Frequently Asked Questions (FAQ)

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Knowledge Base

Knowledge Base

In the Knowledge Base, you’ll find technical articles and tips & tricks that may help you with your design using Dlubal Software.


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  • Answer

    With the FEA Software RFEM, it is possible to perform the structural analysis and design of containers (shipping containers, office containers, mobile homes, etc.). 

    RFEM offers member, surface and solid elements for detailed modeling. All components can be designed in the corresponding add-on modules.

  • Answer

    RSTAB is a 3D structural frame analysis program where the design of 2D and 3D frameworks is possible. The efficient RSTAB solver allows for linear and nonlinear calculations of internal forces, deformations, and support reactions.

    With RFEM, you extend the member design by plates, shells and solids according to the Finite Element Method. These elements can be combined arbitrarily in a structure. RFEM contains almost all functions from RSTAB; that is why also pure frameworks can be designed with it.

    The user interface and the handling of RSTAB and RFEM are almost identical, but RFEM offers more functions due to the greater scope of the program. The import of structure and load date from RSTAB to RFEM and vice versa is possible as long as the objects are supported by both programs.

    Various add-on modules are available for structural design in RSTAB and RFEM considering both material and standard-specific requirements. Thanks to the modular software concept, it is possible to put together a program package which is adapted to the individual needs. It is possible to upgrade the program at any time.
  • Answer

    If a rolled cross-section with the desired dimensions is not available in the cross-section library, it can be created manually. To do so, select the cross-section you wish to change and click the "Parametric Input" button. A dialog box opens where you can enter the desired data (see Figure 1).
  • Answer

    You find this setting in the "General Data" of the model.
    You can distinguish between the model types "3D", "2D - XY", "2D - XZ" and "2D - XY".

    If you want to enter a floor as a 2D model, and the axial forces within the slab should not be taken into account, set the model type to "2D - XY". If you want to enter a wall, set "2D - XZ".

    Find more information in the RFEM manual, chapter 12.2.1 General - Type of Model.
  • Answer

    Yes, this is done by creating a user-defined cross-section in the cross-section library.
  • How do I change the default settings for the units so they are preset in every new file?



    The default settings are loaded for every new file. If you wish to change them, you have to create a new profile after making the desired changes and set it as "Default" (see figure). If you now start a new file, this setting remains saved. It is also possible to create several profiles, which can subsequently be loaded and managed.

  • Answer

    If you prepare comments, they are saved in the current configuration. You can save this configuration and then import it to another computer.

  • Answer

    Since a different font is required for Russian and Chinese, it is not sufficient for Windows to only change the language in RFEM/RSTAB. In this case, it is necessary to also change the region in Windows. You can easily change it by entering "Region" at the Windows start button (see Figure 1). Set the preferred language in the three tabs (formats, location and administration).

  • Answer

    The anti-virus software on your computer may cause issues. Please exclude the following folders from the virus scanner:

    - Program folder Dlubal for 64-bit applications, such as RSTAB 8 and RFEM 5, if installed as 64-bit application. It has usually the following path:

    C:\Program Files\Dlubal

    - Program folder Dlubal for 32-bit applications, such as RSTAB 7 and RFEM 4. It has usually the following path:

    C:\Program Files (x86)\Dlubal - Program Data Dlubal C:\ProgramData\Dlubal

    - Folder for temporary files:

    Open RSTAB or RFEM and click on the program options (menu command "Options > Program Options") to find the correct path. Select in the "Category" list "Working Directory". The line below the list displays the path.

  • Answer

    The administration interface can be accessed via http://localhost:1947. No further installation i srequired because this service is available after the installation of the dongle driver.

    All Sentinel dongles are displayed in the option Sentinel Keys. By clicking on one of these dongles you get to the address of the server.

    Our licenses are displayed with the vendor number 48521. If you select the option Sessions here, you can see who is using which license.

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