Lengths in mm, E and fy in MPa. To use a different section database: Load section table (.csv)
Predicts the moment–rotation (M-θ) backbone of steel wide-flange beam-columns from the cross-section, member length, axial load ratio, material properties and boundary conditions, using the nonlinear modelling parameters proposed by Lignos et al. (2019) for ASCE 41. It also provides damage fragility functions. You can save each plot as PNG or SVG and the curve data as CSV.
Developed by Dr Ahmed Elkady, University of Southampton. Email: a.elkady@soton.ac.uk · Homepage
These tools are provided for research and educational purposes only, without warranty of any kind. The predictions are estimates from the cited models and are only as reliable as those models within their validity ranges. Results should be checked independently by a qualified engineer before being used in design or assessment.
© 2026 Ahmed Elkady, University of Southampton. All rights reserved.
