Knowledge Base


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  • More than 45,000 users in 95 countries
  • One software package for all application areas
  • Free support provided by experienced engineers
  • Short learning time and intuitive handling
  • Excellent price/performance ratio
  • Flexible modular concept, extensible according to your needs
  • Scalable license system with single and network licenses
  • Proven software used in many well-known projects

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.


Receive information including news, useful tips, scheduled events, special offers, and vouchers on a regular basis.

  1. Load Case 1

    Warping Torsion Analysis According to AISC Design Guide 9

    The design of a torsional loaded beam according to AISC Design Guide 9 will be shown based on a verification example. The design will be performed with the RF-STEEL AISC add-on module and the RF-STEEL Warping Torsion module extension with 7 degrees of freedom.
  2. Figure 01 - Virtual Joists and Virtual Joist Girders in Cross-Section Library

    SJI Virtual Joists Available

    The Steel Joist Institute (SJI) has previously developed Virtual Joist tables to estimate the section properties for Open Web Steel Joists. These Virtual Joist sections are characterized as equivalent wide-flange beams which closely approximate the joist chord area, effective moment of inertia, and weight. Virtual Joists are also available in the RFEM and RSTAB cross‑section database.

  3. RF-/STEEL AISC Mode Shapes

    RF-/STEEL AISC Mode Shapes

    After running an analysis in RF‑/STEEL AISC, the mode shapes for sets of members can be viewed graphically in a separate window. Select the relevant set of members in the result window and click the [Mode Shapes] button.

  4. Figure 01 - Cross-Section

    Design and Stabilization of Beams Susceptible to Lateral-Torsional Buckling According to Eurocode 3 and AISC

    A single‑span beam with lateral and torsional restraint is to be designed according to the recommendations of Eurocode 3 and AISC. If the beam does not reach the required load‑bearing capacity, it must be stabilized.

  5. RF-/STEEL AISC: Notional Loads to Represent Imperfections

    Notional Loads to Represent Imperfections

    In the AISC 360 – 14th Ed. C2.2, the direct analysis method requires the consideration of initial imperfections to be taken into consideration. The important imperfection of recognition is column out-of-plumbness. According to C2.2a, the direct modeling of imperfections is one method to account for the effect of initial imperfections. However, in many situations, the expected displacements may not be known or easily predicted.

  6. AISC: Direct Analysis Method and Stiffness Reduction

    Direct Analysis Method and Stiffness Reduction

    Requirements for the design of structural stability are given in the AISC 360 – 14th Ed. Chapter C. In particular, the direct analysis method provisions, which was previously located in Appendix 7 of the AISC 360 – 13th Ed., are described in detail. This method is considered an alternative to the effective length method which in turn eliminates the need for effective length (K) factors other than 1.0.

  7. Figure 01 - Sign Convention for "Load Application of Positive Transverse Loads"

    Sign Convention for 'Load Application of Positive Transverse Loads'

    We often receive customer questions regarding the display of positive or negative eccentricity of positive transverse loads in RF‑/STEEL EC3 and RF-/STEEL AISC.

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Knowledge Base

In addition to our technical support (e.g. via chat), you’ll find resources on our website that may help you with your design using Dlubal Software.

First Steps

First steps

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

Powerful and Capable Software

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