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Photographer's Note

The Sydney Harbour Bridge was opened on the 19th March 1932. When opened, the Harbour Bridge was one of the greatest engineering masterpieces of its time.

Port Jackson (Sydney Harbour) had an impressive and instantly famous landmark made in a style that reflects the end of an industrial era.

The foundations, which are 12 metres (39 feet) deep, are set in sandstone. Anchoring tunnels are 36 metres (118 feet) long and dug into the bedrock at each end. Large bolts and nuts are used to tie the thrust bearings onto their supports.

It is interesting to note that the four pylons are actually placed mainly for aesthetic reasons on each corner of the bridge. The pylons are about 90 metres above the average water level. The Sydney Harbour Bridge design had to perform functionally and be pleasing to the eye as well. The pylons are made of concrete that is covered by grey granite from Moruya on the south coast of New South Wales.

When the bridge was constructed the use of reinforced concrete was in its infancy. Today the Harbour Bridge ranks second or third in the world in terms of span but it is still considered to be the greatest of its type in the world because of its load bearing capacity and width of nearly 50 metres.

The bridge was manufactured in sections on a site on the western side of Milsons Point. About eighty percent of the steel came from England while the remaining twenty percent was manufactured here in Australia. The construction of the arch was begun from both sides of the harbour with cable support for the arches. In 1930 the two arches met. The construction of the deck then proceeded from the middle outwards towards each shore as this was easier than moving the construction cranes back to the Pylons.

The main span is 503 meters (1,650 feet) across it consumed more than 52,800 tonnes of silicon based steel trusses. The plates of steel are held together by around 6 million steel rivets. It originally carried road transport, trains and pedestrians. From start to finish, the bridge and its approaches it took eight years to complete.

The bridge carries nearly 200,000 vehicles a day and hundreds of train movements.

CANON 20D/17mm-40mm f4L Lens
1/8 sec/ f/4 Exposure
ISO: 1600
Focal Length: 17/1mm
No Flash with Tripod
Night time with stormy sky
No post production except for border

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Additional Photos by Don McNicol (auscorp) Silver Note Writer [C: 3 W: 6 N: 10] (44)
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