Providing at least two rotor blade sections (21, 22) fabricated and divided in the longitudinal direction (11) of the rotor blade (10), wherein the division is arranged between the leading edge (16) and the trailing edge (17), Applying or inserting a first web part (26) extending substantially from the pressure side (19) to the suction side (18) into a first divided rotor blade section (21) and a second web part (27) extending substantially from the pressure side (19) to the suction side (18) into a second divided rotor blade section (22) and Adhering the first web part (26) with the second web part (27) so that a double web (47) forms.
