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

LBNL vb: 8/5/ D CAD: Professional Standard

LBNL vb: 8/5/ D CAD: Professional Standard

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

LBNL vb: 8/5/2000 Contact Information

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