The proposed method focuses on the interaction of global and local buckling. A modified
Ayrton‐Perry type buckling curve is proposed to calculate the ultimate compression
force resistance of centrically compressed cold‐formed C channel. The new buckling
curve incorporates both the effects of global imperfections and shift of the center
of gravity caused by local buckling of slender web plate of the considered sections.
Distortional buckling usually does not play any role for this configuration.
