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Product Description
As a premier manufacturer and direct supplier of heavy-duty infrastructure components, we engineer the 321-Double Bridge Bearing to deliver uncompromising stability for large-scale structural projects. Designed to support massive vertical loads and mitigate eccentric stress, this assembly is indispensable for complex engineering environments and demanding terrain conditions.
Engineered for high-capacity vertical load distribution and structural safety
Precision-machined for seamless integration with standard bridge panels
Manufactured from high-strength steel for extreme durability in harsh environments
The 321-Double Bridge Bearing stands as the critical foundation for heavy-load steel temporary bridges, translating raw structural weight into stabilized, safely distributed forces. When handling the immense downward pressures of crawler cranes, main battle tanks, or heavy transportation vehicles, standard single bearings often fall short. This double-bearing assembly solves that structural bottleneck by placing two robust bearing units side by side, either sharing a heavy-duty common base plate or connected via a reinforced link plate. The immediate result is a drastic reduction in compressive stress on pier concrete, safeguarding the integrity of your entire substructure and preventing catastrophic foundation failure.
Running a hand along the cold, industrial-grade steel surface reveals a precision-machined finish, a testament to the meticulous fabrication process required for heavy infrastructure. The solid metallic resonance of the high-strength structural steel speaks to its capability to withstand relentless, high-frequency dynamic loads without structural fatigue. By allowing each individual bearing to accommodate different rotational angles and microscopic settlements independently, this system actively prevents voiding and uneven load sharing. Whether you are constructing a wide-deck overpass or a heavy construction trestle, this bearing assembly ensures that concentrated reactions are safely diffused, providing structural engineers and project managers with absolute confidence in their bridging infrastructure.
Specification Criteria | Technical Details |
|---|---|
Product Name | 321-Double Bridge Bearing |
Vertical Load Capacity | 500–1500 kN or higher |
Center-to-Center Distance | 450 mm, 900 mm, or 1350 mm (Matches standard Bailey panel row spacing) |
Bearing Height | 150–300 mm |
Top Surface Level Difference | ≤1 mm |
Applicable Bridge Deck Width | ≥6 m |
Applicable Bridge Span | ≥20 m |
Main Material | High-strength structural steel (e.g., Q345) |
Structural Form | Cast as a single steel unit, or fabricated by welding two individual bearings onto a common base plate |
Displacement / Rotation Configuration | One fixed and one movable, or both movable |
Quality Certification | ISO9001 |
Our bearing systems are engineered to resolve the most demanding challenges in modern bridge construction, offering unparalleled mechanical advantages that directly translate to project safety, rapid deployment, and structural longevity.
Eccentric Load Resistance: Dramatically increases lateral stability, effectively neutralizing overturning moments caused by off-center heavy vehicle traffic.
Independent Articulation: Allows each single bearing to accommodate different rotational angles and settlements independently, ensuring continuous surface contact.
Uniform Stress Distribution: In bridge decks exceeding 6 meters in width, the system supports left and right Bailey panels separately, preventing localized structural fatigue.
Uplift Mitigation: Offers superior uplift resistance, making it an essential component for temporary bridges located in active seismic zones or high-wind areas.
Understanding the rigorous demands of large-scale infrastructure procurement, our double bearing systems are categorized by their specific engineering triumphs, ensuring they meet the exact criteria of complex structural deployments globally.
Designed specifically for large-tonnage heavy-load applications, this bearing system easily manages the extreme forces exerted by 100-ton girder carriers, 60-80 ton main battle tanks, and heavy crawler cranes. By delivering a vertical load capacity exceeding 500-1500 kN, it effectively disperses concentrated reactions. This provides a critical layer of safety redundancy for high-risk engineering feats, such as overpass bridges crossing active railways or highways.
Engineered for deck widths of 6 meters and spans over 20 meters.
Neutralizes lateral moments generated by centrifugal forces on curved bridge sections.
Prevents pier concrete degradation through massive footprint distribution.
Fabricated from premium high-strength structural steel, such as Q345, every component is forged to endure severe environmental and mechanical stress. The manufacturing process offers flexibility, providing either a seamlessly cast single unit or two individual bearings meticulously welded to a heavy-duty common base plate. The strict tolerance control ensures the top surface level difference remains strictly at or below 1 mm.
Eliminates voiding phenomena through micro-precision leveling.
Enhances the fatigue resistance of the entire bridge superstructure.
Reinforced connecting components guarantee long-term structural integrity under dynamic loads.
The center-to-center distances of 450 mm, 900 mm, and 1350 mm are not arbitrary; they are precisely calibrated to match the standard row spacing of 321-type Bailey panels. This modular synergy accelerates the assembly process. Furthermore, the dual-bearing architecture excels in unpredictable terrains, allowing independent adaptation to uneven foundation settlements.
Maintains structural equilibrium in complex, shifting geological conditions.
Perfectly adaptable for seismic zone deployments requiring flexible, independent articulation.
Procurement teams require absolute certainty, which is why our production lines operate under strict ISO9001 quality management systems. Every bearing assembly complies with rigorous national and international steel bridge standards. We ensure that static and dynamic load testing protocols are strictly adhered to, guaranteeing absolute reliability under extreme working conditions.
Comprehensive material certificates provided with every shipment.
Detailed test reports available for structural engineering auditing.
Official quality certificates ensure compliance for government and military contracts.
The versatility of the 321-Double Bridge Bearing extends far beyond standard temporary steel bridges. Its robust construction makes it the optimal choice for a wide array of demanding infrastructural applications, acting as the crucial load-bearing nexus.
Heavy construction trestles supporting crawler cranes and pile drivers.
Military heavy assault bridges requiring rapid deployment and extreme load tolerance.
Port and wharf temporary bridges subjected to high-frequency heavy container trailer traffic.
Serving as reliable jacking support points for bridge jacking and temporary support works.
Permanent Bailey bridge bearing systems requiring enhanced durability and lifespan.
Installation Method Recommendation
We provide a comprehensive, turnkey approach to structural support. From the initial planning phases to final execution, our engineering team supplies free structural calculations, customized design drawings, and tailored configurations. During the erection phase, we supply detailed manuals, instructional videos, and optional on-site supervision by experienced engineers.
24-hour rapid response after-sales service for on-site troubleshooting.
Clear procedural guidance for lorry-mounted crane lifting and precise positioning.
Strategic advice on transom and sway bracing installation to maximize erection stability.
Sourcing critical infrastructure components requires a partner with a proven track record in manufacturing excellence and logistical precision. Operating directly from our specialized production base in Zhenjiang, Jiangsu, we control every aspect of the fabrication process to ensure zero defects.
Direct Manufacturer Advantage: Eliminating intermediaries ensures stringent quality oversight and highly competitive project pricing for large-scale developments.
Specialized Production Lines: Our facilities are exclusively dedicated to steel bridges, Bailey panels, and full-set steel components, ensuring unmatched domain expertise.
Custom Engineering Solutions: We do not just supply parts; we provide comprehensive structural calculations and customized designs tailored to your specific site topography and load requirements.
Global Compliance: With ISO9001 certification and adherence to rigorous national standards, our products are ready for immediate integration into international public works.
Review our most common inquiries regarding technical specifications, procurement, and installation procedures for our heavy-duty bridge bearings.
We operate strictly as a direct manufacturer based in Zhenjiang, Jiangsu. We possess our own advanced production base and dedicated manufacturing lines specialized in steel bridges, Bailey panels, and associated structural parts, ensuring full control over quality and production lead times.
Our core manufacturing focuses on heavy-duty infrastructure, primarily including SJ-200 Steel Bridges, SJ-321 Bailey Bridges, Bailey panels, chords, frames, deck panels, pins, bolts, and a complete suite of steel bridge components designed for high-capacity load bearing.
Absolutely. We understand that every installation site presents unique engineering challenges. We offer complimentary structural calculations, detailed engineering drawings, and complete customization services to ensure our bearings and bridge components perfectly align with your project's mechanical requirements.
Our manufacturing processes are fully ISO9001 certified, and all products strictly meet national structural standards. Upon delivery, we provide comprehensive material certificates, rigorous test reports, and official quality certificates to satisfy your project's compliance and structural auditing requirements.
We provide extensive installation support, including detailed CAD drawings, comprehensive manuals, and instructional videos. For complex erections, we offer on-site supervision by our senior engineers. Our recommended procedure involves assembling bilateral Bailey panels, installing bearings on abutments, and utilizing suitable lorry-mounted cranes (e.g., for 11-ton, 27.4m combined truss units) to ensure safe, methodical placement of transoms and sway bracing. We also maintain a dedicated 24-hour after-sales service channel to assist your construction team.
