The Forsthaus Energy Center converts waste, regional wood, and natural gas into electricity, steam, and district heating as a highly efficient system. To a significant extent, it uses renewable sources and uses them for the production of local energy: about one-third of the electricity demand in Stadtberner and 12% of the heat demand. The Building is a complex structure done as a monolith concrete structure combined with precast concrete and steel structure. The building’s dimensions are: length / width / height = 300m / 70m / 47m The main tasks were: • Detailed design of the concrete structure • Check structural analysis and calculations GBA is more than 20.000 m2