At ZELUBA, the Fraunhofer WKI focuses on the research and development of lightweight hybrid materials, components and constructions as well as their fire and environmental properties. Correspondent to the research at the ZELUBA, the focus during the planning phase was directed at a modular construction method and the utilisation of renewable raw resources in combination with conventional materials. The high, single-storey test field hall with an earthquake test stand that is unique in Europe and the three-storey laboratory building with offices form two building volumes, slightly offset and rotated relative to each other. They are connected by the centrally located, spacious foyer, which gives access to all research and office areas. The modularly designed, rear-ventilated wooden facade in panel construction creates a representative appearance with natural and pre-grayed larch wood. A coordinated fire protection concept enables the use of flammable building materials, load-bearing wooden structures are completely visible. The reinforced concrete foyer between the test hall and the office block acts as a fire wall. In accordance with the high technical requirements [crane runway, vibration decoupling, fire laboratory], constructive details and connections of the various components were developed in an interdisciplinary manner and implemented directly in construction practice. This already points to the future application-oriented research on sustainability of holistic building systems and integrated solutions – to the joint competence center of the Fraunhofer Institute for Wood Research [Wilhelm-Klauditz-Institut, WKI] and the Technical University of Braunschweig.