Margot Gottschling, Constantin Meyer
1 Basics and task: As part of the redesign of Alfter's town center, the construction of the new culture and sports hall is an essential component of the Integrated Urban Development Concept. (ISEK) The cultural and sports hall acts as a public catalyst for the center of Alfter, offers a wide range of uses for citizens, and also takes into account the further development of the school campus. The demand for extracurricular use exceeded the existing capacity of the gymnasium from the 1960s that had previously been used for this purpose. This hall was contaminated, too small, and could not be renovated from a structural and economic point of view, so it had to be replaced, making it sensible to build a new multi-purpose hall. As part of a multiple commission in 2019, the urban development and construction concept of the Cologne-based architectural firm Königs Architekten was selected and commissioned with the planning services. 2 Description of the design concept To emphasize the inviting character of the building, the entrance level is glazed around the entire perimeter and offers views of the foyer and spectator area from the outside. However, the lowering of the playing field and event level protects it from direct view and ensures that the hall height does not result in an urbanistically inappropriate towering volume. The cantilevered roof edges offer protection and create a sense of lightness in the overall appearance. Despite its relatively large volume, the hall remains well integrated into the silhouette of its surroundings. The design aims to make the functions visible and the construction and materials easy to read. The use of the roof in particular is innovative: the outdoor playground has been moved to the roof of the cultural and sports hall, supplemented by a calisthenics park as an individual fitness facility. The roof level is freely accessible and can be used independently of the hall. 3 Sustainability The hall consists of an innovative wooden structure in which beech wood trusses transfer the weight of the roof structure to external V-supports, also made of beech wood. The use of wooden structures of this size in sports and assembly venues is becoming increasingly important as environmental awareness grows and construction technology advances. Large parts of the roof area are intensively and extensively greened with raised beds, which contributes to rainwater buffering. The roof overhang serves to protect the load-bearing beech wood in the outdoor area. At the same time, it provides shade for the vertical glazing, which reduces heat energy radiation. The facade and the cooling of the interior can be optimized accordingly. The heat energy required by the heating system is supported by a heat exchanger, which is fed by a brine/water heat pump.
Königs Architekten PartGmbB
