Abstract: An expandable self-locking frame useful in the construction of temporary to permanent walls. The frame comprises a plurality of longitudinally extensible studs mounted along the length of a pair of elongated tracks. Each of the longitudinally extensible studs is provided with a longitudinal extension mechanism incorporating a locking mechanism with which a length of the frame can be adjusted. In a preferred embodiment, the outer longitudinally extensible struts of the frame are further provided with lateral extension mechanisms with which the width of the frame can be adjusted.