This lecture covers the design of folded plate structures in timber, focusing on historical examples, structural principles, origami patterns, fabrication of timber joinery, and full-scale prototype testing. The instructor discusses various forms of folded systems, such as deployable and static structures, and explores different patterns like corrugated surfaces and origami. The lecture also delves into the fabrication of timber joinery, including interlocking folded plate structures and different types of connections. Additionally, it examines the rotational stiffness of joints in folded plate structures and the setup for testing wood joint stiffness. The presentation concludes with a detailed analysis of a full-scale prototype test of a folded plate structure in timber.