The existing  bunker in Bremen shall to be converted. As part of these considerations, the client asked CARBOCON for support. The client plans to slightly reduce the height of the used rooms of the bunker system. Thus an increase of the load-bearing capacity is necessary for which the client wants to use carbon reinforced concrete. The client also put down special requirements with regard to the application temperature in the bunker system. Furthermore, a project-related approval must be obtained because a reinforcement grid is to be used that is not yet covered by the general building authority approval.