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AD 425: Full depth stiffeners and lateral torsional buckling

The SCI Advisory Desk sometimes receives questions about the potential to use full depth stiffeners to restrain lateral torsional buckling, suggesting that the stiffeners prevent relative movement of the compression and tension flanges. Whilst this is true, lateral torsional buckling is a displacement and twist of the complete section, which stiffeners alone do nothing to prevent. The American Institute of Steel Construction notes that “transverse stiffeners are simply along for the ride” as the sketch indicates.

Contact: Richard Henderson
Tel: 01344 636525
Email: advisory@steel-sci.com

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