1. Process of the analogue Construction Element Specification - today CE specification CE specification CE specification CE specification CE specification Construction element specification Call for tender Construction element specification As built Construction element specification Conceptual design Today consultants (specifiers) for the Call for Tender primarily write the specifications for the Tender in a Word-paradigm or in a database and send to other parties in pdf. There is no direct or only an analogue link to the building models or other tools or i.e. the Tender list. There is normally no possibility for reuse of data by other participating parties. Few consultants have also tried to use the specification tool in the conceptual design phase. Building Model Building Model Tender list %QQA02 Double.window 240 units…. %QQA04 Single window 90 units …... %QQC06 Firedoor 105 units….. Tender list %QQA02 Double.window 240 units…. %QQA04 Single window 90 units …... %QQC06 Firedoor 105 units…..

2. Required property data Required property data Construction Element Specifications in relation to BIM The big challenge with Building Information Modelling (BIM) is to support the cooperation of the parties and to reuse and use of data created by the previous link in all building phases – that is in the total life cycle of the building work. This challenge is only solved if all parties have acces to the tool or it’s data at a given time in the process. The possibility to share specification models and their data in the same way as the contruction models and other models. This means that property data in one tool can be taken out and reused in other tools and listed as information in documents. This creates new requirements for the specification tool regarding structure, function and form. Building model Product model Production model Production model Tender list %QQA02 Double window 240 units…..%QQA04 Single window 90 units ….. %QQC06 Firedoor 105 units….. Tender list %QQA02 Double window 240 units…..%QQA04 Single window 90 units ….. %QQC06 Firedoor 105 units….. Operation model Operation model Spec. model Calc. model

3. CE-properties in the Building model + Specification model Building model Building model Spec. model Geometric data - Form: - Lenghth:8500 mm - Hight: 2500 mm - Thinkness:120 mm - Area:20,50 m2 Administrative data - CCS prod.ID:#AD - CCS type-ID:%AD(AAEU:12) - Type:TG12 gypsum wall - Measure rule: CCS M_ULM11 - IfcObject: IfcWall - Work sect.:B1.290 Framework construction Performance data - Fire rating: EI 120 A2-s1,d0 - Sound rating: 44 dB - Load: 0 kN Product data - Layer: 2x2 - Edge:Cutted - Quality level: Q3 Administrative data - CCS prod.ID:#AD - CCS type-ID: %AD(AAEU:12) - Type: TG12 gypsum board - IfcObject: IfcWall Building model-CE Specifications-CE Example: Wall Gypsum board CCS-server Base of Produc- tion Base of Produc- tion Construction element specification Construction element specification Tender list Tender list Energy simulation Quantity list Quantity list Properties References Metadata Standard CE-specifications Properties References Metadata %AD(AAEU:12)

4. The Digital Specification Tool 4 Digital spec. tool CCS-server Extract of property data Extract of references Extract of classification codes and metadata During all phases of the construction process Construction entities Spaces Construction elements

5. The digital BIM-specification for Construction Elements Dig.spec.tool CCS-server Extracts of property data Extracts of references Extracts of classification codes and metadata Construction element spec. During all phases of the construction process Purpose: Specification Functional requirements Purpose: Specification Tender Purpose: Product specification Purpose: As built-specification Maintenance data specification Purpose: Specification Conceptual design

6. 4 questions for short comments 1.How do you create interoperability between the Building model, the Specification model and the Tender list? 2.Do your specification use written descriptions or descriptive property data or both? 3.Do you have user conflicts between building modellers and specifiers, e.g. about property data? 4.Do you have a tolerance management tool? 6