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2021-02-24

[EN] FAQ 004955 | How can I perform the stability analysis in RF‑/STEEL EC3 for a flat bar supported ...

Question:
How can I perform the stability analysis in RF‑/STEEL EC3 for a flat bar supported on edges, such as 100/5? Although the cross-section is rotated by 90° in RFEM/RSTAB, it is displayed as lying flat in RF‑/STEEL EC3.

Answer:
In RF‑/STEEL EC3, the uniaxial bending stress is always related to the local y‑axis of a member and the local y‑axis of a member is always assumed as the major axis in the case of symmetric cross-sections, therefore it is only possible in such a case to change the cross-section description from "100/5" to "5/100", see the image. Thus, the stability analysis is performed accordingly.