HSB (High-Rotation Separable Spherical Bearing for Railways)

The HSB (High-Rotation Separable Spherical Bearing) is a high-performance structural bearing installed between the upper and lower structures of a bridge. It is designed to efficiently transfer superstructure loads while accommodating multidirectional rotations and horizontal displacements, significantly enhancing the durability and structural stability of the bridge.
Engineered with specialized, patented technology, the HSB features an advanced "Rotational Uplift Control Wedge System" (Patent No. 10-1667695), which effectively controls and mitigates vertical uplift forces generated during earthquakes or abnormal structural behavior. This makes it an optimized seismic isolation and mitigation solution for modern transportation infrastructure.

* Impact and Damage Prevention

It effectively absorbs dynamic impacts and structural stresses transmitted from heavy rail traffic, preventing localized fatigue and premature damage to both the bridge superstructure and pier seats.

* High-Rotation and Low-Friction Performance

Utilizing premium low-friction materials and a highly engineered spherical sliding surface, the bearing allows smooth, high-capacity rotational movement with minimal resistance, minimizing secondary stresses on the bridge elements.

* Superior Structural Stability

The separable (detachable) design ensures exceptional structural load path integrity while offering outstanding feasibility for long-term maintenance, inspection, and partial component replacement without complete structural disruption.

* Excellent Seismic Response and Resilience

It delivers superior energy dissipation and displacement control capabilities during seismic events, protecting the entire bridge network from catastrophic failures and ensuring post-earthquake operational continuity.

- Rotational Uplift Control Wedge System (Patent No. 10-1667695)

Unlike conventional bearings that are vulnerable to vertical separation under complex dynamic loads, the HSB integrates a state-of-the-art rotational wedge mechanism.

This patented technology precisely counteracts and stabilizes negative reaction forces (uplift) during extreme events, ensuring that the bearing remains securely engaged and functional even under severe multi-axis load combinations.

- Railway and High-Speed Rail Bridges: Highly optimized for railway structures subjected to frequent, heavy cyclic loading and significant dynamic uplift forces.

- Long-Span and Curved Bridges: Ideal for long-span, cable-stayed, or complex curved bridges that demand high-capacity rotational performance and multi-directional displacement control.

- Seismic-Prone Infrastructure: Essential for critical bridge nodes requiring advanced seismic isolation and high reliability against unpredictable environmental loads.

[Keywords] Bridge Bearing, Spherical Bearing, Railway Infrastructure, Seismic Isolation, Uplift Control, Structural Engineering, HSB

Kwang Won Industrial Co., Ltd. is a leading South Korean manufacturer of high-performance bridge bearings, expansion joints, and noise barrier systems since 1986.
Certified under ISO 9001 and KS, we supply advanced seismic isolation and structural solutions―including LRB and POT bearings―tailored for global infrastructure projects.
Designated as a G-PASS company, we meet rigorous international standards, delivering proven engineering excellence for global highway and railway markets.