Buckling curve selection for HSS welded I-section members

High strength steels (HSS) are becoming more common in engineering practice due to their improved qualities. They are standardized by the specific parts of product standard EN10025 and soon they will be also codified in the execution standard EN1090. Regarding design using HSS, EN 1993−1−1 gives stability design rules for columns, beams and beam–columns up to S460, whereas EN 1993−1−12 gives additional guidance for S500 up to S700 (based mainly on numerical work available at the time). Existing studies on flexural buckling of welded H, I and box columns in steel grades S460 to S960, even though limited, show that improved curves can be used for members in high strength steel (HSS).