An improved tray for rectifying and scrubbing columns is simply constructed by providing a cylindrical member coaxially within the column shell, placing beams radially between said member and shell, attaching one end of each beam to said member or shell, supporting the opposite free end of each beam on a ring fastened to the vertical surface adjacent to said free end, and fitting tray segments in locking arrangement between the beams which are circumferentially spaced from each other. The free ends of the beams supported on the ring, together with the locked-in tray segments, can move radially to accommodate differences in thermal expansion of the components of the column.