ifc, what is iai about?
DESCRIPTION
IFC, what is IAI about?. Vision To enable software interoperability in the AEC/FM industry. Mission To provide a universal basis for process improvement and information sharing in the construction and facilities management industries. Deliverable s - PowerPoint PPT PresentationTRANSCRIPT
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IFC, what is IAI about?
• Vision– To enable software interoperability in the
AEC/FM industry.• Mission
– To provide a universal basis for process improvement and information sharing in the construction and facilities management industries.
• Deliverables– The key deliverable of the IAI is the IFC Object
Model. The term ‘model’ in this case means that it provides a formal specification of requirements which can then be used by software authors to create the IFC compliant software applications.
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IFC, what is IAI about ?
From
Details
To• Vision
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IFC, how is IFC structured?
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IFC, how is IFC developed?
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IFC, how is IFC developed?
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IFC, how is IFC developed?
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IFC, what can IFC do?
Shape (explicit)
Shape (extrusions)beams, columns, pipes, ducts, conduit, walls, etc.
Shape (topology)line representations for pipe, duct, structural, etc.
Building Elementswall, door, window, roof, stairs, etc.
Relations Between Elementsholes, chases, voids, zones
Jeff Wix, IFC2x Foundation for AEC/FMJeff Wix, IFC2x Foundation for AEC/FM
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IFC, what can IFC do?
Space and Space Structurespace, building storey, building part, building, site
Compartmentationfire, workstation
Grids
Furnitureinc. system furniture
Equipmentchillers, fans, pumps, loose equipment, etc.
Jeff Wix, IFC2x Foundation for AEC/FMJeff Wix, IFC2x Foundation for AEC/FM
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IFC, what can IFC do?30
NameTitle
NameTitle
NameTitle
NameTitle
NameTitle
NameTitle
NameTitle
NameTitle
NameTitle
Actorspeople, organizations, org. structure, addresses
Costingobjects, cost planning, estimates, budgets
Abcd afrgf aahds jhiuhg reeiuhHfije ewku ijijij jhdfhb
Work Plans and Schedulesinc. nested schedules, resource allocation
O/Nr A1263
2xAbcd £ 263xafrgf £ 421xaahds £6854xjhiu £421
Orderswork orders, change orders, purchase orders
Jeff Wix, IFC2x Foundation for AEC/FMJeff Wix, IFC2x Foundation for AEC/FM
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IFC, what can IFC do?
O/Nr A1263
2xAbcd £ 263xafrgf £ 421xaahds £6854xjhiu £421Associated Documents
ClassificationOCCS
Uniclass
External Data2xAbcd £ 263xafrgf £ 421xaahds £6854xjhiu £421
Move Management
Asset IdentificationAsset Identification, Maintenance History,Inventories
Air Handling Unit
Boiler
Pump Set[Physical
Association]
PreheaterValves
Luminaires[Spatial Association]
Jeff Wix, IFC2x Foundation for AEC/FMJeff Wix, IFC2x Foundation for AEC/FM
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IFC, who are participating?
• Global• AEC/FM professionals• Software companies• Research Institutes• Governmental supported development
programs• List: Graphisoft, Autodesk, Nemetschek,
Microsoft, HOK, Kajima, London Underground, LBNL, Stanford ... 600 members
• Vera, IT och Fastighed, Corenet, Construction Research Center,,,
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IFC, how are they implemented?
IFC Express definition from IAI
DevelopToolkit
ProgramInputToolkit
Map-ping
OutputToolkit
Map-ping
Data i IFC format
IFC
ProgramInputToolkit
OutputToolkit
IFC IFC
ProgramIFC IFC
IFC
Express definition
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IFC, how are they implemented?
ProgramInputToolkit
Map-ping
Data i IFC format
IFC
Express definition
Input Toolkit
Early binding
Late binding
IFCschema
Map-ping
ProgramMap-ping
Map-ping
IFC schema
OutputToolkit
IFCschema
IFC
IFCIFC
Output Toolkit
IFC schema
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IFC, how are they implemented?
• Views
IFC Schema
View 1
View 2
View 3
IFC R1.5.1 CAD View
IFC R2.0 Client briefing/space planning Architectural designArchitectural design Quantities take off / cost estimation
Architectural design Thermal load calculations / HVAC system design
HVAC design Architectural design
HVAC design Quantities take off / cost estimatingCAD View
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IFC, how are they implemented?
• Or via XML
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IFC based exchange
• IFC
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Course: IT in the Building Process
Product models in practice - based on the IFC pilot project in connection to DR's new headquarter in Ørestad
Jan Karlshøj
IT/CAD Manager
Building and Transportation
M.Sc,PhD
Carl Bro
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Status of an IFC Pilot Project
• Is it possible to achieve the vision of a total interoperable IT-environment in a construction project by using IFC?– No– But what can be achieved, and what are the
alternatives?
BackgroundBackground
I have been active in IAI since 1996, and chaired the I have been active in IAI since 1996, and chaired the International Technical Management Committee International Technical Management Committee between July 1999 and July 2001between July 1999 and July 2001
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What have been tested?
• Building– Part of segment 1 of
the new headquarter for the Danish Broad-casting Cooperation
• 50,000 square meters– Total project
• 100,000 square meters• 350 million US $
– Why this project• Carl Bro participates in the project• Scale matters• Interesting project• Too big ?
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What have been tested?
• Software– IFC 2.0
• ArchiCAD• Visio• Solibri Model
Checker• RIUSKA• Excel• ConViewer
– IFC 1.5.1 • Architectural
Desktop– Tools
• IFC Tree Viewer• IFC to VRML
converter
• Process– Used concurrently with the ordinary process
• Why?– I don’t want to sign legal contracts or
to use IFC in full scale, before we have tested the new process with real data
• Exchange– Only by using IFC
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What have been tested?
• Type of objects:– Wall– Column– Beam– Slab– Window– Door
• Hierarchy– Site– Building– Floor– Space
• Roles• But not
– HVAC, electrical, structural model, requirements, financial information, maintenance etc.
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So, how did the tests go?
• Exchange– Many things worked
• Basic geometry• Types• Some attributes• (Different concepts in
different software product)– Basic limitations of the software
• Only handle bounding box geometry
• Only handle 2½D geometry• Only handle spaces of the
same storey
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So, how did the tests go?
• Limitations in IFC implementations– Support only specific views– Support only IFC import/export for some
components– Do not support features in IFC like openings in
slab (has anybody ever heard about an elevator or a pipe?)
IFC ERROR: Kun åbninger i vægge understøttes på nuværende tidspunkt!IFC ERROR: Kun åbninger i vægge understøttes på nuværende tidspunkt!
IFC ERROR: At the moment only openings in walls are supported!IFC ERROR: At the moment only openings in walls are supported!
IFC ERROR: Kun åbninger i vægge understøttes på nuværende tidspunkt!IFC ERROR: Kun åbninger i vægge understøttes på nuværende tidspunkt!
IFC ERROR: At the moment only openings in walls are supported!IFC ERROR: At the moment only openings in walls are supported!
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So, how did the tests go?
• One common building model?– Walls as one object per layer or one per wall– Some applications prefer ”tall” walls, whereas
others only display walls on the storey they belong to
– Again some applications support voids within a space, others do not
One BuildingOne Building ModelModel
One BuildingOne Building ModelModel
Domain specific Domain specific ModelsModels
Domain specific Domain specific ModelsModels
????
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So, how did the tests go?
• Reaction from software companies– From very good feedback– To very low of feedback
• Looks like the business model is very important in this matter
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So, how did the test go?
• Users– Find the people who understand the use of
models, instead of traditional documents like: drawings and specifications
– Willing to try a new approach– Be ready to be a beta tester
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Participants
• Active participants – Engineering College of Copenhagen– School of Architecture in Aarhus– Byggeinformatik– Carl Bro
• Advisory Group– Danish Broadcasting Cooperation– Cowi– Vilhelm Lauritzen, Architects– PLH, Architect
• Ministry of Education financed the work carried out by the College and Architectural school (50,000 US $)
• Short report will be available in English
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Compared to the “real” project
Status• 2D CAD-drawings
– in production: demand to use 2D-files• Few CAD-models
– 3D geometry for parts of the model• Simulations
– CFD– Bsim– Radiance– GTStrudl
• But at lot of– Documents (Word and Excel)
• Few databases• Start to use a common Document management system
for approved documents• Visualization
– Cave at the construction site?
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Conclusion
• IFC goes beyond what is supported by most applications
• IFC can be used, but for a broader acceptance improvements have to be made– Implementation– Guidelines– Training material– (Model Extensions)
• One unified model can not fulfil all the requirements at the moment
• Data Management and legal aspects have to be investigated further
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Industry Foundation Classes
Students are hereby invited to use the IFC Students are hereby invited to use the IFC specifications in their work, and take part in specifications in their work, and take part in the development, testing and implemen-the development, testing and implemen-tation of IFCtation of IFC..
Thanks for listening !Thanks for listening !
www.iai-forum.dk
www.iai-international.org