FAQ 003499 EN
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Transformation of the principal axis angle
General thin -walled cross -sections often have asymmetrical geometries. The principal axes of such cross -sections are then not parallel to the horizontally and vertically aligned axes Y and Z. The function "Transform principal axes so that Iu (major axis) is always greater than Iv (minor axis)" allows you to determine the position of the principal axes to match the input.

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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