A frame construction adapted for use in framing panels and forming parallelepiped configurations. The frame construction includes tubular panel edging elements, each defining a pair of opposed arcuate leg portions and interconnecting bight portions, with the legs defining spaced inturned distal ends cooperatively defining a panel edge receiving space. The edging elements are connected by means of corner connectors which connect the ends of a pair of the edging elements. The corner connectors include a body portion defining first and second perpendicularly related portions, a first pair of tongues extending in spaced parallel relationship from the first portion, with each tongue thereof having a segmentally cylindrical outer surface adapted to frictionally engage the arcuate leg portions of the edging elements. Each tongue further defines a planar inner surface adapted to frictionally engage one of the leg distal ends of the edging element and maintain the leg distal ends against spreading apart and to provide an improved effective support of the panel edges.