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  6. Steel structure beam opening reinforcement method "Diar Ring"

Steel structure beam opening reinforcement method "Diar Ring"

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last updated:Jan 20, 2026

コーリョー建販 本社
コーリョー建販 本社
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Significantly improved workability! Introducing a construction method that ensures high product precision and easily secures construction accuracy.

The "DIA Ring" is a reinforcement method for openings targeting steel structure H-shaped cross-section beam members. Depending on the required load capacity, one DS type, one DL type, and two DS types can be used. When using one piece, the entire perimeter is welded on one side without inverting the beam, which greatly enhances workability. In construction, the welding sizes are standardized to 6mm for the DS type and 9mm for the DL type. Since all products of the DS type and DL types DL100 to DL200 are targeted products on both sides, they are easy to manage in terms of quality control. 【Features】 ■ Depending on the required load capacity, it is possible to choose between using one DS or DL type and using two DS types. ■ Significantly reduces the amount of welding required. ■ High product precision allows for easy assurance of construction accuracy. ■ Eliminates the need to "invert the beam" during installation, greatly improving workability. ■ Easy construction management. *For more details, please refer to the PDF materials or feel free to contact us.

    Reinforcement and repair materialsBridge ConstructionRenovation and repair methods
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Steel structure beam opening reinforcement method "Diar Ring"

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  • Related Link - https://www.koryo-kenpan.co.jp/products/index/3

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basic information

【Construction Procedure】 ■Determining Opening Position and Drilling Lower Holes ■Installation of Diamond Ring ■Assembly Welding ■Main Welding ■Inspection and Completion *For more details, please refer to the PDF document or feel free to contact us.

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【Usage】 ■ Steel beams in steel frame structures and steel-reinforced concrete beams *For more details, please refer to the PDF document or feel free to contact us.

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コーリョー建販

コーリョー建販 本社

Building materials, supplies and fixtures manufacturers

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Thorough quality control from material acceptance inspection to product shipment inspection, following the manufacturing procedure manual certified by the Japan Architecture Center. Low prices achieved by eliminating waste of materials and time with the latest fully automated machinery. Quick and flexible service, from calculating the shear strength of beams to calculating the reinforcement bars for hollow beams. (Free)

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