MPN Group provided structural engineering services for buildings 1, 3, 5 & 7 Macquarie Street as well as the neighbouring Quay Grand apartments at 69 Macquarie Street on Bennelong Point overlooking the Sydney Opera House and Circular Quay.  This row of mid-rise apartments are now the most luxurious and sought after properties in the country.

The developments comprise a total of 500 apartments and penthouses.  The floor structure is pre-stressed concrete flat slabs to minimise structural depth and maximise clear heights within highly controlled planning guidelines.  The concrete vertical elements of lift, stair and inter-tenancy walls provide resistance against the wind and seismic loads, and act as transfer structures onto columns and beams below.  Linking buildings 1 and 3 at level 10 is a ‘Skybridge’ commercial space.  There is a complex geometric interaction of vertical elements and transfers of load above the commercial levels.

The development includes street level restaurants and retail shops, with two grand public spaces connecting Macquarie Street to Circular Quay East, where a dramatic colonnade runs the full length of the combined sites and is always busy with visitors to Sydney.

A six level basement, constructed with reinforced flat slab floors, provides for parking, a health club with a 25m indoor pool and below the Macquarie Street roadway, three cinemas and a rehearsal space for the Australian Chamber Orchestra.