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''Rautaruukki'' is a Finnish pusher vessel owned and operated by ESL Shipping. It is part of the ''Finnpusku'' integrated tug and barge system developed in the 1980s by Finnlines, a Finnish shipping company that also managed the vessel until 2003, in co-operation with Rautaruukki for the transportation needs of the steel company. ''Rautaruukki'', built by Hollming in Rauma, Finland, was delivered on 30 October 1986 and has since been used mainly to supply raw materials to the Raahe Steel Works. ''Rautaruukki'' has an identical sister vessel, ''Steel'', which was delivered in 1987 as ''Finn''. The vessel capsized in 1990, but was rebuilt, renamed and returned to service in 1991. == Development and construction == (詳細はsteel mill in Raahe by towed barges and found them suitable for the steel company's transportation needs. However, due to the poor maneuverability of the barges and their inability to operate in winter conditions, Rautaruukki decided to investigate if it would be possible to design a pusher-barge system that could also be operated in ice conditions. When Finnlines was consulted, it presented the ''Finnpusku'' system it had developed and the two companies signed a development contract. Later Finnlines performed several feasibility studies which showed that a pusher-barge system would be the most economical and efficient method of transporting bulk cargoes on the relatively short routes of the Baltic Sea.〔von Bruun-Riegels, U. Raaka-ainekuljetukset proomuilla. Rautaruukki Oy, 1991.〕 The initial plan was to establish shipping companies for each vessel of the ''Finnpusku'' system under the joint ownership of several large Finnish industrial and shipping companies, including Rautaruukki and Finnlines, which would also manage the vessels. However, due to delays in negotiations Rautaruukki, concerned about the continuous supply of raw materials to the Raahe Steel Works, decided to order one pusher and two barges for itself and signed a building contract with Hollming on 29 September 1984.〔A revolutionary pusher-barge system. Navigator 1985.〕 The first pusher of the ''Finnpusku'' system, ''Rautaruukki'', was laid down on 27 June and launched on 20 December 1985.〔 Pusher ''Rautaruukki'' and barges ''Kalla'' and ''Tasku'', built by a Portuguese shipyard Estaleiros Navais de Setubal in Setúbal and outfitted in Rauma, were delivered to Rautaruukki on 31 October 1986.〔 When the two pushers and five barges of the ''Finnpusku'' system entered service in 1986–1987, it was estimated that they would carry one third of the ten million tons of bulk cargo arriving in Finland by sea every year.〔Mauno, J. Finnpusku minimoi satama-ajan. Navigator 11/86.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Rautaruukki (pusher)」の詳細全文を読む スポンサード リンク
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