Stress Analysis Software
Structural FEM Analysis and Design
The structural analysis software RFEM 6 is the basis of a modular program family. The main program RFEM is used to define structures, materials, and loads for planar and spatial structural systems consisting of plates, walls, shells, and members. The program also allows you to create combined structures as well as model solid and contact elements.
Structural Frame & Truss Analysis Software
The structural frame and truss analysis software RSTAB 9 has similar functions as the FEA software RFEM. Due to the special attention to beam, frame, or truss structures, it is very easy to use and for many years, it has been the best choice for structural analysis and design of pure structural member models.
Add-ons and Add-on Modules for RFEM and RSTAB
For design of various materials such as reinforced and prestressed concrete, steel, aluminium, timber, and glass, there is a wide range of powerful add-ons and add‑modules.
They allow you to perform nonlinear, stability and dynamic analysis as well as joint design and form‑finding process for cable and membrane structures.
Stress Analysis of Pipelines
The RF‑PIPING Design add-on module for RFEM 5 compares the existing pipe stresses with the allowable stresses according to ASME B31.1, ASME B31.3, and EN 13480‑3.
This is done on the basis of the piping modeling in the RF‑PIPING add-on module for RFEM 5.
Interfaces for Data Exchange
The structural analysis software provided by Dlubal Software can be integrated seamlessly into the Building Information Modeling (BIM) process. The large number of interfaces ensures the data exchange of digital building models with RFEM or RSTAB.
The web service (programmable interface) can be used to read or write data from/to RFEM and RSTAB.
Support and Learning
Customer service is a fundamental pillar of the Dlubal Software company philosophy. We provide any necessary support you need to complete your daily work.
Contact Us
Do you have any questions about our products or which are best suited for your design projects? Contact us via phone, email, or chat or find suggested solutions and useful tips on our FAQ page available 24/7.
Further Information
Online Manual | RFEM 6
Structural Analysis Models to Download
Select numerous structural models to utilize them for training purposes or for your projects.

Classification and Ultimate Limit State Design of SHAPE-THIN Cross-Sections
When designing a steel cross-section according to Eurocode 3, it is important to assign the cross-section to one of the four cross-section classes. Classes 1 and 2 allow for a plastic design; classes 3 and 4 are only for elastic design.

Nonlinear Material Law for Membranes
In RFEM, there is an option to couple surfaces with the stiffness types "Membrane" and "Membrane Orthotropic" with the material models "Isotropic Nonlinear Elastic 2D/3D" and "Isotropic Plastic 2D/3D" (RF-MAT NL add-on module required).
This functionality enables the simulation of the nonlinear strain behavior of, for example, ETFE foils.
- The design ratio of the cross-section check is different for the RF‑/STEEL and RF‑/STEEL EC3 add-on modules. What is the reason?
- How does the "Orthotropic Plastic" material model work in RFEM?
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The limit stress is activated, but my stress ratio is “non-designable” in the Stress-Strain Analysis add-on. What could be the reason?
- Is it possible to calculate the weld stresses between surfaces with RFEM 6?
- Is it possible to display the deformation analysis of a surface (limit 0.5‰)?
- For the settlement calculation in the RF‑SOILIN add-on module, the specific weight gamma and gamma,sat are required for the soil. What do I need the value gamma,sat for, and how is it assumed in the calculation?
- I would like to define a line support with ineffective tension and apply the tension force on this line using a nodal support instead. Why does the line support still receive a tension force?
- Is it possible to consider the reduction of strength in the heat affected zone (HAZ) in the RF‑/ALUMINUM add-on module?
- How do I display some results of all load cases in the printout report, but other results of selected load cases only?
- What is the difference between SHAPE‑THIN 9 and SHAPE‑THIN 8?
Associated Products