The most critical feature of cold-formed steel (CFS) design in is the calculation of effective cross-section properties to account for local and distortional buckling .

Handled by assigning a "reduced thickness" to stiffeners, such as the small lips on a C-channel.

Specific geometric calculations for the small radii at corners, which significantly impact structural behavior in thin-walled sections.

Reduces the "effective width" of individual flat elements (like the web or flange) of the cross-section.

Rules for using steel sheeting as a structural diaphragm to resist lateral loads.

Because CFS members are thin, they often buckle before reaching their full material yield strength. Eurocode 3 manages this using the . 🛠️ Key Feature: The Effective Width Method

Provisions to account for the increased yield strength that occurs at the corners of a section during the cold-forming process.