DIN 277-2:2005 Areas and volumes of buildings - Part 2: Classification of net ground areas (utilization areas, technical operating areas and circulation areas)
2016DIN 277-1:2016 Areas and volumes of buildings - Part 1: Building construction
2005DIN 277-2:2005 Areas and volumes of buildings - Part 2: Classification of net ground areas (utilization areas, technical operating areas and circulation areas)