Step for staircases, platforms, etc. has tread with at least one opening near tread edge that extends to tread edge; rise of step protrudes above surface of tread as tongue-like raised part in region bounding on opening

摘要

The step (1) has a tread (2) that is corrugated and/or perforated at least in some areas and side parts bent down from the tread that can be slightly bent inwards. The tread has at least one opening (4) near the tread edge that extends to the tread edge (3) and the rise of the step protrudes above the surface of the tread as a tongue-like raised part in the region bounding on the opening.