I am designing an asymmetric cross-section and I got the message: "Non-Designable: ER051 Moment about z-axis on asymmetric cross-section, taper, or set of members". Why?
Answer:
The reason for this warning is that asymmetric cross-sections cannot be designed using the methods mentioned in 6.3.3 of EN 1993‑1‑1 or the General Method according to 6.3.4 of EN 1993‑1‑1.
However, the stability analysis can be performed according to the second-order analysis as a cross-section design. This is possible with the add-on modules FE‑LTB or STEEL Warping Torsion.
Model Used in
Single-Span Beam with Asymmetric Cross-Section
| Number of Nodes | 2 |
| Number of Lines | 1 |
| Number of Members | 1 |
| Number of Load Cases | 1 |
| Total Weight | 0.306 tons |
| Dimensions (Metric) | 5.500 x 0.500 x 0.500 m |
| Dimensions (Imperial) | 18.04 x 1.64 x 1.64 feet |
| Program Version | 5.23.01 |
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