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The Tasman Bridge is a prestressed concrete girder bridge connecting the Tasman Highway over the River Derwent in Hobart, Tasmania, Australia. When it opened on 29 March 1965, [ 1 ] the Tasman was the longest prestressed concrete bridge in Australia, [ 3 ] with a total length measuring 1,396 metres (4,580 ft), including approaches. [ 4 ]
Posts on a deck are also typically pressure treated wood and standard sizes are 4x4, 6x6, and 8x8. These posts give structural support to the railing assembly and are the most critical part for the safety of the guard rail assembly. [15] In between the posts, two 2x4s are attached to the posts with screws for the best connection.
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Reinforced concrete slabs lie atop these beams to create a unified deck. [3] Concrete balustrades and newels create a railing on the east and west sides of the bridge. [6] [9] The road is 45 feet (14 m) wide, and 8-foot (2.4 m) sidewalks are on either side of the roadway. [2] Granite curbs define the cement sidewalk. [9] The deck is topped by ...
[25] [26] The bridge was rehabilitated again in 2017–19 by the American Bridge Company at a cost of $21.1 million. This project included replacement of the deck, sidewalks, and lighting, structural repairs, painting, waterproofing, and installation of a novel system to dehumidify the bridge cables. [3] [27]
The simplest beam bridge could be a log (see log bridge), a wood plank, or a stone slab (see clapper bridge) laid across a stream. Bridges designed for modern infrastructure will usually be constructed of steel or reinforced concrete, or a combination of both. The concrete elements may be reinforced or prestressed.
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