Allplan 2020 not export correctly "architectural columns" (with rectangular profiles) to IFC: Allplan not add the important IfcClass of Profile Definitions, for this kind of columns.
In an IFC file that contents IfcColumns and IfcBeams, they can have two ifc classes that defines/explain the kind of profile of those elements:
1- IfcClass for Profile definition: is a must ifcclass. Always it must be inside IFC file. The name of this class is different:
1.1- For rectangle profiles: IFCRECTANGLEPROFILEDEF
1.2- For other profiles (HEB,etc..): IFCARBITRARYCLOSEDPROFILEDEF
2- IfcClass Generic: this generic class, it saves the parameter and the value from allplan. The "Profile name" parameter of allplan and his value, will it saved in the ifcclass "IFCPROPERTYSINGVALUE".
In case of columns with rectangular profile, Allplan not create the ifcClass of profile definition.
I attach 2 images, and a zip (contains IFC and ndw files), to explain it.
Xavier Coll • Architect, Project Manager I+D, BIM Manager, BIM Auditor
EiPM • http://www.eipm.es/en/