Abstract: A shelf system, particularly a pallet shelf system, includes longitudinal girders and/or transverse girders as support elements suspended from and/or fastened to upright posts. The longitudinal girders and/or transverse girders are sectional rails. The shelf system includes auxiliary or additional girders extending parallel to the longitudinal directions of the longitudinal girders and/or transverse girders. The auxiliary or additional girders are hooked and/or otherwise releaseably fashioned to the longitudinal girders and/or transverse girders. Each auxiliary additional girder has at least one sectional portion which laterally projects from the longitudinal girder and/or transverse girder. The at least one laterally projecting portion defines a support bracket for auxiliary support elements and/or guide elements of the shelf system, such as, crossbeams, yokes, shelf boards, separating rods, separating walls or the like.