Shelving modules with a width of 69.6 cm mounted on legs or castors must be reinforced with a supporting construction, a support rail SS60, under the bottom to strengthen the module's load capacity and avoid deflection when the module is loaded and in use. The support rail is almost invisible, as it can be selected in all Montana's 41 lacquer colours and simply measures 4 cm in height and 60 cm in width. The rail is automatically included when ordering shelving modules on legs and castors but is also available as a separate component for retrofitting legs and castors.