Karamba3D is not meant to be a substitute for a full blown structural engineering finite element software package. Instead it aims at providing flexibility in testing different structural designs that the more traditional FE-applications lack. We therefore started to implement interfaces to those traditional civil engineering packages.
At the moment Karamba3D supports data exchange with RStab5, RStab6, RStab7, RStab8 and Robot. With GeometryGym it is possible to export Karamba3D model data to IFC.