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Product Description
As a leading manufacturer and supplier of heavy-duty infrastructure components, we introduce the 200-Fish-Bellied Beam For Long-Span Steel Bridges. Engineered for exceptional load-bearing capacity without intermediate supports, this variable-depth beam optimizes material distribution to match bending moment envelopes perfectly.
Direct supply from specialized manufacturing facilities.
Engineered for single spans exceeding 30 meters.
Reduces structural self-weight while saving 20% to 30% on steel usage.
Ideal for complex terrains, soft ground, and heavy-load temporary or permanent crossings.
The 200-Fish-Bellied Beam represents a pinnacle in structural engineering, presenting a variable-depth truss or solid web configuration where the bottom flange curves gracefully in a quadratic parabola or catenary arc. Visually, the structure mimics the sleek, hydrodynamic underbelly of a fish, a design that is not merely aesthetic but deeply functional. When you observe the robust steel plates or meticulously aligned lower chord nodes, you are looking at a masterclass in material efficiency. The depth reaches its maximum exactly at the midspan where the bending moment is most intense, and smoothly tapers toward the ends where shear forces dominate but bending moments recede. This intelligent distribution of mass gives the beam a commanding, rigid presence while significantly reducing its overall self-weight.
Touching the cold, precision-welded steel surfaces reveals the rigorous craftsmanship that goes into every component. Whether navigating deep valleys, traversing navigable rivers, or establishing vital infrastructure over soft, unforgiving ground, this beam eliminates the absolute necessity for intermediate piers. It delivers an unparalleled bending capacity and stiffness compared to standard constant-depth alternatives. The smooth, curved lines not only provide a striking silhouette for urban landscape bridges but also ensure that foundational bearing requirements are kept to an absolute minimum. Every inch of this structure speaks to durability, safety, and a profound understanding of applied mechanics, transforming raw steel into a highly efficient, load-conquering pathway.
The technical parameters of the 200-Fish-Bellied Beam are rigorously calculated to ensure maximum structural integrity and operational safety across demanding environments. Below is the detailed specification matrix outlining the core engineering data.
Product Name | 200-Fish-Bellied Beam For Long-Span Steel Bridges |
|---|---|
Beam Type | Variable-depth truss or solid web beam |
Bottom Curve Shape | Quadratic parabola or catenary |
Rise-to-span Ratio | 1/8 - 1/12 |
Deflection Control | L/400 - L/500 |
Material Saving Rate | 20% - 30% |
Applicable Span | Single span > 30m |
Single Truss Unit Reference Length | 27.4m (based on assembly example) |
Single Truss Unit Reference Weight | Approx. 11 tons (based on assembly example) |
Transom Single Piece Weight | ≤ 1 ton |
Core Components | Bailey panels (27 pieces per unit), reinforced upper/lower chords, horizontal/vertical bracings, transoms, deck panels, bridge bearings, etc. |
Quality Certification | ISO9001, meets national standards, material certificates & test reports provided |
Origin / Enterprise Type | Zhenjiang, Jiangsu, China / Direct source manufacturer |
Engineered to conquer the most challenging structural demands, this fish-bellied beam translates advanced mechanical theories into tangible, on-site advantages. By choosing this variable-depth architecture, project developers can drastically cut down on foundational groundwork and material expenditures.
Optimized Material Efficiency: By matching the beam depth distribution directly to the bending moment envelope, the design actively reduces unnecessary mass, saving 20% to 30% in steel usage without compromising structural integrity.
Superior Spanning Capability: Designed specifically for scenarios where intermediate piers are impossible, granting the ability to effortlessly clear single spans greater than 30 meters over deep valleys or active railways.
Reduced Foundation Burden: The inherent reduction in self-weight makes this beam the ultimate solution for soft ground installations, significantly lowering the bearing capacity requirements for abutments and foundations.
Aesthetic and Functional Synergy: The graceful parabolic or catenary curve provides an elegant visual signature, making it highly sought after for urban landscape bridges and tourist resort walkways where harmony with the environment is paramount.
Enhanced Stiffness and Bending Capacity: Outperforms constant-depth beams of the same span by delivering concentrated strength exactly where the load demands it most, preventing sagging and ensuring long-term stability under heavy traffic.
Installation Method Recommendation
To fully understand the value this structural component brings to large-scale infrastructure projects, we must evaluate its performance across multiple critical dimensions. From mechanical efficiency to on-site execution, every aspect is optimized for high-stakes engineering.
The core advantage lies in the perfect alignment of the variable-depth design with the bending moment envelope. This strategic geometry delivers higher bending capacity and rigidity while shedding dead weight, directly addressing the dual demand for cost-effective procurement and uncompromising performance.
Strict rise-to-span ratios maintained between 1/8 and 1/12 ensure optimal load distribution.
Deflection is meticulously controlled within the L/400 to L/500 range to preserve the precise curve shape under dynamic loads.
Advanced curve control utilizing quadratic parabola or catenary profiles guarantees engineering exactitude for professional bridge architects.
This system thrives where traditional bridging fails. It is the definitive choice for crossing navigable rivers, deep valleys, and active highways without intermediate supports. Its adaptability shines in disaster relief operations with limited materials, heavy-load construction trestles, permanent medium-span bridges, and even bridge jacking rehabilitation projects.
Modular assembly utilizing standard bailey panels (27 pieces per main unit) streamlines site logistics.
Manageable component weights, with single truss units at approximately 11 tons and transoms under 1 ton, allowing for efficient lifting with standard lorry-mounted cranes.
Comprehensive support including detailed drawings, manuals, instructional videos, and available on-site supervision ensures flawless execution by experienced construction teams.
Sourced directly from a premier manufacturing base in Zhenjiang, Jiangsu, every component is backed by robust production lines. Adherence to ISO9001 certifications and stringent national standards is non-negotiable, with full material certificates, test reports, and quality assurance documents provided for complete procurement confidence.
Complimentary structural calculations tailored to specific site topography and load requirements.
Customized drawing generation to seamlessly integrate the beam into unique project blueprints.
End-to-end technical solutions that transform non-standard engineering challenges into executable, safe, and efficient realities.
Selecting the right structural partner is as critical as the engineering itself. We do not just supply steel; we deliver certainty, safety, and economic efficiency for your most demanding infrastructure projects.
Direct Source Advantage: Operating out of our dedicated production base in Zhenjiang, Jiangsu, we eliminate intermediaries, ensuring you receive premium, strictly controlled components directly from the manufacturing floor.
Uncompromising Quality Assurance: Every single pin, bolt, and reinforced chord undergoes rigorous testing. Our ISO9001 certification and comprehensive material testing reports mean you never have to second-guess the integrity of your bridge.
Holistic Project Support: From the initial free structural calculations to the final installation of handrail columns, our engineering team stands by your side. We provide 24-hour after-sales service to keep your project moving forward without delay.
Proven Installation Methodologies: We do not leave you guessing on-site. By analyzing your specific erection site drawings, we provide step-by-step, optimized installation procedures—from assembling the 27-piece bilateral bailey panels to the precise placement of bridge bearings.
Customized Engineering Solutions: Recognizing that no two deep valleys or soft-ground sites are identical, our design team excels in adapting our variable-depth truss systems to meet your exact topographical and load-bearing realities.
To assist procurement managers and site engineers in their decision-making process, we have compiled detailed answers to the most critical inquiries regarding our variable-depth bridge systems.
We are a direct manufacturer located in Zhenjiang, Jiangsu. We operate our own extensive production base and specialized manufacturing lines dedicated entirely to heavy-duty bridge components and variable-depth beams, ensuring direct oversight of every fabrication step.
Our comprehensive product ecosystem includes the SJ-200 Steel Bridge, SJ-321 Bailey Bridge systems, standard bailey panels, reinforced upper and lower chords, horizontal and vertical bracing frames, deck panels, transoms, bridge bearings, pins, bolts, and a full suite of connecting steel components.
Absolutely. We specialize in bespoke engineering. Our technical team provides complimentary structure calculations, detailed CAD drawings, and full customization services to ensure the fish-bellied beam precisely matches your project's unique bending moment and shear force requirements.
Quality and traceability are paramount. Our facilities are ISO9001 certified, and all products strictly comply with national engineering standards. Upon delivery, we provide comprehensive material certificates, independent test reports, and official quality certificates for your compliance records.
We offer robust installation guidance tailored to your specific site. This includes detailed erection drawings, comprehensive manuals, and instructional videos. For complex scenarios, such as lifting the 11.ton combined truss units or sequencing the transom installations, on-site supervision is available alongside our dedicated 24-hour after-sales technical support.
The precise quadratic parabola or catenary curve is achieved through meticulous fabrication, often utilizing pre-bent members or highly accurate straight-segment approximations. During operation, strict deflection control parameters (L/400 to L/500) are engineered into the structure to preserve the geometric integrity and load-transfer efficiency of the curved segments.
