The 500 Hay Project is the largest top-down construction project undertaken in WA to date. This major mixed-use development includes 7 levels of offices, 9 levels of hotel accommodation and a cinema complex located over a 3 level basement car park. Introduction of top-down construction methodology which was adopted in conjunction with the erection of a steel framed structure as an alternative to instituting post-tensioned concrete. Heavy steel sections (plunge columns) were installed in the foundation piles to very low tolerance specifications, requiring specialist guides and positional techniques.
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