2020DIN EN 131-4:2020-06 Ladders - Part 4: Single or multiple hinge-joint ladders; German version EN 131-4:2020 / Note: Applies in conjunction with DIN EN 131-1 (2019-11), DIN EN 131-2 (2017-04), DIN EN 131-3 (2018-03).
2020DIN EN 131-4:2020 Ladders - Part 4: Single or multiple hinge-joint ladders