A step or stair step arrangement configured for discretionary placement on a sloped surface , the step or stair step arrangement comprising at least one step or stair step element including a) a step surface configured to be stepped on by at least one foot of a person, b) at least two base elements that are in front in an installed position, protrude downward from the step surface , that are offset from each other in a transversal direction and that have a first vertical extension (h1) measured from the step surface wherein free ends of at least the forward base elements are configured to penetrate the sloped surface at least partially, c) at least one base element that is arranged in a rear in the installed position and protrudes downward from the step surface and that has a second vertical extension (h2) measured from the step on surface , wherein d) the first vertical extension (h1) is greater than the second vertical extension (h2), wherein e) a first forward base element of the forward base elements includes plural first pass through openings respectively arranged at a different level and a second forward base element of the forward base elements includes plural second pass through openings that are respectively arranged at a different level, characterized in that f) at least one rod shaped boundary element is provided for loose insertion into a predetermined first pass through opening of the plural first pass through openings and into a predetermined second pass through opening of the plural second pass through openings so that a penetration of the at least two forward base elements into the sloped surface is limited to an insertion level by the boundary element that is inserted into the predetermined first pass through opening and the predetermined second pass through opening , wherein the insertion level corresponds to a level of the boundary element , wherein g) the rod shaped boundary element respectively protrudes laterally by a distance from the pass through openings . a) a step surface configured to be stepped on by at least one foot of a person, b) at least two base elements that are in front in an installed position, protrude downward from the step surface , that are offset from each other in a transversal direction and that have a first vertical extension (h1) measured from the step surface wherein free ends of at least the forward base elements are configured to penetrate the sloped surface at least partially, c) at least one base element that is arranged in a rear in the installed position and protrudes downward from the step surface and that has a second vertical extension (h2) measured from the step on surface , wherein d) the first vertical extension (h1) is greater than the second vertical extension (h2), wherein e) a first forward base element of the forward base elements includes plural first pass through openings respectively arranged at a different level and a second forward base element of the forward base elements includes plural second pass through openings that are respectively arranged at a different level, characterized in that f) at least one rod shaped boundary element is provided for loose insertion into a predetermined first pass through opening of the plural first pass through openings and into a predetermined second pass through opening of the plural second pass through openings so that a penetration of the at least two forward base elements into the sloped surface is limited to an insertion level by the boundary element that is inserted into the predetermined first pass through opening and the predetermined second pass through opening , wherein the insertion level corresponds to a level of the boundary element , wherein g) the rod shaped boundary element respectively protrudes laterally by a distance from the pass through openings . <EOS>