Abstract: A protection device (1) or protecting a rack system against impact, comprising an outer shell (2) which is configured to be fitted on an upright column of a rack system, and an inner element (3) which is provided in the outer shell (2) and is made of a flexible material and which, in use, is arranged against or adjacent to a part of the column, in which the inner element (3) is hingeably connected to the inner periphery of the outer shell (2) by its longitudinal ends (6), so that the inner element (3) bends in the direction of the outer shell (2) upon impact so that this outer shell (2) is clamped more securely to the column onto which this outer shell (2) is fitted.

Abstract: A fence (1) has at least two hollow fence posts (2), between which at least two crossbeams (3) extend, where each crossbeam (3) fits into an opening (4) provided in the fence post (2), a plate-shaped blocking element (5) extending into the cavity of the fence post (2) which is provided to block the crossbeams (3) against displacement, where the crossbeam (3) is provided in its external circumference with at least one recess (6) which lies within the hollow inner area of the fence post (2) and wherein the plate-shaped blocking element (5) is movable between a first position and a second position in which the crossbeam (3) is blocked in place.