A shelf (1) for mounting on a substantially rectangular load carrier having four identical columns arranged in the corners thereof. On the shelf a holder (3,3; 3″, 3′″) is mounted that can be inserted into complementary slots in the columns of the load carrier, said slots being configured with a carrier face by which the holder is capable of engaging in such a manner that the holder supports on the column. The holders are configured from an elastic material with a shock-absorbing part which is provided with a bend extending in the transverse direction of the shelf, said shock-absorbing part being anchored in the shelf to the effect that forces applied to the holder in a direction extending in the longitudinal direction of the shelf can be absorbed elastically in the bend.