This research is to investigate seismic performance of heavy timber frames integrated with buckling restrained braces (BRBs) that act as critical components to resist lateral seismic and wind loads in multi-storey timber buildings. In this hybrid system, BRBs will provide strength, stiffness, ductility and energy dissipation under seismic loading and protect heavy timber framing members such as glulam or LVL members. The research focus consists of two parts. The first part is to understand the behaviour of critical timber-BRB interface connections since these connections should be strong and stiff enough to transfer load between BRBs and heavy timber frame. Some connections will be tested and assessed to identify the most suitable connection type. The second part is to understand the hybrid system performance. Full-scale experimental testing on one-storey glulam frames with BRBs will be conducted with the interface connection type selected according to the outcome of the connection research. The experimental results will be used to calibrate numerical models of the timber-BRB hybrid structures and further conduct parametric studies on the hybrid structures.