Firefighting purposes – Escape ladder installations – Part 2: Rescue ways on flat and inclined roofs
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 05/01/2007
Firefighting and fire protection – Escape ladder installations – Part 2: Rescue ways on flat and inclined roofs
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 04/01/2017
