Rialto Tower


Melbourne, Victoria




Rialto Joint Venture


Gerard de Preu & Partners in association with Perrott Lyon Mathieson Pty Ltd


Structural Engineering

Rising 243 Metres above Collins Street this 65 Storey office building was the tallest office building in the Southern Hemisphere and second tallest reinforced concrete building in the world at the time of its completion in 1985.

Meinhardt is responsible for the foundation and structural design of this USD240M office and hotel development of GFA144,000m2. Structurally the building consists of central service and lift cores in each tower with reinforced concrete band beam and slab floors spanning between the cores and the perimeter columns. The five level car parks are of reinforced concrete flat plate construction. Services provided by Meinhardt included structural design, documentation and site supervision. Features of the project included the use of 76 reinforced concrete caissons, 1800 and 1500 in diameter up to 40m deep to overcome the difficult ground conditions in the area and differential shrinkage and creep between the two towers of differing heights was overcome elegantly and simply by partial prestressing of the shorter northern tower's columns to stimulate the load due to the differing tower height thus achieving the same shrinkage and creep for both towers. The contribution of Meinhardt to the art of structural engineering has been recognised by a commendation from the Institution of Structural Engineers, UK.