Corner joint member (1, 101, 201, 301, 401) for joining a first profiled tubular rod (10, 110) under an angle with a second profiled tubular rod (20, 210, 230, 240) by connecting ends of the first rod and the second rod to the corner joint member, the corner joint member (1, 101, 201, 301, 401) comprising - a first profiled connector element (11, 111, 211, 311, 411) having a first rod connecting end for connecting to the first rod (10, 110), wherein The first rod connecting end is open, wherein the first profiled connector element (11, 111, 211, 311, 411) further comprises a first oblique end opposing the first rod connecting end, wherein the first oblique end is open and has a profile, wherein the first profiled connector element (11, 111, 211, 311, 411) defines a first interior space limited by the first rod connecting end, the first oblique end and a first inner contour surface of the first element; - a second profiled connector element (21, 121, 221, 321, 421) having a second rod connecting end for connecting to the second rod, wherein the second rod connecting end is open, wherein the second profiled connector element (21, 121, 221, 321, 421) comprises a second oblique end opposing the second rod connecting end, wherein the second oblique end is open and has a profile, wherein the second profiled connector element (21, 121, 221, 321, 421) defines a second interior space limited by the second rod connecting end, the second oblique end and a second inner contour surface of the second element; wherein the first oblique end profile is similar to the second oblique end profile, such that in a connecting state, when the first oblique end profile adjoins to the second oblique end profile, a closing seam is defined between the oblique ends (13, 23), wherein the corner joint member (1, 101, 201, 301, 401) is in the connecting state and further comprises: - an auxiliary insert (5, 205, 305) arranged in the first- and second interior space (A, B), wherein an outer contour surface of the auxiliary insert (5, 205, 305) contacts the first inner contour surface of the first profiled connector element (11, 111, 211, 311, 411) as well as the second inner contour surface of the second profiled connector element (21, 121, 221, 321, 421); characterized in that the corner joint member (1, 101, 201, 301,4 01) further comprises - at least one first element weld (15a, 15b, 15c, 15d) between the outer contour surface of the auxiliary insert (5, 205, 305) and the first inner contour surface; - at least one second element weld (25a, 25b, 25c, 25d) between the outer contour surface of the auxiliary inser (5, 205, 305) and the second inner contour surface. - a first profiled connector element (11, 111, 211, 311, 411) having a first rod connecting end for connecting to the first rod (10, 110), wherein The first rod connecting end is open, wherein the first profiled connector element (11, 111, 211, 311, 411) further comprises a first oblique end opposing the first rod connecting end, wherein the first oblique end is open and has a profile, wherein the first profiled connector element (11, 111, 211, 311, 411) defines a first interior space limited by the first rod connecting end, the first oblique end and a first inner contour surface of the first element; - a second profiled connector element (21, 121, 221, 321, 421) having a second rod connecting end for connecting to the second rod, wherein the second rod connecting end is open, wherein the second profiled connector element (21, 121, 221, 321, 421) comprises a second oblique end opposing the second rod connecting end, wherein the second oblique end is open and has a profile, wherein the second profiled connector element (21, 121, 221, 321, 421) defines a second interior space limited by the second rod connecting end, the second oblique end and a second inner contour surface of the second element; - an auxiliary insert (5, 205, 305) arranged in the first- and second interior space (A, B), wherein an outer contour surface of the auxiliary insert (5, 205, 305) contacts the first inner contour surface of the first profiled connector element (11, 111, 211, 311, 411) as well as the second inner contour surface of the second profiled connector element (21, 121, 221, 321, 421); characterized in that the corner joint member (1, 101, 201, 301,4 01) further comprises - at least one first element weld (15a, 15b, 15c, 15d) between the outer contour surface of the auxiliary insert (5, 205, 305) and the first inner contour surface; - at least one second element weld (25a, 25b, 25c, 25d) between the outer contour surface of the auxiliary inser (5, 205, 305) and the second inner contour surface.