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Product Description
As a premier manufacturer and global supplier of structural bridge components, we engineer the High-Strength Bailey Pin to serve as the critical fastening core for rapid truss assembly. Crafted for heavy-duty load transfer, these pins guarantee steadfast stability in demanding engineering environments.
Engineered from premium alloy steel for superior shear capacity and impact resistance.
Precision-machined to exact tolerances for seamless, tool-free manual insertion.
Treated with advanced anti-corrosion coatings to ensure maximum longevity in harsh climates.
Direct-from-manufacturer sourcing guarantees unparalleled cost-efficiency and consistent quality control.
The High-Strength Bailey Pin stands as the quintessential fastening device engineered to unite truss panels with uncompromising structural integrity. When handling these pins on-site, the substantial weight and smooth, cold metallic finish immediately convey the rigorous forging and meticulous heat-treatment processes they undergo. Each pin is expertly crafted to slide seamlessly into interlocking male and female panel holes, producing a satisfying, precise fit that eliminates the need for heavy machinery or specialized tools during critical bridge erection phases. By serving as the primary hinge connection, these robust pins flawlessly transmit immense shear forces across the entire bridge framework, ensuring that heavy vehicular traffic and dynamic structural loads are distributed evenly and safely across the span.
Beyond mere connection, this critical fastener acts as the lifeline of modular bridge systems, actively accommodating subtle environmental shifts. The intelligently designed fit clearance permits a microscopic degree of rotation, absorbing the stress of extreme temperature fluctuations and natural foundation settlement without compromising the overall rigidity of the bridge. With a chamfered tip guiding the initial insertion and a precisely milled groove securing the retaining ring, construction crews experience a frictionless, highly intuitive assembly process. This thoughtful engineering transforms labor-intensive bridge building into a streamlined, highly predictable operation, ultimately saving valuable time and labor resources on remote, demanding, or emergency job sites.
Specification Parameter | Technical Details |
|---|---|
Material | High-strength alloy steel (40Cr, 35CrMo, 42CrMo) |
Standard Diameter | 49.5 mm / 50 mm |
Length Range | 200 mm - 400 mm (customized based on connection needs) |
Surface Hardness | HRC 32–38 (quenched and tempered, tough core) |
Surface Treatment | Galvanizing or Dacromet |
Shear Capacity | Up to several hundred kN |
Fit Clearance | 0.3 mm - 1.0 mm |
Fatigue Life | 2 million load cycles |
Max Rotation | ≤0.02 rad (accommodates temperature changes and foundation settlement) |
Wear Limit | Mandatory discard if diameter reduction > 0.5 mm |
Locking Design | Chamfered on one end for insertion, grooved on the other for a ring lock to prevent withdrawal |
Our Bailey pins are engineered to redefine operational efficiency and structural reliability for large-scale bridge deployment. By focusing on the exact technical requirements of rapid infrastructure development, we deliver a fastening solution that consistently outperforms standard market alternatives.
Tool-Free Rapid Deployment: The ergonomic chamfered tip allows field operators to intuitively align and insert the pin manually, drastically cutting down erection time during critical infrastructure projects.
Fail-Safe Locking Mechanism: A deeply milled end groove perfectly accommodates a high-tension ring lock, providing an audible and visual confirmation that the pin is permanently secured against vibration-induced withdrawal.
Dynamic Stress Absorption: Engineered to allow a micro-rotation of ≤0.02 rad, the pin acts as a mechanical shock absorber, gracefully handling the natural expansion, contraction, and settling of the bridge foundation.
Exceptional Core Toughness: Through a specialized quenching and tempering process, the pin achieves a formidable surface hardness while maintaining a ductile core, preventing catastrophic brittle fractures under sudden impact loads.
When sourcing load-bearing fasteners for critical infrastructure, safety and uncompromising strength are paramount. Our Bailey pins are forged from top-tier high-strength alloy steels, specifically 40Cr, 35CrMo, and 42CrMo, ensuring they meet the rigorous demands of heavy-duty engineering and continuous stress.
Massive Shear Resistance: Designed to withstand extreme shear forces reaching several hundred kilonewtons, these pins maintain the absolute structural integrity of the entire truss system under heavy vehicular or equipment loads.
Optimized Hardness Profile: A precise heat-treatment regimen results in a surface hardness of HRC 32–38. This creates a highly wear-resistant outer shell combined with a remarkably tough internal core, effectively resisting both abrasion and sudden impact.
Extended Fatigue Endurance: Rigorously tested in controlled laboratory environments to endure up to 2 million continuous load cycles, these fasteners guarantee long-term stability, eliminating the risk of premature mechanical failure in high-traffic permanent bridges.
Bridge components are perpetually subjected to harsh outdoor elements, from torrential rains to corrosive marine environments. To combat environmental degradation, our pins bypass standard blackening processes in favor of advanced, highly durable protective coatings.
Premium Galvanization: A thick, uniform layer of zinc coating acts as a robust sacrificial barrier, preventing moisture and oxygen from reaching the alloy steel core, thereby halting rust formation in its tracks.
Advanced Dacromet Technology: For the most unforgiving environments, our Dacromet coating offers superior passivation and cathodic protection, delivering exceptional resistance to salt spray, humidity, and chemical corrosion.
Reduced Maintenance Overheads: By significantly extending the lifespan of each pin in damp or corrosive conditions, these protective finishes lower the frequency of component replacement, driving down the long-term maintenance costs for permanent bridge installations.
Construction teams operating on tight schedules require components that fit perfectly on the first attempt without forced adjustments. We manufacture our Bailey pins with exacting dimensional tolerances to guarantee seamless interoperability with standard structural panels.
Micrometer-Level Fit Clearance: Controlled strictly between 0.3 mm and 1.0 mm, the clearance between the pin and the panel hole strikes the perfect balance—loose enough for smooth manual insertion, yet tight enough to prevent structural rattling under load.
Universal Compatibility: Precisely dimensioned at 49.5 mm or 50 mm in diameter, these pins are flawlessly tailored to integrate with standard SJ-200 and SJ-321 Bailey panels without the need for on-site modifications or re-drilling.
Accelerated Emergency Erection: The combination of the chamfered leading edge and the secure ring-lock groove empowers crews to perform "zero-tool" assembly. This intuitive design is crucial for shaving hours off the construction timeline during time-sensitive emergency rescue operations.
Installation Method Recommendation
First of all, an experienced construction team should be assigned to undertake the erection of the bridge.
We have studied the drawings of the erection site and surrounding area, and conclude that the installation site is spacious and flat,so we recommend the installation procedure as follows:
Assemble the bilateral bailey panels to two whole construction, including the lower chord reinforced、horizontal bracing、vertical bracing、male and female end post. every assembling unit is mainly composed by 27 pieces of bailey panel
Meanwhile, the bridge bearings are installed on the abutment. note that：check the length of the single whole bailey truss and the distance between the bolts of the two side of the river, if not fit , adjust the bolts.
Use suitable lorry-mounted crane to lift the two assembling truss unit and place them on the two side abutments.the single combined truss unit is weight about 11tons and 27.4 m length.
Install the transom, please refer the video.for the weight of one piece of transom is about not more than 1 ton，so it need a small crane. In order to increase the stability of the structure during the erection, the nearest transom and the farthest transom, as far as possible according to the capacity of the crane, should be installed first, then for other transoms between them.
Install the sway bracing，then pave the first row in width direction of bridge decking on the transoms, including the side and middle bridge decking.
Meanwhile, install the upper chord reinforced to strengthen the structure,then the crane could move onto the bridge decking to install the following ahead transoms,similar ways like upper procedure to be perform.
The rest can be done in the same manner.
Final, install the upper chord reinforced、curb、gap plate、handrail、 connective plate and handrail column.
The true value of our fastening system lies in its unparalleled adaptability across a vast spectrum of engineering challenges. Whether establishing temporary emergency access or building permanent heavy-duty thoroughfares, these pins provide the vital linkage.
Multi-Row and Multi-Layer Configurations: We supply extended pins ranging from 200 mm to 400 mm, specifically designed to pass seamlessly through overlapping pin holes, enabling integral force transfer in complex double-deck bridge setups.
Rapid Military and Rescue Deployment: Engineered for hand-quick insertion and extraction, these fasteners are the preferred choice for military assault bridges and disaster relief pathways where speed dictates the success of the mission.
Efficient Bridge Dismantling: The smooth cylindrical surface and highly accessible locking mechanism mean that pulling the pins is just as fast as inserting them, facilitating the rapid disassembly, transport, and reconfiguration of modular bridge units.
Procuring structural components requires absolute confidence in manufacturing compliance and material traceability. We uphold the highest echelons of quality assurance to ensure every fastener performs exactly as engineered under extreme conditions.
Internationally Recognized Standards: Our production facilities operate under strict ISO9001 certification, guaranteeing that every batch of pins meets or exceeds rigorous national and international bridge engineering standards.
Comprehensive Documentation: Every shipment is accompanied by complete material certificates, detailed metallurgical test reports, and official quality assurance documents, providing total transparency for your project's engineering audits.
Scientific Maintenance Protocols: We establish clear, non-negotiable safety thresholds, mandating the immediate discard of any pin exhibiting a diameter reduction exceeding 0.5 mm. This strict wear limit underscores our commitment to unwavering structural safety and responsible life-cycle management.
Partnering directly with a premier manufacturing facility in Zhenjiang, Jiangsu, unlocks significant strategic advantages for large-scale procurement. We deliver not just physical components, but a comprehensive suite of engineering support services tailored to your project.
Direct-from-Manufacturer Pricing: By eliminating intermediaries, we provide highly competitive pricing structures for large-scale infrastructure projects, maximizing your procurement budget without compromising on material quality.
Complimentary Engineering Services: Our in-house engineering team provides free structural calculations and customized CAD drawings, ensuring the pin dimensions and material specifications perfectly align with your unique project requirements.
End-to-End Project Assistance: We back our products with exhaustive installation guides, detailed manuals, and instructional videos. For complex erections, we offer expert on-site supervision and a dedicated 24-hour response team to resolve any technical challenges instantly.
Selecting the right manufacturer for critical bridge components is a decision that impacts the safety, timeline, and financial success of your entire project. We have built our global reputation on a foundation of metallurgical expertise and unwavering client support.
Unmatched Production Capacity: Our dedicated production base features specialized lines exclusively for modular bridge components, ensuring we can fulfill high-volume orders with rapid, predictable turnaround times.
Decades of Specialized Expertise: With years of focused experience in structural steel fabrication, our technical team deeply understands the precise load dynamics and environmental stresses your projects will inevitably face.
Tailored Supply Chain Solutions: We maintain a strategic inventory of spare parts, allowing us to rapidly dispatch replacement pins (typically stocked at 10% of active use volume) to keep your operations running smoothly without interruption.
Commitment to Project Success: From the initial structural consultation to the final bridge dismantling, our comprehensive service ecosystem is designed to streamline your workflow, mitigate risks, and elevate the overall quality of your infrastructure developments.
Our precision-engineered pins are universally compatible with standard modular steel bridge frameworks, specifically the widely utilized SJ-200 and SJ-321 systems. They seamlessly integrate with standard panels, chords, frames, and end posts, ensuring a perfect fit for both longitudinal splicing and transverse combinations without requiring modifications.
Every production batch undergoes rigorous mechanical testing in our advanced in-house laboratory. We perform destructive shear tests and simulated fatigue cycling up to 2 million loads to verify that the alloy steel (40Cr, 35CrMo, or 42CrMo) meets the required structural thresholds. Full test reports are provided with your shipment for complete transparency.
Absolutely. While our standard diameters are 49.5 mm and 50 mm, and lengths range from 200 mm to 400 mm, our engineering department provides free structural calculations and custom drawings. We can machine pins to your exact dimensional specifications to accommodate unique multi-layer or multi-row panel connections.
For temporary or reusable bridge structures, we mandate a strict wear measurement protocol after every deployment. Using precision calipers, the cylindrical surface must be measured. If the diameter reduction exceeds the 0.5 mm wear limit, the pin must be permanently discarded to maintain the safety and integrity of future bridge assemblies.
We supply a comprehensive suite of instructional materials, including detailed schematic drawings, step-by-step manuals, and visual video guides. For highly complex or large-scale erections, we can dispatch experienced supervisors to your site to oversee the assembly process, backed by our round-the-clock technical support team to ensure a flawless installation.
