The TU Darmstadt is planning the rehabilitation section 2. (Towers A, B, C, and lecture hall and library) the general renovation of the building of the Department of Chemistry on campus Lichtwiese. The complex chemistry results from the years 1970-1973. He has more than 15 000 m² of floor space one of the largest contiguous building complexes of the Technical University of Darmstadt. It concerns with the buildings to time typical system structures of several 5-9 storey components (including basement) of a building grid of 7.20 / 8.40 m and a connecting building with 3 classrooms and a library. The rehabilitation of the first, already completed renovation section comprised the towers D, E, F. The subsequent 2nd rehabilitation section includes the towers A, B, C with an area of approximately 7 700 m2 of, as well as lecture halls and the library. The action takes place during normal operations. The following rehabilitation measures are provided: - Disassembly Building equipment; - Coring up to the concrete structure; - Dismantling the facade and escape balconies; - Concrete restoration; - Rebuilding facade and escape balconies; - Reconstruction Interior improvements; - New tech. Infrastructure / facades. The engineering services - Technical equipment acc. Part 4, Section 2 HOAI include the following services: Work phases 5-9 gem. HOAI for the investment groups; 4. power installations; 5. Telecommunications and Information Technology Equipment (except media technology); 6. conveyors. In addition, a partial review of the work phases 3 & 4 for the said investment groups. The authority reserves a gradual commissioning of the power phases.