The invention refers to a telescoping frame assembly (1) for height adjustment adjacent a wall (23) comprising: bracket structure for structure load mounting; self-blocking telescoping columns for height adjustment; movement of telescoping columns synchronized by mechanical means and/or common control of individual actuators; one telescoping column part being wall-mounted with possible supporting foot; with: a separate main beam (42) of constant circumscribed profile for horizontal arrangement and having means (52, 53) along its length for positioning and fixation of both vertical telescoping columns and horizontal brackets, with freely selectable positions along the main beam (42); telescoping columns (43) as separate units with specific positioning and fixation means (49, 54) for mounting to the main beam (42) at the selected positions; and brackets (44) as separate units provided with specific positioning and fixation means (47, 48, 49, 50) for mounting to the main beam (42) at the selected positions. The invention also refers to the use of such an assembly for, e.g., the mounting of basins and tubs.