A corner stud (50) has intersecting first and second walls (52, 54) that back up corner edge portions of wallboard panels (40, 42) that meet at the inside corner. The walls (52, 54) are braced by walls (64, 70) and flanges (76, 78). Wall (52) and wall (70) may be parallel to each other and to flange (76). Wall (54) and wall (64) may be parallel to each other and flange (78). The stud (50, 52, 200, 202) may have a web bent about a longitudinal axis to form web parts separated by an inside angle (a). The angle a may be an obtuse angle below one hundred eighty degrees (180°) to about two hundred seventy degrees (270°).