Abstract: A door or other closure, partition or the like incorporating a plurality of substantially rigid panels having interengaging hinge structures formed unitarily along each side edge thereof with certain of the panels being supported by roller equipped carriage assemblies adapted to engage an overhead track. The hinge structures include means permitting relative vertical movement between adjacent panels to enable quick assembly and disassembly. An end clip for the hinge structures prevents relative vertical movement between adjacent panels after assembly with the clip being removable for disassembly. The overhead track is connected to a ceiling supported bracket or rail by an insert or latch which enables lateral engagement of the track with the bracket or rail to facilitate quick assembly and also to enable lateral disengagement of the track from the bracket or rail to enable quick removal or disassembly.