RF-/STEEL EC3 | Features

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12 December 2016



  • Import of materials, cross-sections, and internal forces from RFEM/RSTAB
  • Steel design of thin‑walled cross‑sections according to EN 1993‑1‑1:2005 and EN 1993‑1‑5:2006
  • Automatic classification of cross-sections according to EN 1993-1-1:2005 + AC:2009, Cl. 5.5.2, and EN 1993-1-5:2006, Cl. 4.4 (cross-section class 4), with optional determination of effective widths according to Annex E for stresses under fy
  • Integration of parameters for the following National Annexes:
    • Deutschland DIN EN 1993-1-1/NA: 2015-08 (Germany)
    • ÖNORM B 1993-1-1: 2007-02 (Austria)
    • NBN EN 1993-1-1/ANB: 2010-12 (Belgium)
    • BDS EN 1993-1-1/NA: 2008 (Bulgaria)
    • DS/EN 1993-1-1 DK NA: 2015 (Denmark)
    • SFS EN 1993-1-1/NA: 2005 (Finland)
    • NF EN 1993-1-1/NA: 2007-05 (France)
    • Griechenland ELOT EN 1993-1-1 (Greece)
    • UNI EN 1993-1-1/NA: 2008 (Italy)
    • LST EN 1993-1-1/NA: 2009-04 (Lithuania)
    • LU EN 1993-1-1: 2005/AN-LU: 2011 (Luxembourg)
    • MS EN 1993-1-1/NA: 2010 (Malaysia)
    • NEN EN 1993-1-1/NA: 2011-12 (Netherlands)
    • Norway NS EN 1993-1-1/NA: 2008-02 (Norway)
    • PN EN 1993-1-1/NA: 2006-06 (Poland)
    • NP EN 1993-1-1/NA: 2010-03 (Portugal)
    • SR EN 1993-1-1/NB: 2008-04 (Romania)
    • SS EN 1993-1-1/NA: 2011-04 (Sweden)
    • SS EN 1993-1-1/NA: 2010 (Singapore)
    • STN EN 1993-1-1/NA: 2007-12 (Slovakia)
    • SIST EN 1993-1-1/A101: 2006-03 (Slovenia)
    • UNE EN 1993-1-1/NA: 2013-02 (Spain)
    • CSN EN 1993-1-1/NA: 2007-05 (Czech Republic)
    • BS EN 1993-1-1/NA: 2008-12 (United Kingdom)
    • CYS EN 1993-1-1/NA: 2009-03 (Cyprus)
In addition to the National Annexes (NA) listed above, you can also define a specific NA, applying user-defined limit values and parameters.
  • Automatic calculation of all required factors for the design value of flexural buckling resistance N b, Rd
  • Automatic determination of the ideal elastic critical moment Mcr for each member or set of members on every x-location according to the Eigenvalue Method or by comparing moment diagrams. You only have to define the lateral intermediate supports.
  • Design of tapered members, unsymmetric sections or sets of members according to the General Method as described in EN 1993-1-1, Cl. 6.3.4
  • In the case of the General Method according to Cl. 6.3.4, optional application of 'European lateral-torsional buckling curve' according to Naumes, Strohmann, Ungermann, Sedlacek (Stahlbau 77 (2008), p. 748‑761)
  • Rotational restraints can be taken into account (trapezoidal sheeting and purlins)
  • Optional consideration of shear panels (for example trapezoidal sheeting and bracing)
  • Module extension RF-/STEEL Warping Torsion (the licence is required) for stability analysis according to the second‑order theory as stress analysis, including consideration of the 7th degree of freedom (warping)
  • Module extension RF-/STEEL Plasticity (the licence is required) for plastic analysis of cross‑sections according to Partial Internal Forces Method (PIFM) and Simplex Method for general cross‑sections (in connection with the RF‑/STEEL Warping Torsion module extension, it is possible to perform the plastic design according to the second‑order analysis)
  • Module extension RF-/STEEL Cold-Formed Sections (license required) for ultimate and serviceability limit state designs for cold-formed steel members according to the EN 1993-1-3 and EN 1993-1-5 standards
  • ULS design: Selection of fundamental or accidental design situations for each load case, load combination, or result combination
  • SLS design: Selection of characteristic, frequent, or quasi-permanent design situations for each load case, load combination, or result combination
  • Tension analysis with definable net cross-section areas for member start and end
  • Weld designs of welded cross-sections
  • Optional calculation of warp spring for nodal support on sets of members
  • Graphic of design ratios on cross-section and in RFEM/RSTAB model
  • Determination of governing internal forces
  • Filter options for graphical results in RFEM/RSTAB
  • Representation of design ratios and cross‑section classes in the rendered view
  • Color scales in result windows
  • Automatic cross-section optimization
  • Transfer of optimized cross-sections to RFEM/RSTAB
  • Parts lists and quantity surveying
  • Direct data export to MS Excel
  • Verifiable printout report
  • Possibility to include the temperature curve in the report

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  • Updated 16 October 2020
RFEM Steel and Aluminium Structures

Add-on Module

Design of steel members according to Eurocode 3

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