A panel connector for interconnecting adjacent panels, wherein the panels have one or more flanges each having an edge. The connector comprises a portion of sheet material arranged to extend from the edge of the panel with a curved profile having an inner end adjacent the edge of the panel and an outer end. In transverse cross section, the curved profile includes a first portion extending from the inner end in a generally elliptical path and a second portion extending from the first portion to the outer end. The second portion curves inwardly from the generally elliptical path and the curved profile of the connector curves through at least 360 degrees. The second portion defines an opening between the inner end and the outer end to receive a portion of a further connector on an adjacent panel of the same shape.