In this thesis the structural feasibility of a high-rise core composed of precast elements is studied. A core composed of precast elements differs from a cast in situ core in having connections between the precast elements. From preceding research (Falger, 2003) the stiffness reduction due to the horizontal joints and the open vertical joints can be estimated. There is however no literature available on the structural behaviour of precast corner connections. Since corner connections determine the degree in which the flange core walls are activated more research is required on the structural behaviour of precast corner connections. Therefore the focus of this thesis is on the influence of precast corner connections on the lateral deflections of a core.