Abstract: A removable step for climbing a storage rack which supports pallets in a warehouse or the like. The step comprises a U-shaped rod, the free ends or legs of which are bent at a right angle to the closed portion of the U, which portion provides a step. The legs fit into a first pair of openings in the face of a column comprising part of the rack. The column has many pairs of openings spaced along its length. The legs terminate in hooks which hook over a second pair of openings below said first pair to keep the step from tilting under the load of the climber's foot.