Shelf system, particularly pallet shelf system

A shelf system comprising upright posts and longitudinal girders and transverse girders fastened between the upright posts, wherein at least the longitudinal girders are support elements and are suspended from the upright posts, and wherein at least the longitudinal girders are sectional rails, further comprising laterally projecting sectional portions each defining a support bracket for auxiliary support elements of the shelf system, wherein the auxiliary support elements are selected from the group consisting of crossbeams, yokes, shelf boards, separating rods and separating walls, the laterally projecting sectional portions each being part of auxiliary or additional girders, the auxiliary or additional girders extending parallel to the longitudinal direction of the longitudinal girders and being releasably hooked to the longitudinal girders, the auxiliary or additional girders each having an upper hooking portion and a lower abutment portion, each longitudinal girder having a top and a bottom, the auxiliary and additional girders being connectible merely with the upper hooking portion to the longitudinal girder at the top thereof by means of a hooking connection and being connectible with the lower abutment portion to the bottom of the longitudinal girder by means of a hooking connection, the support brackets being part of the auxiliary or additional girders extending between the upper hooking portion and the lower abutment portion.