Two-piece stiffening element

A stiffening element for mounting onto an inner surface of a structure, comprising:

• a stiffening profile part which comprises a first metal, and
• a foot part comprising a second metal,
• wherein the stiffening element is assembled in a hybrid form;
• wherein the stiffening profile and the foot part are aligned and integrally connected to one another along their entire lengths;
• wherein the stiffening profile part is secured to the foot part so as to form a permanent connection;
• wherein the foot part is at least one of L-shaped, and T-shaped profile part;
• wherein a plurality of stringers are mounted on the inner surface of the structure and running parallel to each other in a longitudinal direction of the structure;
• wherein a plurality of cutouts in said foot part are geometrically configured such that the plurality of stringers pass through the stiffening element without being contacted by the stiffening profile part of said stiffening element, and
• wherein the foot part of the stiffening element is configured such that it rests flat on both the inner surface of the structure, and over the mounted sections of said plurality of stringers.