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TW: Siapapun Pelaksananya yang Penting JSS Dibangun

Jakarta - Pemilik Artha Graha Network Tomy Winata mengaku akan selalu bersikap patuh dan loyal terhadap apapun keputusan resmi pemerintah pusat dan juga Pemda Lampung dan Banten. Hal ini terkait rencana revisi Peraturan Presiden No. 86 Tahun 2011 tentang Pengembangan Kawasan Strategis dan Infrastruktur Selat Sunda (KSISS), yang akan diputuskan hari ini.

Menurutnya apapun yang terjadi, sebagai bagian dari pemrakarsa JSS/KSISS, ia akan loyal menyesuaikan Perpres soal JSS. Tomy menganggap, aturan itu harus secara syah dan legal, demi kredibilitas Pemerintah dan presiden.

"Sikap ini kami ambil demi suksesnya pembangunan KSISS/JSS oleh siapapun pelaksananya yang dipercaya Pemerintah pusat/Pemprov, agar rakyat Indonesia, khususnya masyarakat Lampung/Banten terangkat kesejahteraannya," kata Tomy kepada detikFinance, Minggu malam (15/7/2012)....

Sumber :

http://finance.detik.com/read/2012/07/16/095426/1966007/4/tw-siapapun-pelaksananya-yang-penting-jembatan-selat-sunda-dibangun

TYPES OF BRIDGES
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Bridge designs differ in the way they support loads. These loads include the weight of the bridges themselves, the weight of the material used to build the bridges, and the weight and stresses of the vehicles crossing them. There are basically eight common bridge designs: beam, cantilever, arch, truss, suspension, cable-stayed, movable, and floating bridges. Combination bridges may incorporate two or more of the above designs into a bridge.

Each design differs in appearance, construction methods and materials used, and overall expense. Some designs are better for long spans. Beam bridges typically span the shortest distances, while suspension and cable-stayed bridges span the greatest distances.

A.Beam Bridges

Beam bridges represent the simplest of all bridge designs. A beam bridge consists of a rigid horizontal member called a beam that is supported at both ends, either by a natural land structure, such as the banks of a river, or by vertical posts called piers. Beam bridges are the most commonly used bridges in highway construction. Single-piece, rolled-steel beams can support spans of 15 to 30 m (50 to 100 ft). Heavier, reinforced beams and girders are used for longer spans.
B.Cantilever Bridges
Cantilever bridges are a more complex version of the beam-bridge design. In a cantilever design, a tower is built on each side of the obstacle to be crossed, and the bridge is built outward, or cantilevered, from each tower. The towers support the entire load of the cantilevered arms. The arms are spaced so that a small suspended span can be inserted between them. The cantilevered arms support the suspended span, and the downward force of the span is absorbed by the towers.

Cantilever bridges are self-supporting during construction. They are often used in situations in which the use of scaffolding or other temporary supports would be difficult. The Forth Bridge, a railway bridge across the Firth of Forth in Queensferry, Scotland, has two main spans of 521 m (1,710 ft) each. The H?ora (Howrah) Bridge in Calcutta (now Kolkata), India, was opened in 1943, with a main span of 457 m (1,500 ft). The Québec Bridge across the St. Lawrence River in Canada has a span of 549 m (1,800 ft).

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