Method for producing a carrier component (1, 10, 11) for a vehicle application, comprising two half-shells (2, 3; 2, 3.1; 12, 13) that are U-shaped in cross-section, with the following steps: - Providing two half-shells (2, 3; 2, 3.1; 12, 13) adjacent to one another on contact sides, with different contact widths, - arranging and holding of the half-shells (2, 3; 2, 3.1; 12, 13) with their contact sides (7, 8) being adjacent while leaving a capillary gap, in such a way that the contact surfaces of one of the two half-shells (2, 12) protrude outwards in relation to the contact surface of the other half-shell (3, 3.1, 13), and this protrusion (9, 9.1, 9.2) is aligned pointing upwards, and the contact surfaces of the other half-shell (3, 3.1, 13) protrude inwards in relation to the contact surface of the first half-shell (2, 12), and this protrusion is aligned pointing downwards, characterised in that - the two half-shells (2, 3; 2, 3.1; 12, 13) are arranged in relation to one another in such a way that the overlap of the adjacent contact surfaces (7, 8) of the two half-shells (2, 3; 2, 3.1; 12, 13) amounts to more than 90% in relation to the width, wherein, in the presence of contact surfaces (7, 8) with different contact widths, this overlap relates to the lesser width, and then - simultaneous fusion welding from the outside, in order to achieve through-welding of the contact surfaces (7, 8), being held adjacent, of the opposing wall sections in order to form a weld seam extending over the joint overlap, and that - the fusion welding is carried out in such a way that the inside protrusion is used as a flux addition, and is integrated into the weld seam with the formation of a weld fillet. - Providing two half-shells (2, 3; 2, 3.1; 12, 13) adjacent to one another on contact sides, with different contact widths, - arranging and holding of the half-shells (2, 3; 2, 3.1; 12, 13) with their contact sides (7, 8) being adjacent while leaving a capillary gap, in such a way that the contact surfaces of one of the two half-shells (2, 12) protrude outwards in relation to the contact surface of the other half-shell (3, 3.1, 13), and this protrusion (9, 9.1, 9.2) is aligned pointing upwards, and the contact surfaces of the other half-shell (3, 3.1, 13) protrude inwards in relation to the contact surface of the first half-shell (2, 12), and this protrusion is aligned pointing downwards, characterised in that - the two half-shells (2, 3; 2, 3.1; 12, 13) are arranged in relation to one another in such a way that the overlap of the adjacent contact surfaces (7, 8) of the two half-shells (2, 3; 2, 3.1; 12, 13) amounts to more than 90% in relation to the width, wherein, in the presence of contact surfaces (7, 8) with different contact widths, this overlap relates to the lesser width, and then - simultaneous fusion welding from the outside, in order to achieve through-welding of the contact surfaces (7, 8), being held adjacent, of the opposing wall sections in order to form a weld seam extending over the joint overlap, and that - the fusion welding is carried out in such a way that the inside protrusion is used as a flux addition, and is integrated into the weld seam with the formation of a weld fillet.