Support assembly for a trailer coupling or a load bearing device with a fibre material element

The carrier arrangement (410) has a transverse carrier (411) and a side carrier (412) for mounting on a rear of a body (K) of a vehicle (F), where the side carrier is connected with the transverse carrier. A holder (415') is arranged to the transverse carrier for a trailer coupling or for a coupling part (M) of a load carrier (L). A support component of the carrier arrangement is reinforced by a fiber material element which has a fiber arrangement. An independent claim is included for a method for manufacturing a carrier arrangement.