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Sea Cliff Bridge
The Sea Cliff Bridge, together with the adjoining Lawrence Hargrave Drive Bridge, are two road bridges that carry the scenic Lawrence Hargrave Drive across the rockface on the Illawarra escarpment, located in the northern Illawarra region of New South Wales, Australia. The balanced cantilever and incremental launching girder bridges link the coastal villages of Coalcliff and Clifton and carry two lanes of traffic, and a pedestrian walkway. The Sea Cliff Bridge was named by Makenzie Russell, who at the time was an eleven-year-old student, following a naming competition opened to local primary school students. The Lawrence Hargrave Drive Bridge and the Lawrence Hargrave Drive are named in honour of Lawrence Hargrave, an Australian engineer, explorer, astronomer, inventor and aeronautical pioneer. History The Sea Cliff Bridge replaced a section of Lawrence Hargrave Drive that was permanently closed in August 2003 due to regular rock falls. A public outcry emerged over the road cl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lawrence Hargrave Drive
Lawrence Hargrave Drive, part of the Grand Pacific Drive, is a scenic coastal road and popular tourist drive connecting the northernmost suburbs of Wollongong, New South Wales, Australia, to Wollongong, in the south, and Sydney, in the north. The road was originally constructed in the 1870s as Lower Coast Road, until it was renamed in 1947 after Lawrence Hargrave, an Australian aviation pioneer and explorer who had a house at Stanwell Park and flew his devices from Bald Hill. Route The road begins at the Old Princes Highway, Helensburgh ( Princes Motorway exit) and passes through Stanwell Tops to descend the steep Illawarra Escarpment at Bald Hill, the site of a spectacular lookout and hang gliding area. The road then passes south through Stanwell Park and Coalcliff to cross the Sea Cliff Bridge and adjoining Lawrence Hargrave Drive Bridge. Together, the Sea Cliff Bridge and Lawrence Hargrave Drive Bridge construction were completed in December 2005, replacing the form ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Road Bridge
A bridge is a structure built to span a physical obstacle (such as a body of water, valley, road, or rail) without blocking the way underneath. It is constructed for the purpose of providing passage over the obstacle, which is usually something that is otherwise difficult or impossible to cross. There are many different designs of bridges, each serving a particular purpose and applicable to different situations. Designs of bridges vary depending on factors such as the function of the bridge, the nature of the terrain where the bridge is constructed and anchored, and the material used to make it, and the funds available to build it. The earliest bridges were likely made with fallen trees and stepping stones. The Neolithic people built boardwalk bridges across marshland. The Arkadiko Bridge (dating from the 13th century BC, in the Peloponnese) is one of the oldest arch bridges still in existence and use. Etymology The ''Oxford English Dictionary'' traces the origin of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boral
Boral Limited is Australia's largest building and construction materials supplier, with market-leading positions in quarries, cement, concrete and asphalt. Boral is actively pursuing a decarbonisation strategy through recycling of demolition materials, converting landfill and waste to energy and transitioning to 100 percent renewable electricity. With revenue for total operations of A$2.96 billion (2022), Boral has about 9,000 employees and contractors working across 356 operating and distribution sites. Its headquarters are located in Sydney, Australia. History Boral was founded by David Craig on 4 March 1946 as Bitumen and Oil Refineries (Australia) Limited with Caltex having a 40% shareholding. In March 1947, it opened Matraville Refinery, Australia's first bitumen and oil refinery. In 1963, the company was renamed Boral Limited having been commonly referred to by its acronym since it commenced trading. In 1964, it purchased the Gas Supply Company with 28 coal gas companie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Span (architecture)
Span is the distance between two intermediate supports for a structure, e.g. a beam or a bridge. A span can be closed by a solid beam or by a rope. The first kind is used for bridges, the second one for power lines, overhead telecommunication lines, some type of antennas or for aerial tramways. The span is a significant factor in finding the strength and size of a beam as it determines the maximum bending moment and deflection. The maximum bending moment M_ and deflection \delta_in the pictured beam is found using: :M_ = \frac :\delta_ = \frac = \frac where :q = Uniformly distributed load :L = Length of the beam between two supports (span) :E = Modulus of elasticity :I = Area moment of inertia The second moment of area, or second area moment, or quadratic moment of area and also known as the area moment of inertia, is a geometrical property of an area which reflects how its points are distributed with regard to an arbitrary axis. The ... Note that the maximum ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prestressed Concrete
Prestressed concrete is a form of concrete used in construction. It is substantially "prestressed" ( compressed) during production, in a manner that strengthens it against tensile forces which will exist when in service. Post-tensioned concreted is "structural concrete in which internal stresses have been introduced to reduce potential tensile stresses in the concrete resulting from loads." This compression is produced by the tensioning of high-strength "tendons" located within or adjacent to the concrete and is done to improve the performance of the concrete in service. Tendons may consist of single wires, multi-wire strands or threaded bars that are most commonly made from high-tensile steels, carbon fiber or aramid fiber. The essence of prestressed concrete is that once the initial compression has been applied, the resulting material has the characteristics of high-strength concrete when subject to any subsequent compression forces and of ductile high-strength steel when sub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wollongong
Wollongong ( ), colloquially referred to as The Gong, is a city located in the Illawarra region of New South Wales, Australia. The name is believed to originate from the Dharawal language, meaning either 'five islands/clouds', 'ground near water' or 'sound of the sea'. Wollongong lies on the narrow coastal strip between the Illawarra Escarpment and the Pacific Ocean, 85 kilometres (53 miles) south of central Sydney. Wollongong had an estimated urban population of 302,739 at June 2018, making it the third-largest city in New South Wales after Sydney and Newcastle and the tenth-largest city in Australia by population. The city's current Lord Mayor is Gordon Bradbery AM who was elected in 2021. The Wollongong area extends from Helensburgh in the north to Windang and Yallah in the south. Geologically, the city is located in the south-eastern part of the Sydney basin, which extends from Newcastle to Nowra. Wollongong is noted for its heavy industry, its port activity and the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helensburgh, New South Wales
Helensburgh, New South Wales, Australia is a small town, located 45 kilometres south of the Sydney central business district and north of Wollongong and north and above the Illawarra escarpment and region. Helensburgh is in the Wollongong City Council local government area. It is surrounded by bushland reserves being adjacent to the southern end of the Royal National Park and Garawarra State Conservation Area and the Woronora reservoir water catchment is to its west. Geography The town is on the Woronora Plateau. To the southeast, it is separated from Otford in the Hacking River valley below by a high ridge but linked to it by the South Coast Railway and Otford Road. It is separated from Waterfall by Garawarra State Conservation Area and the former Garawarra sanitorium but linked to it by the South Coast Railway with tight bends descending from the line's highest point at Waterfall to Helensburgh Station. To the north of Helensburgh and east of the railway line are the two ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Otford, New South Wales
Otford is a village in the Otford Valley located 55 km south of the Sydney CBD and 30 km north of Wollongong in New South Wales, Australia. Otford is within the local government area of the City of Wollongong. Location Otford is situated in the Otford Valley, north of Undola Ridge, Stanwell Park and Stanwell Tops. To the east of the valley is the coastal ridge and small community of Bulgo, also the name of a hill in the area and the former name of Otford. To the west, on the plateau, is the township of Helensburgh. To the north is the locality of Lilyvale and the Royal National Park. The town is on the southern tip of the Royal National Park and features many native plants in its bushland like the Dendrobium Lilly. The trees of the bushland are mostly of the dry Eucalypt variety but the valley slopes support tall open Eucalypt forest and rainforest along the creek and in gullies. The landscape is mostly hillside, and the Hacking River runs through the valley to the north ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stanwell Park, New South Wales
Stanwell Park is a coastal village and northern suburb of Wollongong, New South Wales, Australia. It is the northernmost point of the Illawarra coastal strip and lies south of Sydney's Royal National Park. It is situated in a small valley between Bald Hill to the north, Stanwell Tops to the west and Mount Mitchell to the south. It has two lagoons from the village's two creeks, Stanwell and Hargrave Creeks and a beach running between headlands. Stanwell Park and the surrounding suburbs are colloquially referred to by its postcode 2508. History Stanwell Park was the name given to the farm established on the grant given to Matthew John Gibbons in 1824. He was given most of the area called ''Little Bulli'' which included present-day Stanwell Park and Coalcliff. The whole of Northern Illawarra went under the Aboriginal name Bulli. Bulli remains the name of an Illawarra suburb further south of Stanwell Park. The area was originally inhabited by the Wodiwodi Aboriginal clan o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lawrence Hargrave
Lawrence Hargrave, MRAeS, (29 January 18506 July 1915) was a British-born Australian engineer, explorer, astronomer, inventor and aeronautical pioneer. Biography Lawrence Hargrave was born in Greenwich, England, the second son of John Fletcher Hargrave (later Attorney-General of NSW), and was educated at Queen Elizabeth's Grammar School, Kirkby Lonsdale, Westmorland, where there is now a building named in his honour. He immigrated to Australia at fifteen years of age with his family, arriving in Sydney on 5 November 1865 on the ''La Hogue''. He accepted a place on the ''Ellesmere'' and circumnavigated Australia. Although he had shown ability in mathematics at his English school he failed the matriculation examination and in 1867 took an engineering apprenticeship with the Australasian Steam Navigation Company in Sydney. He later found the experience of great use in constructing his models and his theories. In 1872, as an engineer, he sailed on the ''Maria'' on a voya ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pedestrian
A pedestrian is a person traveling on foot, whether walking or running. In modern times, the term usually refers to someone walking on a road or pavement, but this was not the case historically. The meaning of pedestrian is displayed with the morphemes ''ped-'' ('foot') and ''-ian'' ('characteristic of'). This word is derived from the Latin term ''pedester'' ('going on foot') and was first used (in English language) during the 18th century. It was originally used, and can still be used today, as an adjective meaning plain or dull. However, in this article it takes on its noun form and refers to someone who walks. The word pedestrian may have been used in middle French in the Recueil des Croniques et Anchiennes Istories de la Grant Bretaigne, à présent nommé Engleterre. In California the definition of a pedestrian has been broadened to include anyone on any human powered vehicle that is not a bicycle, as well as people operating self-propelled wheelchairs by reason of p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
