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  • Answer

    The Dlubal toolbar is available to the user after carrying out a successful installation of the interface. Use the corresponding components to control the export to RFEM. To do this, simply drag and drop them into the programming interface. An import from RFEM is not possible.


    Communication between Grasshopper and RFEM is enabled by the 'RFEM 5 COM Component'. Once this component with geometric information is activated, the export is started. An opened RFEM file is supposed. It is also recommended to use an empty file because the export procedure overwrites or deletes all information. An update mechanism is currently not implemented.
    The 'RFEM 5 Member Component' allows the user to attach additional information to the geometry (lines, curves). These are taken into account when exporting to RFEM so that the members can be created. The name of material and cross-section has to be entered in a text box (panel). The member rotation can be defined by means of a 'Number Slider' in [rad].
    The 'RFEM 5 Surface Component' is to be used analogously to the 'Member' component. There is supposed a surface when entering the geometry. Using a panel, it is possible to attach the material to them. The thickness of the surface is defined by a number slider in [m]. The stiffness type of the surface can be controlled by means of a 'Value List' with predefined types.


    The Grasshopper file relating to graphic has been saved for download. You only have to define the connecting lines for the final export.

  • Answer

    In principle, the handling of the interface is very simple. After carrying out a successful installation, the Dlubal toolbar is available in Rhino. This includes two icons (Export and Import).



    Using 'Import', it is possible to import data from RFEM to Rhino. It is always imported the whole RFEM model. No update shall be performed in this case. The data is added to the existing structure.
    Click 'Export' to export data from Rhino to RFEM. Normally, the entire structure is exported. If you only want to export parts of the structure, select them before starting the export. It is necessary to start the RFEM and create a file to carry out the export. Please note that the export procedure overwrites all existing data of the opened file. Therefore, it is recommended to open an empty file.

  • Answer

    Please make sure that Rhino (version 6.20 or later) is already being installed. Then carry out the RFEM 5 installation. For this, you need at least version 5.21.02. The plug-ins are automatically saved in one of the following directories and installed during the installation.

    C:\Program Files\Common Files\McNeel\Rhinoceros\6.0\Plug-ins\
    C:\Users\#USER#\AppData\Roaming\McNeel\Rhinoceros\6.0\Plug-ins\

    Figure 02 - Directory of Plug-ins

    After completing the installation, Rhino and Grasshopper can be started. In both programs, the Dlubal-specific toolbars should be available by now. It is possible to attach the Dlubal Toolbar for Rhino to the other toolbars also retroactively (see video).

    Figure 01 - Dlubal Toolbar

    If Rhino has been installed later than RFEM, the interface is not available. In this case, it is recommended to perform a reinstallation of the RFEM.

  • Answer

    • Interface between RFEM/RSTAB and Autodesk Revit

      RFEM and RSTAB communicate with Revit Structure via a direct interface and allow data to be exchanged. Structures modeled with RFEM and RSTAB can be transferred at the push of a button to Revit Structure.

      RFEM/RSTAB is based on an object-oriented building model and Revit on parametric modeling. Thus, the intelligence of the objects is not lost during the data exchange. This means that you get another equivalent object in Revit or RFEM/RSTAB for a column or beam, and not just a collection of lines.
    • Direct RSTAB/RFEM interface to Autodesk AutoCAD

      The members are exported as lines from RFEM/RSTAB. The layers of these lines contain information about the used cross-sections and materials. When exporting a DXF file from RFEM, it is possible to export the numbering, which is controlled by the navigator, in addition to the entire model - including the FE mesh.

      Another option for exporting from RFEM/RSTAB is to transfer results in the form of isolines to a DXF file. Various elements such as isolines, FE mesh, values, etc. can be specifically selected.

    • Direct RSTAB/RFEM interface to Tekla Structures

      With the directly integrated interface, the analytical model of detailed systems can be transferred easily from Tekla Structures to RFEM/RSTAB.

      The Tekla model can be updated quickly using the direct interface by comparing the modified materials, profiles and coordinates when carrying out modifications in structural engineering. It is also possible to remove construction elements that no longer exist or to add new ones.

    • Interfaces to Rhino & Grasshopper

      Rhino interface: Lines, as well as surfaces including openings, can be transferred to RFEM (export) or imported from RFEM (import). The following line types can be transferred: line, polyline, arc, circle, ellipse, parabola and NURBS. In addition, it is possible to exchange these surface types: plane, rotated surface, and NURBS.

      Grasshopper Interface: This interface enables activation of the Dlubal-Tab in Grasshopper. This includes three components. The 'Surfaces' component allows you to add Dlubal-specific surface properties (material, thickness, surface stiffness type) to 2D geometries. Use the 'Member' component to add member-specific properties (material, cross-section, member rotation) to incoming lines or curves. The third component allows for direct export to RFEM.

    • Other exchange formats

      DXF, IFC, STP (e.g. for Intergraph, Advance Steel, SEMA, Cadwork, HSB-Cad, etc.), DSTV (e.g. for Bocad and Frilo), FEM (Glaser) and CFE (Strakon), XLS (Microsoft EXCEL), CSV, ISM.DGN, DGN (Bentley ISM), DAT, SMLX (Advance Steel), ASF (Nemetschek Allplan), ESF

    A detailed overview of the interfaces and the BIM-oriented planning is available on our website Building Information Modeling (BIM).

    Also, there are already numerous webinars about BIM that you can watch on our website as a video.

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First Steps

First steps

We provide hints and tips to help you get started with the main programs RFEM and RSTAB.

Wind Simulation & Wind Load Generation

With the stand-alone program RWIND Simulation, wind flows around simple or complex structures can be simulated by means of a digital wind tunnel.

The generated wind loads acting on these objects can be imported to RFEM or RSTAB.

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