Glossary Term

In structural engineering, an action describes a force or deformation acting on a structure.

Action Types

Actions are divided into permanent and variable actions. Permanent actions include self-weight, floor structure, roof structure, and others. Wind, snow and imposed loads represent variable actions. For example, wind loads usually have a favourable effect on a supporting structure, since they are generally lifting loads. Therefore, actions are further divided into actions with favourable and unfavourable effects.

Entering in RFEM/RSTAB

In RFEM/RSTAB, actions are assigned to each load case in action categories. In this case, the actions are classified according to the respective standard.


Action Load case Permanent Variable