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  6. Reinforcement of existing beam after hole cutting: "Redouble Method"

Reinforcement of existing beam after hole cutting: "Redouble Method"

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last updated:Jan 16, 2026

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Post-extraction opening reinforcement of beams using carbon fiber and cast steel plates - 'Redouble Method'

The "Ridabble Method" is a reinforcement technique that uses carbon fiber sheets, carbon fiber plates, and specialized anchoring hardware (cast steel plates) to shear-reinforce the cut-out sections of existing beams, allowing them to achieve a load-bearing capacity equal to or greater than that of the beams before the openings. This method has obtained general evaluation certification. Unlike traditional anchoring methods using L angles or flat bars for carbon fiber sheets, this method is compact and simple, yet ensures reliable anchoring of the carbon fiber sheets. There are two types of anchoring plates: flat type and vertical type, which can also be applied to reinforcement of wall-mounted columns and T-shaped beams. 【Features】 ■ A method that has obtained general evaluation certification for opening reinforcement General evaluation (Public Interest Incorporated Foundation) Better Living CBL RC001-10 ■ Suitable for opening reinforcement due to equipment renewal ■ Allows for pseudo-closed reinforcement through the use of anchoring hardware ■ Applicable to underground beams as well *For more details, please refer to the PDF materials or feel free to contact us.

    Paving Machine
20220307_イプロス広告-リダブル.png

Reinforcement of existing beam after hole cutting: "Redouble Method"

20220307_イプロス広告-リダブル.png
20220307_イプロス広告-リダブル.png リダブル工法イメージ_U型説明.jpg リダブル工法イメージ_I型説明.jpg リダブル工法イメージ_補強部材.jpg リダブル工法イメージ_評定書表面0009.jpg 1.jpeg
  • Related Link - https://www.constec.co.jp/construction/587/
  • Special site - Product/service details - https://pr.www.ipros.com/constec/product/

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basic information

【Reinforcement Type】 ■U Shape ■I Shape *For more details, please refer to the PDF document or feel free to contact us.

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Applications/Examples of results

【Usage】 ■Hole Reinforcement *For more details, please refer to the PDF document or feel free to contact us.

Detailed information

  • I型施工01材軸シート貼りIMGP6189.jpg

    Construction Procedure (Type I) 1. Attach CF sheet in the material axis direction.

  • I型施工02梁せいシート貼りPICT0081.jpg

    Construction procedure (Type I) 2. Attach CF sheet in an I-shape along the beam direction.

  • I型施工03CFプレート貼りPICT0083.jpg

    Construction Procedure (Type I) 3. Attachment of CF Plate

  • I型施工04金物取付IMGP6209.jpg

    Construction Procedure (Type I) 4. Installation of anchoring hardware

  • I型施工05定着部シート貼りPICT0086.jpg

    Construction Procedure (Type I) 5. Attaching CF sheet to the fixed part

  • I型施工06完了PICT0087.jpg

    Construction completed (Type I)

  • U型施工06完了0008.jpg

    Construction completed (U-type)

  • 詳細_リダブル工法_金物.jpg

    Anchor hardware

  • 詳細_リダブル工法_定着方法.jpg

    Method of fixing CF sheets using anchoring hardware (for flat plates)

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Reinforcement Method "Redouble Method"

Reinforcement Method "Redouble Method"

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Technical Document on the Ridouble Method_Development Experiment Report_Constech Technical Report No. 11 Excerpt

Technical Document on the Ridouble Method_Development Experiment Report_Constech Technical Report No. 11 Excerpt

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Redouble Method Technical Documentation_Expanded Application Range Experimental Report_Constec Technical Report No. 14 Excerpt

Redouble Method Technical Documentation_Expanded Application Range Experimental Report_Constec Technical Report No. 14 Excerpt

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General contractors and subcontractors

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Our company has consistently engaged in the investigation and diagnosis of reinforced concrete buildings, as well as renovation work, and from seismic diagnosis to seismic reinforcement work for many years. In recent years, we have been working as a specialized company focused on various issues such as the maintenance and preservation of various buildings and structures, improving seismic performance, environmental measures, energy conservation, and resource conservation. We will continue to respond swiftly to the diversified needs related to the safety and security of society and contribute to the creation of a "happy environment" in society.

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