The Forum

St Leonards, New South Wales, Australia

Cost-effective design optimization for a new railway station and multi-use complex

The Forum complex includes a new railway station, a central plaza with two levels of retail, three separate commercial buildings, two residential towers with swimming pools, gymnasiums and childcare facilities, and up to nine levels of basement car parking. We were involved from the beginning of the project, advising at the design development and documentation stages, and throughout construction and commissioning.

In addition to traffic noise from the Pacific Highway and airborne railway noise, the main issue was the consideration of railway vibration and structure-borne noise. We were extensively involved in decision making regarding acoustic performance, buildability, risk, maintenance and cost. A design incorporating acoustic isolation using bearing pads and acoustic separation between the basement carpark levels and the surrounding ground was employed.

At the completion of the project, we conducted extensive compliance testing. This assessment included aspects of rail vibration and structure-borne noise, rail and traffic noise, Building Code of Australia requirements and mechanical plant noise. The measurement results obtained verified that the acoustic design, in all aspects of the project, achieved the design requirements. The results are particularly pleasing since in every area they agree well with the predicted levels, indicating that the design was optimised and cost effective.


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