https://community.graphisoft.com/t5/Collaboration-with-other/ArchiCAD-and-ETABS/m-p/238062#M30596 ETABS expects a surface model for finite element analysis; ArchiCAD doesn't support surface models. Fri, 26 Jul 2019 22:05:12 GMT Anonymous 2019-07-26T22:05:12Z https://community.graphisoft.com/t5/Collaboration-with-other/ArchiCAD-and-ETABS/m-p/238060#M30594 <DIV class="actalk-migrated-content"><R>On this page, GraphiSoft mentions ETABS:<BR /> <BR /> <A href="https://www.graphisoft.com/archicad/open_bim/structural_workflows/" target="_blank"><LINK_TEXT text="https://www.graphisoft.com/archicad/ope ... workflows/">https://www.graphisoft.com/archicad/open_bim/structural_workflows/</LINK_TEXT></A><BR /> <BR /> Is there some documentation how you get the ArchiCAD model into ETABS and back?</R></DIV> Fri, 05 Jul 2019 16:01:19 GMT https://community.graphisoft.com/t5/Collaboration-with-other/ArchiCAD-and-ETABS/m-p/238060#M30594 Anonymous 2019-07-05T16:01:19Z https://community.graphisoft.com/t5/Collaboration-with-other/ArchiCAD-and-ETABS/m-p/238061#M30595 IFC<BR /> ETABS supports import and export of IFC 2x3 and IFC 4 formats. <BR /> In version 21 you just open an IFC file with ArchiCAD as you would open any other file type ArchiCAD can open. <BR /> <BR /> <BR /> <BR /> However in the latest version of 22 I don't find any .ifc file types you can open from the Open menu. Fri, 26 Jul 2019 22:00:40 GMT https://community.graphisoft.com/t5/Collaboration-with-other/ArchiCAD-and-ETABS/m-p/238061#M30595 Steve Jepson 2019-07-26T22:00:40Z https://community.graphisoft.com/t5/Collaboration-with-other/ArchiCAD-and-ETABS/m-p/238062#M30596 ETABS expects a surface model for finite element analysis; ArchiCAD doesn't support surface models. Fri, 26 Jul 2019 22:05:12 GMT https://community.graphisoft.com/t5/Collaboration-with-other/ArchiCAD-and-ETABS/m-p/238062#M30596 Anonymous 2019-07-26T22:05:12Z https://community.graphisoft.com/t5/Collaboration-with-other/ArchiCAD-and-ETABS/m-p/238063#M30597 So perhaps the question is how to get a Surface Model from an IFC model using ETABS ? <BR /> <A href="https://www.csiamerica.com/sites/default/files/pdf/S-TN-IFC-001.pdf" target="_blank"><LINK_TEXT text="https://www.csiamerica.com/sites/defaul ... FC-001.pdf">https://www.csiamerica.com/sites/default/files/pdf/S-TN-IFC-001.pdf</LINK_TEXT></A><BR /> <BR /> Probably not easy. But I don't know of any programs that can generate file formats that ETABS can use for structural surface analysis either. Probably have to just use the IFC model as an aid in modeling it all over again with ETABS ?<BR /> <BR /> Did you try classifying the ArchiCAD IFC model as "IfcStructuralSurfaceMember" before saving it as an IFC file? <BR /> Theoretically that should be a part of the IFC file that ETABS can import and use for analysis. Fri, 26 Jul 2019 22:40:11 GMT https://community.graphisoft.com/t5/Collaboration-with-other/ArchiCAD-and-ETABS/m-p/238063#M30597 Steve Jepson 2019-07-26T22:40:11Z