I am a French architect and I am working for an organism that wish to create a IFC national reference model based on the “average” practices of French architects. It’s a model of 80 dwellings.
It is intended to serve as a basis for a set of “realistic” BIM experience and experimentation feedback.
Many actors have worked on this project, and we expect a lot from the conclusions of this project to show the interest of BIM.
The modelling part was made on Revit and Tekla.
Our problem is related to the Export IFC Revit part. And especially around the Walls and IfcWall or IfcWallStandardCase export.
Although the software is IFC certified, objects as simple as walls are not exported as we would like to into IFCWallStandardCase, to be able to show the pset with the width and composition of the layers.
We want to keep these layers and their widths in order to guarantee the interoperability with the thermal software.
Autodesk’s answer is simple: we are certified, we follow the Building Smart scheme, your walls are exported to IfcWall and not IfcWallstandardCase because their geometry is complex.
However, the walls are very simple, and we spent hours doing tests (removing windows, floors, railings, everything barely…). Some simple walls are exported to IfcWall and others more complex ones to IfcWallstandardCase with no apparent reason.the building have 5 similar storeys. On some storey, walls are IfcWall, on others IfcWallStandardCase, no matter the wall joints, width, floor assembly.
We have no more explanation and no similar experience on the web.
How can we say that BIM ensures perfect interoperability when we stop at a major problem at 20% of what we really wanted to do? We have 10 years of experience in this field and we though our model was almost perfect.
Do you have similar experiences?