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Application of IFC Product Data Model in Computer-Integrated Building Prefabrication

Computer-integrated prefabrication (CIP) of wall elements for individually planned houses improves the quality, while reducing the time consumption and costs of architecture, engineering, and construction. It will, however, only be successful, if the information exchange between planning (architect) and manufacturing (machine) can be automated in an effective and efficient manner. A continuous information flow requires a neutral data model. The most notable and widely accepted product data model for buildings is the IFC model which enables applications to efficiently share and exchange project information. This paper will present an approach developed to applying the IFC product data model in computer-integrated prefabrication. Entire information flow from the planning stage to the computer-integrated manufacturing process will be described. The mechanisms, including all steps necessary to prepare the building model for prefabrication with floor-to-ceiling AAC (Autoclaved Aerated Concrete) wall elements, will be outlined. Finally, the performance and validation of the mechanisms developed will be reported.