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Stirrups, also known as hoop reinforcement, closed ties, or closed hoops, are steel bars bent into square, rectangular, circular, or trapezoidal shapes and used to confine the longitudinal bars in concrete beams, columns, and shear walls. They play a key role in resisting shear forces, preventing buckling, and enhancing the ductility of structural members under load. Yoshine produces stirrups from HRB400, HRB500, or HPB300-grade steel, following precise bending processes to meet the requirements of GB1499.2, BS4449, and ASTM A615 standards. They are used in both cast-in-place and precast concrete components across all types of building and infrastructure projects.
Bar Diameter (mm) | Stirrup Shape | Opening Size (mm) | Steel Grade |
6–8 | Rectangular / Square | 100x150 / 200x200 | HPB300 |
8–10 | Circular or Spiral | 100–400 diameter | HRB400 |
10–12 | Trapezoidal or Polygonal | Customizable | HRB400 / HRB500 |
6–12 | Multi-leg or Combined | Variable | HRB400 |
Custom | Custom Shape | Per Drawing | As Required |
Yoshine offers fully customized stirrup fabrication based on bending schedules or reinforcement drawings. We use automated CNC machines to ensure precise angles, lengths, and shapes. Each stirrup can be packaged and labeled by batch and project section for easy site distribution and installation.
• Engineered to provide shear resistance and tie longitudinal bars securely.
• Available in multiple shapes including rectangular, circular, trapezoidal, and spiral.
• Fabricated from HRB400, HRB500, or HPB300 steel bars.
• Essential for seismic zones due to their confinement effect.
• Compliant with GB1499.2, ASTM A615, BS4449, and ISO 9001 quality standards.
Yoshine stirrups are manufactured under ISO 9001-certified processes with calibrated bending machinery and skilled technicians. We ensure compliance with GB1499.2 (China), ASTM A615 (USA), and BS4449 (UK) by conducting dimensional, mechanical, and material tests on each production batch. All stirrups come with traceable mill certificates and meet international building code requirements for export.
✅ Critical for Structural Performance
Stirrups improve the shear capacity and ductility of reinforced concrete members by preventing rebar buckling and maintaining spacing under load.
✅ Factory Precision & High Volume Output
Produced on CNC machines, stirrups are dimensionally accurate, consistent in quality, and suitable for mass reinforcement placement.
✅ Ready for Quick Installation
Delivered pre-bent to specification, stirrups save labor and time at the jobsite by eliminating manual bending work.
✅ Versatile in Shape & Size
Stirrups can be made to fit a wide variety of structural cross-sections and reinforcement layouts, including combined and multi-leg types.
✅ Certified & Globally Accepted
Backed by compliance with ASTM, BS, GB, and ISO standards, our stirrups are fully approved for use in reinforced concrete works worldwide.
Region / Standard | Equivalent Grade / Name |
China (GB1499.2) | Stirrups (HRB400 / HPB300 / HRB500) |
USA (ASTM A615) | Closed Tie / Hoop Rebar / Spiral Reinforcement |
UK (BS 4449) | Stirrups / Links for Reinforcement |
International Naming | Stirrups / Hoops / Closed Ties / Spiral Bars |
Stirrups, also known as hoop reinforcement, closed ties, or closed hoops, are steel bars bent into square, rectangular, circular, or trapezoidal shapes and used to confine the longitudinal bars in concrete beams, columns, and shear walls. They play a key role in resisting shear forces, preventing buckling, and enhancing the ductility of structural members under load. Yoshine produces stirrups from HRB400, HRB500, or HPB300-grade steel, following precise bending processes to meet the requirements of GB1499.2, BS4449, and ASTM A615 standards. They are used in both cast-in-place and precast concrete components across all types of building and infrastructure projects.
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