Steel Structure Torsion Shear Bolt
Product advantages: Precise and stable pre-tensioning; the requirement is met simply by twisting off the hexagonal head, minimising human error; high construction efficiency and straightforward inspection; slip-resistant and vibration-resistant; facilitates effective quality control; suitable for all types of steel structure projects.
Product Description
The preload of torsional-shear bolts in steel structures is stable and controllable; the bolt is considered fully tightened once the star-shaped head breaks off, meaning the process is not affected by the fitter’s technique and minimises the risk of missed or insufficient tightening. This makes inspection straightforward and hassle-free, whilst providing resistance to slippage and vibration, making them suitable for factory buildings, steel frames and bridge projects, thereby ensuring engineering safety. Furthermore, installation is rapid and does not require repeated torque measurements, helping construction sites save on labour costs and meet tight deadlines.
Product Advantages
- Precise and stable preload: The axial force is controlled via the torsional shear neck fracture, thereby eliminating human operational errors. This ensures high consistency in connections, excellent resistance to slippage and fatigue, and minimal loosening under long-term loading;
- Simple installation and acceptance: Installed using a specialised spanner; the connection is deemed secure once the star-shaped head is sheared off, eliminating the need for individual torque re-testing, which significantly reduces labour costs and accelerates the construction schedule;
- Mature and stable manufacturing process: Rigorous quenching and tempering heat treatment and phosphating processes ensure high thread precision, with matching nuts and washers supplied as a complete set.
Case Studies
Industrial plants, warehousing and logistics parks
Applications: Joints between steel columns and beams, crane girders, roof trusses, joints in portal frames, and primary connection points on racking systems in automated warehouses
Why choose torsional shear bolts: Factory construction often involves working at height, involves a large volume of work and is subject to tight deadlines; the bolt is deemed compliant once the star-shaped head is snapped off, allowing for visual inspection without the need for individual torque re-testing. Workers can master the technique quickly, ensuring a consistent pass rate, making them suitable for large-scale construction projects. Crane beams are subject to long-term, repeated vibrations; torsional shear bolts maintain a stable preload and are not prone to loosening.
Large-span public buildings
Applications: Spatial trusses, space frames, large-span curved and torsional steel roof members, primary and secondary steel structural joints
Why choose torsional shear bolts: Such projects impose extremely high demands on joint precision, seismic resistance and wind resistance; they involve a vast number of joints and are subject to rigorous supervision and acceptance procedures. Torsional shear bolts offer minimal variation in pre-tension, ensuring uniformity and stability; on-site acceptance is straightforward, thereby reducing disputes during supervisory re-inspections.
steel-framed residential buildings
Applications: Joints between steel frame beams and columns, steel bracing, and the steel structure of the outer frame surrounding the core wall
Why choose torsional shear bolts: Super-high-rise structures are significantly affected by wind and seismic loads, necessitating a high level of reliability in connections; as work is carried out at great heights, inspection is difficult; torsional shear bolts allow for visual acceptance testing, thereby mitigating the risks of under-tightening or missed tightening.
Transport infrastructure
Applications: steel box-girder joints, main girder connections, bridge deck systems, bearing connections
Why choose torsional shear bolts: Given the long-term cyclic vibrations from vehicles and high fatigue loads, torsional shear bolts offer stable preload and excellent fatigue resistance; as working space on-site on bridges is limited, their rapid tightening and quick inspection make them suitable for friction-type connections in steel bridge structures.
Our Strengths
We are a manufacturer, so there are no mark-ups from middlemen. We maintain full control over the entire production process—from raw material intake, heat treatment and phosphating to final product inspection—and each batch is accompanied by a test report, ensuring consistent quality. We offer a comprehensive range of specifications, with standard sizes from M16 to M30 in stock, whilst lengths and surface treatments can be customised. With ample production capacity, we guarantee reliable delivery for large orders and can accommodate urgent orders. Our technical and after-sales teams are available for direct consultation; please feel free to contact us at any time regarding technical issues, and we welcome requests for samples for testing.
When undertaking steel structure projects, the last thing you want is for fasteners to let you down. By sourcing directly from the manufacturer, you can ensure controllable quality, fair pricing and reliable supply. We look forward to establishing long-term partnerships with you all!