Abstract: A connector designed to couple a C-profile bar of synthetic resin or the like with another structural member comprises a shank terminating in a hammerhead which fits sideways into the slot formed by the C-flanges and is then rotated through 90.degree. within the channel of the profile. A point carried on a transverse surface of the hammerhead, remote from the shaft, digs into the channel bottom upon such rotation as a pair of ramp faces on an opposite base surface coact with the C-flanges to cam the hammerhead more deeply into the channel whereby the connector is secured against longitudinal shifting in the profile.

Abstract: A wall structure to be used as a partition, screen or the like comprises a plurality of panels with vertical edges attached to resilient profiles of the same or lesser height having strip portions which are substantially cylindrically curved over an arc of slightly more than 180.degree., these curved portions being peripherally interconvoluted about a common vertical axis forming the intersection of the vertical longitudinal midplanes of all the panels. The tubular hinge formed by the interconvoluted portions is immobilizable, in any relative angular position of the panels, by expandable plugs inserted into it from opposite ends.