The invention relates to a main-frame bar and/or to a wing-frame bar for a main frame and/or a wing frame of a window, of a door, or of a fa ade element, having at least the following features: a mainprofiled element (300, 400) having a substantially U-shaped cross-section in single- or multi-piece design, which has, as viewed in a cross-section, a short leg (12), a long leg (13), and a transverse leg (14) formed therebetween, wherein a free intermediate space is formed between the ends of the short leg (12) and of the long leg (13) facing away from the transverse leg (14), a cover element and/or a fitting part extending over the intermediate space at least in some sections, wherein the short leg (12) and the long leg (13) of the main profiled element (300, 400) have multi-function contours (20, 21) on the inner sides thereof facing each other, which multi-function contours completely or partially bound at least the following groove: in each case, a fastening groove (20b, 21b) open inthe same direction on the side facing away from the transverse leg (14) for fastening a corresponding fastening means of the fitting part or of the cover element.