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Introduction to IFC and IFD

Use of Building Product Models and Reference Data Libraries for project and quality management. CONSTRUCTION PROJECT MANAGEMENT SYSTEMS: THE CHALLENGE OF INTEGRATION S ão Paulo 25-28 March 2003 Lars Bjørkhaug Norwegian Building Research Institute. IFC - International Foundation Classes.

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Introduction to IFC and IFD

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  1. Use of Building Product Models and Reference Data Libraries for project and quality management.CONSTRUCTION PROJECT MANAGEMENT SYSTEMS:THE CHALLENGE OF INTEGRATIONSão Paulo 25-28 March 2003Lars Bjørkhaug Norwegian Building Research Institute

  2. IFC - International Foundation Classes • IFC is developed and maintained by IAI (International Alliance for Interoperability) • IFC is a complete EXPRESS product model of a building project • IAI has 9 chapters each with members from several countries:North American, German Speaking, Nordic, French, Singaporean, Korean, Australasian, Japanese • IFC is supported by most leading building software vendors: • IFD - International Framework for Dictionaries • IFD is developed and maintained by ISO/TC 59/SC 13/WG 6 • IFD is an EXPRESS model standardised in ISO 12006-3 • Several countries has started building dictionaries based on IFD • IFC and IFD is currently being harmonised through the work of XM-7More information at: http://cic.vtt.fi/niai/technical/ifc_3/R3_projects.html BARBi BARBi LexiCon SDC NBR … Introduction to IFC and IFD

  3. NS 3451 ”Building parts” NS 3420 ”Building specifications” ”Building product catalogue” building, outer wall, inner wall, door, outer door, inner door, sliding door, cladding, outer cladding, inner cladding, surface, inner surface, outer surface, inner surface, artefact, interior... BARBi the Norwegian IFD library • BARBi is a conceptual context independent reference library • BARBi describes objects independent of usage and time, regardless of how they are named or classified.

  4. is a type of inner door door is a type of building product fire door is a type of fire escape route is part of escape route door consists_of door leaf consists_of door sill door frame door is part of doorway is a type of opening in wall horizontal light-opening for door relates to with of escape route can be door inner door outer door sliding door consists of sliding door leaf rotating door sliding door frame strongroom door BARBi the Norwegian IFD library • BARBi is object oriented • BARBi describes an concept by relating it to other concepts • Any concept in BARBi exist only once • Concepts can be referred to, though globally unique IDs

  5. A dictionary based mapping does not necessarily refer to the identical concept. dør door door-set dørblad door • An concept can have multiple names on the same language bjelke beam truss balk ligger Functional object a pump as a functional object • A name can refer to multiple concepts pump Physical object a physical pump on a plant to pump Activity or process BARBi the Norwegian IFD library • BARBi is multi lingual according to the rules of IFD • Concepts are classified as objects, activities, properties and units, not as verbs, substantives, adjectives, etc.

  6. What can BARBi do for the building industry? Give precise and exact definitions of objects, properties and relationships. I.e. What do we mean by ”width” and ”height” for a door? • depends on who is using the concept, and in which context it is used. • depends on when, in an object’s lifetime, the concept is used. • depends on which classification we refer to.

  7. What can BARBi do for the building industry? Give precise and exact definitions of objects, properties and relationships. in BARBi you will find: • all known properties for objects with explicit names • several types of relationships between objects, properties, activities, units and references. • references to known standards and classification systems • a global unique ID and a set of language-dependent names and definitions, for every concept in the library

  8. IFC propertyset Information exchange on IFC format IFC propertyset Self defined data • IFC can also exchange self defined data through IFC property-set… IFD reference data • IFC and IFD opens for 100% standardisation of exchanged data IFC and IFD for exchange of data • IFC ensure that data is exchanged as objects and object properties and not as lines and layers… • IFC can only standardise to a level of detail that is internationally agreed about… • The properties within an IFC property-set are not always standardised • IFC properties are not context independent…

  9. Laws and regulations -Building regulations -Building specifications CAD software -Drawings, calculations -Architect, engineer,… VRML -Visualisation, 3D models Knowledge databases -Best practise knowledge -Own practice Simulations -Comfort -Ventilation, heating -Life cycle cost -Light, sound -Insulation -Fire, usage -Environment -Life time predictions Briefing -Functional req. -Estimates -Conditions -Requirements IFC + IFD product model Demolition, refurbishment -Rebuild -Demolition -Restoration Facility management -Letting, sale, operations -Maintenance -Guaranties Specifications -Specification sheets -Classification standards -Estimates, accounting Construction management -Scheduling -Logistics, 4D Procurement -Product databases -Price databases From ad-hock, fragmented information to shared standardised data Illustrations: Norwegian Building Research Institute, Olof Granlund, NBLN University of California, Stanford University

  10. Research centres, authorities and suppliers of best knowledge: • Generic object databases with links to specification sheets and knowledge databases (best solutions) • Predefined objects to drag-and-drop into CAD or specification software, etc. IFC • Automatic control of selected solutions against best practise and regulations. • Automatic control towards company knowledge IFC • Centralised calculations of environmental impact • Calculations of life cycle cost and lifetime prediction • Health and safety evaluation and recommendations IFC Who will be using IFC and IFD?

  11. Product model servers (project hotels, project servers) • Possibility to exchange and update single objects. No longer need to send the whole drawing layer. • History of changes and reason for changes. Possibilities to set access rights for particular actors. • One project can be visualised in multiple ways; as drawings, specifications, calculation, estimates, etc. • Functional demands, technical solutions and product information stored on the same object. IFC + IFD product model • Construction companies, architects and engineers • Extracts of essential information from product models; escape routes, room functions, load bearing walls • Reuse of information already typed • Information to and from building authorities • Materials and product orders • Generation of checklists • Facility management information • Guaranties and maintenance information IFC + IFD product model Who will be using IFC and IFD?

  12. For information about IFC and IAI visit: www.iai-international.org • Documents and technical papers • Calendar, links, International chapters • Demos • For information about IFD and BARBi visit: www.barbi.no • Online version of the Norwegian IFD library • Papers and documentation about the project • Tools and demos Further reading:

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