1975- Building Commences on top of the massive 50,000 Tonne Centrepoint Building which is the base for the 4,067, Tonne Tower.
The raising of the turret was assembled at the bottom of the shaft and jacked 250 metres above Pitt steet Sydney, at the rate of 9 metres a day. The units were made from high strength weathering steel called “AUSTEN 50” and were completed with lift rails, stairwell and hydraulic risers before being hoisted and stacked to form the shaft.
each 182 metres long and made up of 235 high tensile wires (No wider than a fingernail) were used to secure the structure. The design was derived from the spokes of a wheel and are an intregral part of the cylindrical shaft.
Tower completed and opened on the 27th September. The total cost to build the tower was $A$36 Million. The tower has been known by several names including Centrepoint Tower and The AMP Tower. However, its official name is Sydney Tower.
From a lofty 268 meteres high viewpoint you can be apart of the latest attraction called ‘Skywalk" where you can safely step outside onto the roof of the Tower’s Golden Turrrett. My son and I did just this and stepped out onto there see-through glass platform that hangs over the city! Stomach Churning!!!
@ The total weight of the tower (shaft and turret) is 4067 tonnes- the same as 4 Mnaly Ferries or 10 Jumbo Jets/
@ It is 2395 kilometeres from London to Athens or Melebourne to Cairns. If the wires in the tower’s securing cables were laid ened to end, they would cover the same distance.
@ The turret is home to a 162,000 litre water tank which acts as a stabiliser against wind movement and supports the Tower’s sprinkler system. If the tank held paint there would be enough to give the Sydney Harbour Bridge a paint job. The Tower is designed to with stand winds of up to 172kpm and even at this wind speed it would only sway to a maximum of 1 metre. Testing was done in the aeronautical wind tunnel at Sydney University and then with an aeroelastic model at the University of Western Ontario, Canada.
Photo taken by Canon IXUS