Section Preview
Normalized geometry with external width and height dimensions
Overall Width
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Overall Height
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Eq. Thickness
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Open Chains
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Outer loops are shown in blue-gray, holes in red, and open chains in orange. Dimension strings are rendered outside the profile for cleaner presentation.
SAP2000-style Results
Engineering fields, structured report output, and access-status tracking
Area
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Ix
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Iy
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Access Status
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Primary Properties
Secondary Properties
Sign in and upload a DXF.
Cold-Formed Steel Check
EN 1993-1-3 with EN 1993-1-5 effective-width screening for irregular thin-walled sections
PENDING
Project & Reference
Material & Design Factors
Design Actions
Signed SAP actions · N positive = compression
Manual entry is active.
Member Stability
Enter only the values required by the selected restraint condition.
Options
Use verified critical values when a stability mode is not positively restrained.
Automatic Plate Decomposition
Detected flat plate regions from the uploaded DXF
Detected t
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Plates
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Flat Area Identified
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Governing rho
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Detected flat plate regions are highlighted on the section. Review the plate list before final design.
| Use | Plate | b flat [mm] | t layer [mm] | Layers | Type | psi | k sigma | lambda p | rho | b eff [mm] | Hint / stress |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Solve a DXF first. | |||||||||||
Design Summary
Effective-width screening, member stability and conservative interaction summary
A eff [mm2]
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W eff 2 [mm3]
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W eff 3 [mm3]
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chi d
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| Check | Demand | Resistance | Utilization | Result |
|---|---|---|---|---|
| Run the EN 1993 check. | ||||
Local plate reduction follows EN 1993-1-5 effective-width slenderness expressions. Flexural member buckling uses EN 1993-1-1 reduction-factor equations. For proprietary open profiles, torsional/torsional-flexural buckling and M3 lateral-torsional buckling require validated critical loads/moments or confirmed restraint. When rho < 1, W_eff remains a screening approximation rather than a full exact effective-section reconstruction. Trace torsion |T Ed| <= 0.0001 kN.m is treated as negligible/non-governing by a tool-level screening convention (not an EN 1993 code limit).