What does sustainable construction mean? An overview The influence of the building sector Can we afford sustainability? How can we achieve sustainability in the building sector? Aims of sustainable construction Ecological aims Social aims Economic aims Legal background and codes in Europe Normative background Comments on EN 15804 and EN 15978 Modular life cycle stages Comparability of EPDs for construction products Functional equivalent Scenarios at product or building level Reuse and recycling in module D Aggregation of the information modules Legal framework EU waste framework directive and waste management acts in European countries: product responsibility EU construction products regulation EU building directive and energy saving ordinance Focus increasingly on construction products EU industrial emissions directive Basic principles of sustainability assessment The life cycle concept What is the meaning of the life cycle concept? Life cycle phases of a building Lifecycle planning Building Information Modeling in steel construction Integrated and life cycle oriented planning Life cycle assessment and functional unit Environmental impact categories Lifecycle costing Life cycle costing cost application including cost planning Net present value method Life cycle cost analysis Energy efficiency Environmental product declarations Institute Construction and Environment (IBU) Program Operator for EPDs in Germany The ECO Platform Background databases European open LCA data network ÖKOBAUDAT eLCA, an LCA tool for buildings LCA a European approach Environmental data for steel construction products The recycling potential concept EPD for structural steel EPD for galvanized structural steel EPDs for profiled sheets and sandwich panels KBOB recommendation LCA database from Switzerland KBOB recommendation as a basis for planning tools tools.