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The "Rumoi Ohashi" is a long bridge located at the terminal end of the Fukagawa Rumoi Expressway. The bridge features a mix of different types, including "narrow box girder bridge" and "plate girder bridge." The construction on the national road and land sections was carried out using a typical bent combined crane setup with 300t and 200t crawler cranes, while a special installation equipment, a 650t·m traveler crane, was used for the construction over the Rumoi River. Additionally, during the construction of the deck slab, a composite slab with a bottom steel plate that also functions as a formwork was erected using cranes, followed by the placement of rebar and concrete. 【Overview】 ■ Bridge length: 339m (span lengths of 46m + 94m + 55m + 55m + 58m + 29m) ■ Bridge type: 3-span continuous narrow box girder + 3-span continuous minor girder bridge (mixed bridge) ■ Factory fabrication weight: 1,022.1t ■ Factory painting area: 14,750m2 ■ Transportation weight: 1,195.5t *For more details, please refer to the PDF document or feel free to contact us.
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【Until the Bridge is Completed】 ■ Cutting, Processing, Assembly: Large thick plates are cut and assembled into the shape of girders. ■ Welding: The assembled thick plates are joined together by welding to complete the girders. ■ Temporary Assembly: To check for any issues, the girders are assembled once in the factory. ■ Transportation: The girders manufactured in the factory are transported to the site using large trailers. ■ Erection: The girders are erected using heavy machinery such as large cranes (erection by a 650t·m travel crane). ■ Deck: The deck for vehicle traffic is completed by constructing it with concrete. *For more details, please refer to the PDF document or feel free to contact us.
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For more details, please refer to the PDF document or feel free to contact us.
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Our company is a comprehensive engineering firm specializing in steel structure products, starting with bridge projects. With advanced technology and extensive experience cultivated over many years, we respond to our customers' needs through the design, construction, and maintenance of bridges and steel structures, providing high-quality social infrastructure. Please feel free to contact us if you have any inquiries.