An interior wall mounting device comprising an elongated element having a base plate (20) and at least one side flange (22) projecting laterally from the base plate. The free edge of the side flange is turned inwardly to form a channel opening (24) in a direction normal to the base plate and outwardly therefrom. The channel is adapted to have a plurality of studs (33) securable laterally to the channel and shaped to receive the edge of a planar sheet (81) securable against the studs to form a wall.
