A printing assembly has a frame having two side walls, between which, a transport path for the transport of printing material, extends. A transport direction is defined by the transport path. The printing assembly has at least three cross bars which extend in a transverse direction between the side walls. They are arranged one behind the other with respect to the transport direction. The printing assembly has at least three printing heads which are arranged one behind the other. At least one first additional device, is arranged on each of the cross bars. At least one second additional device, is arranged on each of the crossbars.