This paper presents an experimental study aimed at collecting information on the response of knee connections to high amplitude fully-reversed rotational deformations, and compares the findings with seismic performance requirements in Eurocode 8. The connections investigated attached twinned outer glulam members to a single glulam member sandwiched between them using steel dowels. Attention is also directed at assessing whether the timber design provisions of Eurocode 5 can be used to estimate moment capacities and rotational stiffness of such knee connections.