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Torsional behaviour of thin‐walled members with regular perforation systems

Thin‐walled cold‐formed (TWCF) steel members that are frequently used in steel storage rack systems generally present a monosymmetric cross‐section. The adopted design approaches derive strictly from those developed for the more traditional bisymmetric solid web members, despite i) the presence in rack components of the eccentricity between the shear center and the cross‐section centroid and ii) the regular perforation systems.