A joint structure (10) is disclosed for retaining the peripheral edge of a panel member (12), as is commonly found in sheet metal cabinets and the like. The joint structure includes an elongate member (14) or extrusion having first (16) and second (18), spaced-apart transverse flanges, the second flange including a base portion (20) and an outer portion (22) extending toward the first flange to form a C-shaped slot (24) between the flanges. The peripheral edge of the panel (12) is located in the C-shaped slot bearing against both flanges, and a threaded fastener (32) is mounted in one of the flanges disposed at an angle to bear against the panel edge portion and urge same into the slot and releasably retain the edge portion therein.
