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Frequently Asked Questions (FAQ)
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AnswerBoth RFEM and RSTAB are suitable as a solution. Numerous European and international standards as well as various add-on modules are available for both programs, which will facilitate the daily work in steel structures .
Basic programs RFEM or RSTABStructures, materials, and actions are defined in the basic programs RFEM or RSTAB. In addition to creating spatial frame structures, for example, halls, RFEM also provides plates, plate and shell structures, making it a more versatile option. This pays off if it is also to be designed in other disciplines, such as solid construction.
- EN 1993-1-1 (Eurocode 3),
- AISC according to ANSI / AISC 360 (US standard),
- SIA according to SIA 263: 2013 (Swiss standard),
- IS according to IS 800: 2007 (Indian Standard),
- BS according to BS 5950-1: 2000 (British Standard) or BS EN 1993-1-1 (British Annex),
- GB according to GB 50017-2003 (Chinese standard),
- CSA according to CSA S16-09 and CSA S16-14 (Canadian standard),
- AS according to AS 4100-1998 + Annex 1 - 1999 (Australian Standard),
- NTC-DF according to NTC-RCDF (2004) (Mexican standard),
- SP according to SP 16.13330.2011 (Russian standard),
- SANS according to SANS 10162-1: 2011 (South African standard),
- NBR according to ABNT NBR 8800: 2008 (Brazilian standard),
- HK according to the standard for steel structures 2011 (Buildings Department - Hong Kong)
- RF- / STEEL - General Stress Checks
Add-on Modules for Structural Steelwork
Add-on modules supplement the functionality of the basic programs. With RF- / STEEL EC3, for example, you perform the design according to Eurocode 3 for the structure. The add-on module RF-STEEL Warping Torsion supplements this design according to Eurocode 3 with lateral-torsional buckling designs with up to 7 degrees of freedom, if it is not a standard case of EC3.
Other more specialized applications such as the plastic design, the stability analysis according to the eigenvalue method or the generation of geometric equivalent imperfections and pre-deformed equivalent models are available. Single modules such as PLATE-BUCKLING support you in the design of rigid or stiffened plates. With the SHAPE-THIN add-on module, you can create any thin-walled cross-sections. The cross-section properties are determined and stress analyzes or plastic designs can be performed.
Use the RF-JOINTS add-on modules to design hingeable or rigid connections.
The CRANWAY one-way application is available for the design of crane runways.
If earthquake calculations or vibration analyzes are necessary for the building, the RF- / DYNAM Pro add-on modules provide suitable tools for determining natural frequencies and shapes, analysis of forced vibrations, generation of equivalent loads, or for the nonlinear time history analysis.
If you have any questions about the Dlubal software, contact the sales department.
Unfortunately, the output of support forces is not possible. However, you can perform design with RF‑/FE‑LTB: the output of support forces is included there.
AnswerNo, hinges have to be defined separately in the model and cannot be generated automatically by RF-/STEEL EC3.
AnswerConnection moments are not calculated in RF-/STEEL EC3.
According to EN 1993-1-1, it is only possible to increase the material factor based on the applied stresses if stability analyses are not performed with the equivalent member design. Since equivalent member designs are activated in the next tab 'Stability' by default, this check box is greyed out.
After deactivating the equivalent member design, this checkbox is enabled and activated by default.
You have probably not selected the correct National Annex in General Data of the module. For example, if 'CEN' is used, the recommendations of this standard are used and gamma_M1 is set to 1.0.
Please select the correct National Annex (see figure).
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