Combination Expression

Glossary Term

On the basis of a combination expression, actions can be combined in a combination, for example, a result combination or a load combination.

The combination expression is based on the selected standard. This standard can be ASCE 7‑16, for example.

To create various design situations, such as the ultimate limit state, serviceability limit state, fire situation or earthquake, different combination expressions are required. The individual combination expressions are based on various probabilities, which are adapted for the respective purpose of the design.

Entering in RFEM and RSTAB

If there is a standard set for the classification of load cases and combinations in General Data of the model and the option for the automatic creation of combinations is also selected, result combinations or load combinations are created on the basis of the combination expressions. If the option for the automatic creation of combinations is disabled, there are no combination expressions set up in the program and you need to create the combinations manually.


Combinatorics Load combination Result combination



RFEM Main Program
RFEM 5.xx

Main Program

Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements

Price of First License
3,540.00 USD
RSTAB Main Program
RSTAB 8.xx

Main Program

The structural engineering software for design of frame, beam and truss structures, performing linear and nonlinear calculations of internal forces, deformations, and support reactions

Price of First License
2,550.00 USD