Abstract: A corner connector (3) joins together two orthogonally disposed sections (1, 2) with C-shaped connecting means. The sections (1,2) have two flanges (11) with a strut (12) on each projecting inwards. The corner connector (3) comprises two angular pieces (4), at least two wedging pieces (5), at least two bolts (6) and at least two clamping pieces (7). The angular pieces (4) have on each flange a wedging surface (22) that press against the nose (14) of the struts (12), and a wedging surface (28) on the side opposite the flange. The wedging piece (5) is drawn by bolt (6) over the wedging surface (28) between the flanges (20), causing the flanges (20) to be tensed against the section. The clamping pieces (7) engage on the projections (13) on the struts (12). The wedging pieces (5) tensed against the clamping pieces (7) do not cause the flanges (11) to be spread apart. This arrangement results in a joint exhibiting high bend strength and high tensile strength in particular by means of friction.