Abstract: A structural member for mounting in a groove formed along a panel of a cabinet. This member has a base with a central dividing wall projecting from its top face and a pair of lateral wings converging, at 45.degree., from the side edges of the base, toward the central wall and terminating short of the central wall. The base, the central wall and the wings define a pair of outwardly open cavities each having a generally right angle trapezoidal contour in cross-section and extending along the base. A securing wall projects from the bottom face of the base and has tangs formed on lateral faces, these tangs being turned toward the bottom face of the base.