Ninth International Conference on THIN-WALLED STRUCTURES, ICTWS2023, Sydney, Australia, Nov 29 – Dec 1, 2023, Sydney, Avustralya, 29 Kasım 2023, ss.1
A comprehensive experimental program was designed to explore the bending behaviour and
capacity of cold-formed steel (CFS) stud walls clad with wood-based boards. The investigation
focused on several key design parameters, such as screw spacing, board material and thickness, stud
and track thicknesses, board configuration (single-sheathed, double-sheathed, and unsheathed), and
the presence or absence of longitudinal seams, noggins, and track sections. The study involved fourpoint bending tests on 15 stud walls, which were sheathed with either Oriented Strand Board (OSB) or
plywood. The results uncovered a surprisingly wide array of failure modes, despite the geometric
simplicity of the system. The most common failure mode was simultaneous crushing of the OSB and
distortional buckling of the studs, with varying degrees of shear interaction. In other cases failure was
attributed to rotational and lateral-distortional deformations of the studs, often accompanied by
longitudinal cracking of the boards.