Steel Design for RFEM 6 / RSTAB 9

Product Description

  • Steel Structures

Strength and Stability

Powerful, Easy to Use, Easy to Learn...

"We adopted Dlubal in our work and haven't looked back. Powerful, easy to use, easy to learn, with mercifully simple output (once set up)."

Most Suitable Software for Structural Analyses According to Eurocodes

“We decided to work with RFEM by Dlubal Software for the calculation of our three-dimensional steel structures after the analysis of different offers on the market. It is the software which seems to be the most suitable for analyses according to Eurocode standards. With its clear and intuitive interface, the data and the results can be entered visibly and editably in a smooth and efficient way which minimizes the effect of a "black box".

The technical support is remarkably patient, competent and responds quickly which confirmed our decision in favor of RFEM. The tutorials, the blog and the detailed user manuals allow a self-study and a comprehensive initial training and then a continuous learning of new functions. A further positive aspect is the modular structure which makes it possible to enlarge the offer based on the same main program without important learning phase. Even if we decide tomorrow to focus more in timber, aluminum or glass structures, the calculation will not be a blocking element for us.”

The Steel Design add-on has a number of interesting features. For example, it allows you to perform cross-section resistance design and stability analysis of steel member structures in the ultimate limit state. The input and result evaluation are completely integrated in the user interface of the structural FEA software RFEM and the frame & truss analysis software RSTAB.



  • A wide range of available sections, such as rolled I-sections; channel sections; T-sections; angles; rectangular and circular hollow sections; round bars; symmetrical and asymmetrical, parametric I-, T-, and angle sections; built-up cross-sections (suitability for design depends on the selected standard)
  • Design of general RSECTION cross-sections (depending on the design formats available in the respective standard), for example, equivalent stress design
  • Design of tapered members (design method depending on the standard)
  • Adjustment of the essential design factors and standard parameters is possible
  • Flexibility due to detailed setting options for basis and extent of calculations
  • Fast and clear results output for an immediate overview of the distribution of results after the design
  • Detailed output of design results and essential formulas (comprehensible and verifiable result path)
  • Numerical results clearly arranged in tables and graphical display of the results in the model
  • Integration of the output into the RFEM/RSTAB printout report

Cross-Section Resistance

  • Design of tension, compression, bending, shear, torsion, and combined internal forces
  • Tension design with consideration of a reduced section area (for example, hole weakening)
  • Automatic classification of cross-sections to check local buckling
  • Internal forces from the calculation with Torsional Warping (7 DOF) are taken into account by means of the equivalent stress check (currently not for the design standards AISC 360‑16 and GB 50017).
  • Design of cross-sections of Class 4 with effective cross-section properties according to EN 1993‑1‑5 as well as cold-formed sections according to EN 1993-1-3 (licenses for RSECTION and Effective Sections are required for the RSECTION cross-sections)
  • Shear buckling check according to EN 1993‑1‑5 with consideration of transverse stiffeners
  • Design of stainless steel components according to EN 1993‑1‑4

Stability Analysis

  • Stability analyses for flexural buckling, torsional buckling, and flexural-torsional buckling under compression
  • Graphical input and check of the defined nodal supports and effective lengths for a stability analysis
  • Lateral-torsional buckling analysis of the structural components subjected to moment loading
    • Depending on the standard, a choice between user-defined input of Mcr, analytical method from the standard, and use of internal eigenvalue solver
    • Consideration of a shear panel and a rotational restraint when using the eigenvalue solver
    • Graphical display of a mode shape if the eigenvalue solver was used
  • Stability analysis of structural components with the combined compression and bending stress, depending on the design standard
  • Comprehensible calculation of all necessary coefficients, such as the factors for considering moment distribution or interaction factors
  • Alternative consideration of all effects for the stability analysis when determining internal forces in RFEM/RSTAB (second-order analysis, imperfections, stiffness reduction, possibly in combination with the Torsional Warping (7 DOF) add-on)


You enter the structural system and calculate the internal forces in the programs RFEM and RSTAB. You have full access to the extensive material and cross-section libraries. Did you know? You can also use theRSECTION program to create general cross-sections.

You find Steel Design fully integrated in the main programs. They automatically take into account the structure and the available calculation results. You can assign further entries for the aluminum design, such as effective lengths, cross-section reductions, or design parameters, to the objects to be designed. At many places of the program, you can easily select the elements graphically using the [Select] function.



Was your design successful? Just sit back and relax. The program gives you the performed design checks in tables. All result details are displayed for you and you can easily follow them using the clearly arranged design formulas.

The design checks are carried out at all governing locations of the members. A graphical display is provided as a result diagram. Furthermore, you have an access to detailed graphics, such as the stress distribution on a cross-section or the governing mode shape, available in the result output.

All input and result data are part of the RFEM/RSTAB printout report. You can select the report contents and extent specifically for the individual design checks.



  • Full integration in RFEM/RSTAB
  • Easy entering cross-section and stability design checks of all members in the model
  • Consideration of internal forces from the calculation with Torsional Warping (7 DOF)
  • Stress analysis and stability analysis possible for any cross-section and structure (with RSECTION and warping torsion, if necessary)
  • Module-internal eigenvalue solver for lateral-torsional buckling analysis (determination of Mcr) with graphic representation of mode shapes
  • Detailed documentation of the performed design checks with the output of design formulas
  • Integrated material and cross-section library

Manual of Steel Design for RFEM 6


Customer Projects

Customer Projects Designed with Dlubal Products

Fascinating customer projects designed with the Dlubal structural analysis software.


2,650.00 EUR

The prices apply to the use of the software in all countries.

New Features in Steel Joints Add-On

New Features in Steel Joints Add-On

Webinar 06/29/2023 2:00 PM - 3:00 PM CEST

3D Model of the Vocational School in RFEM (© Eggers Tragwerksplanung GmbH)

Special Solutions

First, the two-part Optimization & Costs / CO2 Emission Estimation add-on finds suitable parameters for parameterized models and blocks via the artificial intelligence (AI) technique of particle swarm optimization (PSO) for compliance with common optimization criteria. Second, this add-on estimates the model costs or CO2 emissions by specifying unit costs or emissions per material definition for the structural model.

Price of First License
1,650.00 EUR
Cross-Laminated Timber (CLT) Building


The Multilayer Surfaces add-on allows you to define multilayer surface structures. The calculation can be carried out with or without the shear coupling.

Price of First License
1,250.00 EUR
Pushover Analysis

Dynamic Analysis

Earthquakes may have a significant impact on the deformation behavior of buildings. A pushover analysis allows you to analyze the deformation behavior of buildings and compare them with seismic actions. Using the Pushover add-on, you can analyze the seismic actions on a particular building and thus assess whether the building can withstand the earthquake.

Price of First License
1,450.00 EUR