1. IFC-Based Definition of Geometry for Buildings Dr. Vladimir Bazjanac Lawrence Berkeley National Laboratory Leader, IAI Technical Advisory Group

2. LBNL vb: 8/5/2000 2-D CAD: Professional Standard

3. LBNL vb: 8/5/2000 2-D CAD: Professional Standard

4. LBNL vb: 8/5/2000 Future: 3-D CAD

5. LBNL vb: 8/5/2000 Types of Industry CAD Software

6. LBNL vb: 8/5/2000 CAD-Based Industry Applications Who in the industry needs the acquisition of geometry? Virtually everyone!Who in the industry needs the acquisition of geometry? Virtually everyone! architectsarchitects engineers (structural, mechanical, electrical, civil, fire protection, etc.)engineers (structural, mechanical, electrical, civil, fire protection, etc.) cost estimatorscost estimators contractors and builderscontractors and builders inspectors and code checkersinspectors and code checkers building operators/engineersbuilding operators/engineers facility manageresfacility manageres

7. LBNL vb: 8/5/2000 Geometry Performance Needs DimensionalDimensional Perfect space enclosurePerfect space enclosure

8. LBNL vb: 8/5/2000 Industry Need for Interoperability Future: all data available to everybody at all times

9. LBNL vb: 8/5/2000 The Mechanism of Geometry Exchange EXPRESS Definition Physical File Client/Server SDAI Database Distributed (Interface) Application

10. LBNL vb: 8/5/2000 Application Geometry Import/Export

11. LBNL vb: 8/5/2000 International Alliance for InteroperabilityMission: To define, promote and publish specifications for the Industry Foundation Classes (IFC) as a basis for AEC Project information sharing through the project life cycle, globally, across disciplines and technical applications To define, promote and publish specifications for the Industry Foundation Classes (IFC) as a basis for AEC Project information sharing through the project life cycle, globally, across disciplines and technical applications

12. LBNL vb: 8/5/2000 IFC Object Data Model Architecture Cost Resource Geometry Resource Topology Resource Geometric Model Resource Material Resource Measure Resource Property Resource Actor Resource External Reference Resource Approval Resource DateTime Resource Repres- entation Resource Profile Resource Utility Resource Kernel Product Extension Process Extension Modeling Aid Extension Shared Building Elements Shared Building Services Elements Shared Facilities Elements Shared Management Elements Shared Spatial Elements Architecture Domain HVAC Domain FM Domain Construction Management Domain Resource Layer Core & Extensions Layer Interop Layer Domain Layer

13. LBNL vb: 8/5/2000 The IFC Geometry Model

14. LBNL vb: 8/5/2000 IFC Views of Geometry Bounding boxBounding box Attribute-drivenAttribute-driven SolidsSolids

15. LBNL vb: 8/5/2000 STEP AP225: Types of Building Elements Structure/enclosure elementsStructure/enclosure elements wallswalls beamsbeams columnscolumns slabs, etc.slabs, etc. Building services elementsBuilding services elements Fixture equipment elementsFixture equipment elements doors,doors, windows, etc.windows, etc. SpacesSpaces Simple digital terrain modelSimple digital terrain model planar faces as trianglesplanar faces as triangles

16. LBNL vb: 8/5/2000 *.ifc File

17. LBNL vb: 8/5/2000 Geometry Data Exchange Issues File sizeFile size Interfaces to the IFC object data modelInterfaces to the IFC object data model MiddlewareMiddleware

18. LBNL vb: 8/5/2000 E+ Interoperable Environment

19. LBNL vb: 8/5/2000 Contact Information

20. LBNL vb: 8/5/2000 Thank you! Questions?