IFC4X3) development

4.3.1.2 Grid Attributes

Grids may be used to provide a layout reference for building elements.

The following diagram shows the generic classes and relationships used when applying this concept. In addition, concepts may have particular importance to common or standardised industry practices and scenarios. For these specific usage scenarios, the tables below shows a recommended list of general usage patterns that users may adopt.

G IfcGrid IfcGrid 1. GlobalId [1:1] 2. OwnerHistory [0:1] 3. Name [0:1] 4. Description [0:1]      HasAssignments [0:?]      Nests [0:1]      IsNestedBy [0:?]      HasContext [0:1]      IsDecomposedBy [0:?]      Decomposes [0:1]      HasAssociations [0:?] 5. ObjectType [0:1]      IsDeclaredBy [0:1]      Declares [0:?]      IsTypedBy [0:1]      IsDefinedBy [0:?] 6. ObjectPlacement [0:1] 7. Representation [0:1]      ReferencedBy [0:?]      PositionedRelativeTo [0:?]      ReferencedInStructures [0:?]      ContainedInStructure [0:1]      Positions [0:?] UAxes 8. UAxes [1:?] VAxes 9. VAxes [1:?] WAxes 10. WAxes [1:?] 11. PredefinedType [0:1] IfcGridTypeEnum IfcGridTypeEnum IfcGrid:PredefinedType1->IfcGridTypeEnum:IfcGridTypeEnum0 IfcGridAxis_0 IfcGridAxis 1. AxisTag [0:1] 2. AxisCurve [1:1] 3. SameSense [1:1]      PartOfW [0:1]      PartOfV [0:1]      PartOfU [0:1]      HasIntersections [0:?] IfcGrid:UAxes1->IfcGridAxis_0:IfcGridAxis0 IfcGridAxis_1 IfcGridAxis 1. AxisTag [0:1] 2. AxisCurve [1:1] 3. SameSense [1:1]      PartOfW [0:1]      PartOfV [0:1]      PartOfU [0:1]      HasIntersections [0:?] IfcGrid:VAxes1->IfcGridAxis_1:IfcGridAxis0 IfcGridAxis_2 IfcGridAxis 1. AxisTag [0:1] 2. AxisCurve [1:1] 3. SameSense [1:1]      PartOfW [0:1]      PartOfV [0:1]      PartOfU [0:1]      HasIntersections [0:?] IfcGrid:WAxes1->IfcGridAxis_2:IfcGridAxis0 IfcLabel_0 IfcLabel IfcGridAxis_0:AxisTag1->IfcLabel_0:IfcLabel0 IfcIndexedPolyCurve_0 IfcIndexedPolyCurve      LayerAssignment [0:1]      StyledByItem [0:1] 1. Points [1:1] 2. Segments [1:?] 3. SelfIntersect [1:1] IfcGridAxis_0:AxisCurve1->IfcIndexedPolyCurve_0:IfcIndexedPolyCurve0 IfcCircle_0 IfcCircle      LayerAssignment [0:1]      StyledByItem [0:1] 1. Position [1:1] 2. Radius [1:1] IfcGridAxis_0:AxisCurve1->IfcCircle_0:IfcCircle0 IfcBoolean_0 IfcBoolean IfcGridAxis_0:SameSense1->IfcBoolean_0:IfcBoolean0 IfcLabel_1 IfcLabel IfcGridAxis_1:AxisTag1->IfcLabel_1:IfcLabel0 IfcIndexedPolyCurve_1 IfcIndexedPolyCurve      LayerAssignment [0:1]      StyledByItem [0:1] 1. Points [1:1] 2. Segments [1:?] 3. SelfIntersect [1:1] IfcGridAxis_1:AxisCurve1->IfcIndexedPolyCurve_1:IfcIndexedPolyCurve0 IfcCircle_1 IfcCircle      LayerAssignment [0:1]      StyledByItem [0:1] 1. Position [1:1] 2. Radius [1:1] IfcGridAxis_1:AxisCurve1->IfcCircle_1:IfcCircle0 IfcBoolean_1 IfcBoolean IfcGridAxis_1:SameSense1->IfcBoolean_1:IfcBoolean0
Figure 4.3.1.2.A

General Usage

ApplicableEntity
IfcGrid
Table 4.3.1.2.B

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