You can rely on these add-on modules, so even if the ground trembles, nothing collapses.
Use the RF-/DYNAM Pro - Natural Vibrations add-on module for RFEM 5 / RSTAB 8 to determine natural frequencies and mode shapes.
The RF-/DYNAM Pro - Equivalent Loads module extension for RFEM 5 / RSTAB 8 generates equivalent seismic loads according to the multimodal response spectrum analysis. Among others, the German standards DIN 4149‑1:1981‑04 and DIN 4149‑1:2005‑04 are implemented.
RF-/DYNAM Pro - Natural Vibrations Add-on Module for RFEM 5/RSTAB 8 RF-/DYNAM Pro - Equivalent Loads Add-on Module for RFEM 5/RSTAB 8