Firefighting and fire protection – Escape ladder installations – Part 1: Escape ladder with falling protection, holding device, platform
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 04/01/2017

Firefighting purposes – Escape ladder installations – Part 1: Escape ladder with and without falling protection, holding device, platform
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 01/01/2004