The invention relates to a car attachment (12) for receiving piece goods, in particular in the form of containers (40), for freight cars (3), to a freight car (3) comprising such a car attachment (12), to a freight transferring device comprising such freight cars (3), and to a freight transferring method for transferring the piece goods. The car attachment (12) is designed as a covered car attachment (12) and has an attachment base wall (28), two attachment lateral covers (29), two attachment end walls (30), and an attachment roof (31) which delimit a car interior (38). The car attachment (12) also has at least one vertical intermediate wall (36), which is perpendicular to the car longitudinal direction (12a), and at least one horizontal intermediate base (37a; 37b; 37c), said intermediate wall and intermediate base dividing the car interior (38) into multiple compartments (39), preferably cuboidal compartments.
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