English 
Product Description
As a premier manufacturer and supplier of structural bridge components, we present the 200-Convex and Concave End Post. Engineered for rigorous infrastructure demands, these specialized connection units ensure flawless load transfer and structural integrity at truss endpoints.
Manufactured from premium high-strength steel for maximum fatigue resistance.
Precision-engineered tapered protrusions and recesses for rapid field assembly.
Hot-dip galvanized surface guarantees exceptional longevity in harsh environments.
Directly supplied by a certified manufacturer, ensuring rigorous quality control.
The 200-Convex and Concave End Post system serves as the critical mechanical junction for heavy-duty modular steel bridges. When handling these components, the sheer density and flawless craftsmanship of the cast steel become immediately apparent. The surface features a uniform, industrial-grade hot-dip galvanized finish, providing a smooth yet resilient tactile feel that acts as an impenetrable barrier against corrosive environmental elements. Visually, the precisely machined tapered protrusion of the convex post aligns with absolute geometric perfection into the matching recess of the concave post, creating a locking mechanism that is both aesthetically robust and structurally infallible.
Beyond their imposing physical presence, these end posts are meticulously designed to resolve complex engineering challenges. They act as the definitive end closures of the truss structure, effectively concentrating massive axial forces, tension, compression, and shear, then seamlessly transferring them down to the bridge bearings and abutments. By integrating these components into your infrastructure projects, construction teams can eliminate the structural vulnerabilities typically found at span junctions. The intelligent design absorbs micro-movements caused by concrete shrinkage, foundation settlement, or extreme temperature fluctuations, ensuring the overarching bridge framework remains stable, safe, and fully operational under the most punishing dynamic loads.
Understanding the exact technical parameters of your structural components is vital for ensuring project safety and compliance. The following specifications detail the precise measurements, material compositions, and mechanical tolerances of our 200-Convex and Concave End Posts. Every dimension, from the 64 kg weight of the convex post to the strict 1 to 3 mm fit clearance, has been rigorously calculated to provide optimal load-bearing capabilities. These parameters reflect our commitment to manufacturing excellence, ensuring that every unit delivered to your construction site meets the exact tolerances required for high-stress bridge engineering.
Parameter | Specification |
|---|---|
Product Name | 200-Convex And Concave End Post |
Compatible Bridge Type | SJ-200 / HD-200 Bailey Bridge |
Main Material | High-strength Q355B Steel / Cast Steel (e.g., ZG270-500) |
Surface Treatment | Hot-dip Galvanizing |
Convex End Post Dimensions | 176 225 2425 mm |
Convex End Post Weight | 64 kg |
Concave End Post Dimensions | 100 173 2425 mm |
Concave End Post Weight | 69 kg |
Fit Clearance | 1–3 mm |
Allowable Rotation Angle | ≤0.02 rad |
Pin Hole Process | Heat-treated for wear resistance |
Connection Method | Bolted or welded to Bailey chords |
Origin | Zhenjiang, Jiangsu, China |
Quality Certification | ISO9001, Material certificates, Test reports |
Our end posts are engineered to deliver unparalleled performance, directly addressing the core challenges faced by structural engineers and project managers during bridge construction and maintenance.
Precision Fit Interlocking: The meticulously calibrated 1 to 3 mm clearance between the convex and concave components eliminates joint play while allowing for rapid, frictionless insertion during time-sensitive erections.
Wear-Resistant Pin Holes: Subjected to advanced heat treatment processes, the pin holes exhibit extraordinary surface hardness, drastically reducing wear from continuous dynamic loading and extending the maintenance lifecycle.
Corrosion Immunity: Encased in a heavy-duty hot-dip galvanized coating, the steel core is completely shielded from moisture, salt, and chemical degradation, ensuring decades of reliable service in marine or high-humidity environments.
Stress Distribution Mastery: The structural geometry is optimized to funnel extreme shear and axial forces directly into the abutments, preventing localized fatigue and safeguarding the integrity of the entire truss system.
The foundation of any enduring infrastructure lies in the uncompromising quality of its raw materials. We utilize top-tier Q355B high-strength steel and premium ZG270-500 cast steel to forge these critical connection components. This material selection provides the ultimate balance of tensile strength and ductility, allowing the end posts to absorb massive impact loads without fracturing.
Heavy-Duty Casting: Utilizing ZG270-500 cast steel ensures that the complex geometries of the tapered protrusions are formed with zero internal voids, maximizing structural density.
Advanced Heat Treatment: The pin holes undergo a specialized thermal hardening process, creating a wear-resistant boundary layer that withstands the constant friction of locking pins.
Galvanized Armor: The hot-dip galvanizing process bonds zinc to the steel at a molecular level, creating a self-healing surface that resists scratching and environmental decay.
Strict Weight Tolerances: With the convex post weighing precisely 64 kg and the concave at 69 kg, the standardized mass ensures predictable load calculations for engineering teams.
Serving as the final, critical link in the load transfer chain, the convex and concave end posts are the unsung heroes of bridge stability. They are engineered to act as hinged joints in multi-span continuous arrangements, a design that brilliantly releases end moments and vastly simplifies structural analysis for engineering teams.
Rotational Flexibility: The hinged node design permits a controlled rotation of up to 0.02 rad, safely accommodating dynamic deflections caused by heavy vehicular traffic.
Longitudinal Movement Absorption: Effectively neutralizes structural stress induced by severe temperature variations, concrete creep, or unexpected foundation settlement.
Axial Force Concentration: Acts as a robust end closure, gathering dispersed tension and compression forces from the truss chords and channeling them safely into the bridge bearings.
Fatigue Resistance: The seamless transfer of shear forces prevents the accumulation of micro-fractures in the main bridge panels, ensuring long-term structural health.
Infrastructure projects rarely exist in perfectly controlled environments. Our end posts are designed to provide absolute adaptability across a vast spectrum of complex engineering scenarios, delivering secure connections wherever they are deployed.
Multi-Span Continuous Bridges: Facilitates the seamless inter-span connection of steel temporary bridges, creating unified, highly stable load-bearing systems.
Emergency & Disaster Relief: Enables the rapid mixing and matching of different batches of Bailey panels, crucial for restoring access in disaster-stricken zones.
Complex Curved Structures: Engineered to resist the severe additional lateral forces and torsional moments inherently present in curved bridge alignments.
Double-Deck Configurations: Perfectly suited for the ends of double-deck bridges, where upper and lower posts are installed independently but function cooperatively to distribute massive loads.
Permanent Bearing Nodes: Easily welded to base plates to serve as the permanent foundational nodes for long-term bridge installations.
Installation Method Recommendation
Time is the most expensive commodity on any construction site. The modular architecture of the convex and concave end posts is specifically tailored to accelerate erection schedules and minimize the reliance on highly specialized labor.
Intuitive Interlocking: The tapered male and female design allows for swift, self-aligning insertion, immediately secured by a standard locking pin.
Comprehensive SOPs: We provide detailed standard operating procedures, covering everything from assembling the 27-piece bilateral panels to hoisting the 11-ton combined truss units.
Strategic Crane Utilization: Clear guidelines on utilizing lorry-mounted cranes for optimal placement on abutments, ensuring maximum safety during the lifting phase.
Sequential Decking Strategy: Step-by-step instructions for installing transoms, sway bracing, and bridge decking to maintain structural equilibrium during the entire erection process.
On-Site Supervision: Access to comprehensive installation manuals, video guides, and optional on-site expert supervision to guarantee a flawless build.
Partnering with a direct manufacturer eliminates supply chain uncertainties. Located in Zhenjiang, Jiangsu, our state-of-the-art production base is exclusively dedicated to the fabrication of premium bridge components, ensuring consistent quality and uninterrupted supply for massive global projects.
Massive Production Capacity: With an annual output capability of 90,000 tons, we effortlessly fulfill the high-volume demands of international infrastructure developments.
ISO9001 Certified Excellence: Every stage of production, from raw steel smelting to final galvanization, is governed by strict ISO9001 quality management protocols.
Complete Traceability: Every end post is accompanied by comprehensive material certificates, rigorous test reports, and official quality assurance documentation.
Advanced Defect Testing: Regular, intensive inspections for wear and micro-cracks, particularly around the high-stress pin hole regions, ensure zero-defect deliveries.
We transcend the role of a mere component supplier by operating as your dedicated engineering partner. Our goal is to drastically reduce your project risks by providing end-to-end technical support and bespoke structural solutions tailored to your specific site requirements.
Free Structural Calculations: Our in-house engineering team provides precise load-bearing calculations to ensure your bridge design meets all safety thresholds.
Custom Blueprint Generation: We supply detailed, customized CAD drawings that seamlessly integrate our end posts into your unique architectural vision.
24/7 Technical Response: An elite after-sales service team remains on standby around the clock to resolve any on-site technical queries instantly.
Tailored Component Modification: Ability to adjust dimensions, material grades, or surface treatments to comply with specific regional regulations or extreme environmental conditions.
Selecting the right manufacturing partner is a critical decision that impacts the safety, budget, and timeline of your entire project. We bring decades of specialized metallurgical expertise and structural engineering prowess directly to your procurement strategy.
Direct Manufacturer Pricing: By eliminating intermediaries, we provide premium-grade structural steel components at highly competitive rates, optimizing your project budget.
Proven Global Track Record: Our components form the backbone of countless successful infrastructure projects worldwide, earning the trust of top-tier construction firms.
Unwavering Delivery Reliability: Our massive inventory and streamlined logistics network guarantee that your critical components arrive on-site precisely when needed.
Holistic Project Partnership: From the initial consultation and custom design phase to final on-site installation guidance, we are invested in the ultimate success of your construction endeavor.
We are a direct manufacturer headquartered in Zhenjiang, Jiangsu. We operate our own expansive production base and specialized assembly lines dedicated exclusively to the fabrication of premium structural bridge components and accessories.
Our manufacturing processes are fully ISO9001 certified, and all products strictly adhere to national and international engineering standards. We provide comprehensive documentation with every shipment, including detailed material certificates, rigorous mechanical test reports, and official quality certificates.
Absolutely. We offer extensive customization services to meet unique project demands. Our engineering department provides free, highly accurate structural calculations and bespoke CAD drawings to ensure our components integrate flawlessly into your specific bridge architecture.
We supply an extensive suite of installation resources, including detailed blueprints, comprehensive operational manuals, and step-by-step video guides. For highly complex erections, we offer professional on-site supervision and maintain a 24-hour rapid-response technical support team.
We strongly advise assigning an experienced construction team to manage the erection. Based on typical spacious and flat site conditions, the procedure begins by assembling the bilateral panels into two complete truss units—incorporating the lower chord reinforcements, horizontal and vertical bracing, and the convex/concave end posts. Always verify the length of the assembled truss against the abutment bolt distances before utilizing a suitable lorry-mounted crane for the final lift.
