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Sydney Harbour Bridge

Sydney Harbour Bridge

52,800 tonnes of steel. 6,000,000 steel rivets. Approximately 1000 metres long. An iconic sight, and a landmark recognized around the globe. Welcome to the Sydney Harbour Bridge.

According to the information maintained by the Australian Government, the suggestion for a bridge allowing commuters to bypass the busy Harbour area, was first made all the way back in 1815 by Francis Greenway. Of course, it took years before that dream could be realized.

The local governing bodies invited design submissions in 1900, but it would take years for one to be approved and the tender floated.

Sydney had to wait until after the end of the First World War, for more serious plans to come to fruition. A general design for the proposed bridge was prepared by Dr. J J C Bradfield, and officers of the NSW Department of Public Works. The state government then invited tenders from around the world, with the final contract being awarded to the English firm,  Dorman Long and Co of Middlesbrough.

Construction on the “Sydney Harbour Bridge” began in 1924. It would take 1400 men, 8 years, 6 million hand driven rivets, and about 53,000 tons of steel to build the edifice that stands as a symbol for the city today. It cost the government 4.2 million dollars to construct. The bridge now has 8 traffic lanes, 2 of which used to be tram tracks before the trams were decommissioned in the 1950s. There are also 2 rail lines on the bridge, one in each direction.

Inaugurated on the 19th of March, 1932, by the NSW Premier, the Honourable John ‘Jack’ T. Lang, the bridge has since seen millions of vehicles, trains and foot traffic.

A huge tourist attraction – BridgeClimb, started in 1998, pulling in tourists and locals alike. It allows climbers to ascend the catwalks on the bridge all the way to the top. The universal opinion is that the spectacular view is worth the climb up ladders and stairs. The climbs are scheduled throughout the day, during twilight and at night as well. Understandably, safety precautions are detailed, including a blood alcohol reading and a climb simulator, which helps climbers anticipate the conditions they are about to experience.
By all accounts, the BridgeClimb is breath-taking, and is always listed as a must-do for visitors to Sydney. Royals like Prince Frederik and Princess Mary of Denmark, and celebrities like Matt Damon, Hugo Weaving, Sarah Ferguson, Cathy Freeman, Kylie Minogue and Kostya Tszyu all having done the Climb.

Almost all the components for the construction of this bridge were custom made, and designed specifically for this structure. An example would be the hand driven rivets, which were done to be as accurate as possible. At Oasis Metals, we produce high quality steel gratings and structure support beams like the ones used in the construction of the Sydney Harbour bridge. We take into account your designs, your requirements, and provide you with high quality products that ensure longevity, and stability. Our bottom line is our high rate of client satisfaction, and in this endeavour, we will not waver.

Bonus Fun Fact:

The top of the Sydney Harbour Bridge arch actually rises and falls about 180 mm due to changes in the temperature!

Types of Scaffolding

Types of Scaffolding

Scaffolding is a platform temporarily constructed to enable construction workers access different heights and carry out work on the building that is being constructed. It is made from steel, bamboo or timber. Steel is most commonly used because of its strength and durability. It is not only used to provide workers with access to the work area but also to carry building materials to various levels of the structure.

The following are the types of Scaffolding and the advantages they have to offer at a construction site. It is vital to choose the right kind, depending on the kind of building that is being constructed.

 

Supported Scaffolding:

One of the most used scaffolding at construction sites. They are used for the construction of tall structures. This is because they can provide the needed height for workers to access the work area. They are also safe to use because additional support can be added to the scaffolding structure if it is required to bear a lot of weight. They are also available at affordable prices.

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Suspended Scaffolding:

Suspended scaffolding is used when it is not possible to construct scaffolding from the base. And therefore the scaffolding is suspended from a roof or a tall building. It is used when repairs need to be carried out on the upper levels of buildings. The advantage is that workers can access high levels of the building but only one or two workers can use it at a time. They are easy and convenient to install.

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Rolling Scaffolding:

They are similar to supported scaffolding but the difference being they have wheels at the base. They can be moved easily moved to the place where the construction worker needs to work. The wheels are locked when it has been moved, and therefore they are secure to use. Another advantage is that it is not required to be deconstructed each time the work is completed; because they are mobile.  And they allow workers access to longer areas.

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Aerial Lifts:

Aerial lifts are mounted on vehicles with a telescopic and rotating boom. They are most commonly used when workers only need to access the exterior of the building, like during the installation of windows. Aerial lifts provide access to multiple levels at different times and can carry many workers with materials that are required for the job. It is very safe to use aerial lifts.

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