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RF-/STEEL BS Add-on Module for RFEM/RSTAB
Design of Steel Members According to British Standard BS 5950-1:2000 or British Annex BS EN 1993-1-1
The RF-/STEEL BS add‑on module designs members and sets of members for the ultimate and the serviceability limit state according to the standards
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BS 5950‑1:2000 (British standard),
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BS EN 1993‑1‑1 (Eurocode 3: British National Annex).
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Features
- Design of tension, compression, bending, shear, and combined internal forces
- Stability analysis of flexural buckling and lateral-torsional buckling
- Automatic determination of critical buckling loads and critical buckling moments for general load applications and support conditions by means of a special FEA program (eigenvalue analysis) integrated in the module
- Optional application of discrete lateral supports to beams
- Automatic cross‑section classification
- Deformation analysis (serviceability)
- Cross‑section optimization
- Wide range of cross-sections available, for example rolled I‑sections, C‑sections, rectangular hollow sections, angles, double angles (arrangement with flange on flange) and T‑sections Welded sections: I‑shaped (symmetrical and asymmetrical about major axis), channel sections (symmetrical about major axis), rectangular hollow sections (symmetrical and asymmetrical about major axis), angles, round pipes and round bars
- Clearly arranged result tables
- Detailed result documentation including references to design equations of the standard used
- Various filter and sorting options of results including result lists by member, cross‑section, x‑location, or by load cases, load and result combinations
- Result table of member slenderness and governing internal forces
- Parts list with weight and solid specifications
- Seamless integration in RFEM/RSTAB
- Metric and imperial units
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Working with RF-/STEEL BS
It is necessary to enter material, load and combination data in RFEM/RSTAB in compliance with the design concept specified by BS 5950 (or Eurocode). The RFEM/RSTAB material library already contains relevant materials for BS 5950.
RFEM/RSTAB automatically creates the corresponding load combinations according to BS 5950 (or Eurocode). However, you can also create all combinations manually in RFEM/RSTAB. The RF-/STEEL BS add-on module requires members and sets of members as well as load cases, load combinations, and result combinations to be designed.
In the next input windows, you can adjust preset definitions of lateral intermediate supports and effective lengths. In the case of continuous members, it is possible to define individual support conditions and eccentricities for each intermediate node of single members. A special FEA tool determines critical loads and moments required for the stability analysis.
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Results
The first result window shows the maximum design ratios including the corresponding design of each designed load case, load combination, or result combination.
The other result windows list all detailed results sorted by specific subject in extendable tree menus. All intermediate results along a member can be displayed at any location. In this way, you can easily retrace how the module has performed the individual designs.
Complete module data is part of the RFEM/RSTAB printout report. You can select the report contents and extent specifically for the individual designs.
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Manual RF-STEEL BS | |
Manual STEEL BS |
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Manual adjustment of the buckling curve according to EN 1993-1-1
The RF-/STEEL EC3 add-on module automatically transfers the buckling line to be used for the flexural buckling analysis for a cross-section from the cross-section properties. In particular for general cross -sections, but also for special cases, the assignment of the buckling line can be adjusted manually in the module input.

SHAPE-THIN | Cold-Formed Sections
SHAPE-THIN determines the effective cross-sections according to EN 1993-1-3 and EN 1993-1-5 for cold-formed sections. You can optionally check the geometric conditions for the applicability of the standard specified in EN 1993‑1‑3, Section 5.2.
The effects of local plate buckling are considered according to the method of reduced widths and the possible buckling of stiffeners (instability) is considered for stiffened sections according to EN 1993-1-3, Section 5.5.
As an option, you can perform an iterative calculation to optimize the effective cross-section.
You can display the effective cross-sections graphically.
Read more about designing cold-formed sections with SHAPE-THIN and RF-/STEEL Cold-Formed Sections in this technical article: Design of a Thin-Walled, Cold-Formed C-Section According to EN 1993-1-3.
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- How can I create a curved or curved section?
- How can I perform the stability analysis for an edgewise supported flat steel, for example 100/5, in RF-/STEEL EC3? Although the cross-section is rotated by 90 ° in RFEM/RSTAB, it is displayed lying flat in RF-/STEEL EC3.
- How are the signs to be interpreted for the release results of the line release and line hinges?
- How is the rotational stiffness of a buckling stiffener determined in FE-BUCKLING?
- How are hot -dip galvanized components considered for fire protection in the Steel EC 3 add -on module?
- In RF-/STEEL EC3, is the "Elastic design (also for cross-section class 1 and 2)" option under "Details → Ultimate Limit State" considered for the stability analysis when activated?
- How can I get the member end forces to design the connections?
- I would like to calculate and design "temporary structures." What do I need for this?
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