Behaviour of stud-to-sheathing fastener connections in LSF walls at elevated temperatures

Light-gauge steel framed (LSF) walls used in low- and mid-rise buildings are usually sheathed with gypsum plasterboard to protect the thin-walled studs fire. The structural failures of these fire mostly associated local in-plane shear or pull-through at their stud-to-gypsum sheathing screw fastener connections. reductions mechanical properties cold-formed elevated temperatures significantly reduce strength stiffness provided by stud-to-sheathing connections, which may lead premature failure LSF wall studs. Many detailed studies available on ambient temperature response however, both out-of-plane responses connections limited. Therefore this study tests were conducted determine load–displacement behaviour, capacity reduction factors Suitable models characteristic curves also proposed predict temperatures. results from can be advanced numerical analyses optimize design load-bearing under conditions.