#### Further Information

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• ### When running PLATE‑BUCKLING as a stand‑alone program or as an add‑on module within RFEM/RSTAB, the "from RFEM" or "from RSTAB" button is grayed out.

If the PLATE‑BUCKLING add-on module is not opened as a stand-alone version, but via RFEM or RSTAB, it is possible to import the panels (c/t parts of a member cross-section) and the respective load cases of the RFEM or RSTAB model to PLATE‑BUCKLING (see the figure).

If there are no valid cross-sections of PLATE‑BUCKLING found in the model file of RFEM/RSTAB, the option for importing the buckling panels remains inactive.
• ### When opening a file of the RF‑/PLATE‑BUCKLING add-on module, the input data are not transferred and the default values are preset. Why?

The RF‑/PLATE‑BUCKLING add-on module is not downward compatible. Please open the file with the same program version you have created the file with, or with a newer version. The previous versions can be downloaded under the link below this FAQ.
• ### In PLATE‑BUCKLING, the reduction factor due to column buckling χc is calculated using the modified slenderness of the sheet metal ${\overline{\mathrm\lambda}}_{\mathrm p}$. Why is it not calculated using the slenderness of the equivalent compression member ${\overline{\mathrm\lambda}}_{\mathrm c}$ ?

RF-PLATE-BUCKLING performs the plate buckling analysis in compliance with Chapter 10 "Reduced Stress Method" of EN 1993‑1‑5. According to EN 1993‑1‑5, 10 (5) a), it is necessary to determine all reduction factors with the modified slenderness ratio of the sheet metal ${\overline{\mathrm\lambda}}_{\mathrm p}$ according to Equation (10.2).
• ### How can I change the Standard / National Annex set for the design in add-on modules?

You can usually set the standard and the National Annex in the top right corner of an add‑on module (see Figure 01). In most cases, it is also possible to display the factors of the National Annex and edit them, if necessary (see Figure 02).
• ### How can you specify in PLATE-BUCKLING, whether it shall comprise a rigid or non-rigid stiffener (end post) when calculating the reduction factor at shear buckling?

In the Details, the PLATE-BUCKLING provides a choice between a rigid and non-rigid stiffener (end post) to specify the shear buckling reduction factor (see Figure 1).
• ### In PLATE-BUCKLING, is it necessary to run an analysis for individual and partial buckling panels?

According to EN 1993-1-5, clause 10 (3), Note 1, the check in PLATE-BUCKLING is always performed on the total panel, because the possibly existing stiffeners are considered in the FE model.

Thus, the checks for partial buckling panels are not necessary.

If not, contact us via our free e-mail, chat, or forum support, or send us your question via the online form.

#### First Steps

We provide hints and tips to help you get started with the main programs RFEM and RSTAB.

#### Wind Simulation & Wind Load Generation

With the stand-alone program RWIND Simulation, wind flows around simple or complex structures can be simulated by means of a digital wind tunnel.

The generated wind loads acting on these objects can be imported to RFEM or RSTAB.

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