in particular in a floating manner because the part of the carcass rail is arranged in the majority of cases at a position in the furniture carcass 2 which can hardly be seen or can absolutely not be seen mounting with for example movement play cannot create an unfavorable visual impression consequently the rear rail region of the carcass rail in the design shown can be utilized advantageously for the sturdy and stress free mounting of the carcass rail 5 in addition with regard to mounting the carcass rail is consequently relatively narrow only in the front region whilst a rear supporting means can be adapted in a variable manner to the conditions in particular to the mounting possibilities of an item of furniture 1 fig5 shows a third exemplary embodiment for a carcass rail 5 according to the invention the carcass rail 5 provides a simplified design of the design shown in fig2 3 and 4 a all structural features of the carcass rail 5 also being present in the exemplary embodiment in fig2 and being already described in this connection by way of the carcass rail 5 which is shown in fig5 the production thereof will be described below to this end fig6 shows a metal sheet 30 on which boundary edges 24 25 26 27 and 28 of two outlines of two sheet.