Answer:
Cross-section deformations can be activated or deactivated in the parameters of members and sets of members (see Image 01). The cross-section deformation is calculated according to EN 1993‑1‑1 as follows:
$\frac{\displaystyle1}{\displaystyle{\mathrm C}_{\vartheta,\mathrm k}}=\;\frac{\displaystyle1}{\displaystyle{\mathrm C}_{\mathrm{ϑR},\mathrm k}}\;+\;\frac{\displaystyle1}{\displaystyle{\mathrm C}_{\mathrm{ϑC},\mathrm k}}\;+\;\frac{\displaystyle1}{\displaystyle{\mathrm C}_{\mathrm{ϑD},\mathrm k}}$
After the calculation, the value is displayed in the result tables (see Image 02).
The information about calculating the value can be found in the relevant literature or in the manual for the RF‑LTB add-on module.
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