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AASHTO LRFD20 Certified Box Girder Steel Bridge with AWS D1.5M Standard Welding Process
| Place of Origin | China |
|---|---|
| Brand Name | FASEC |
| Certification | ISO 9001; EN 1090-1 FPC; CE; AWS CWI; AISC IBR/ABR |
| Model Number | Steel Girder Bridge |
| Minimum Order Quantity | 100 MT |
| Price | USD 1,000-1,500/MT |
| Packaging Details | Sea Freight (Container/Bulk Vessel) |
| Delivery Time | 30-60 Days |
| Payment Terms | L/C, D/A, D/P, T/T |
| Supply Ability | 5,000-15,000 MT/Year |
Product Details
| Design Standard | AASHTO LRFD20 | Welding Standard | AWS D1.5M |
|---|---|---|---|
| Deck Type | Orthotropic Steel Deck / Concrete Composite Deck | Corrosion Protection | Hot-dip Galvanizing (ASTM A123), Epoxy Coating, Weathering Steel |
| Field Connection | ASTM A325/A490 High-strength Bolts / AWS D1.5M Field Welding | NDT Inspection | 100% UT For FCM Welds; MT/PT As Required |
| Customization | Customized To Project Requirements (span, Width, Load, Site Conditions) | Applications | Highway Reconstruction, Railway Crossings, Municipal Engineering, Curved Bridges, Industrial Infrastructure |
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| NDT Inspection |
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Product Description
This AASHTO LRFD20 Certified Box Girder Steel Bridge with AWS D1.5M Standard Welding Process is a full shop-fabricated steel bridge superstructure solution. Engineered for high-standard global infrastructure projects, it combines AASHTO LRFD20 load resistance design principles with AWS D1.5M standardized welding technology.
All units are custom engineered according to actual span, width, load rating and environmental requirements. It features stable structural performance, excellent fatigue resistance and rapid on-site assembly, effectively balancing construction efficiency, structural safety and long-term economic benefits.
Dual Certification – AASHTO LRFD20 & AWS D1.5M
We strictly implement two core international bridge engineering standards to ensure overall project safety and compliance:
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AASHTO LRFD20
Adopts professional Load and Resistance Factor Design methodology. All flanges, webs, stiffeners and diaphragms are precisely calculated to resist HL-93 live load, fatigue load, temperature deformation and seismic load. Fracture-critical member (FCM) design specifications are strictly followed, and matching shear connectors ensure full composite action between steel girder and concrete deck. -
AWS D1.5M
Standardizes the full set of bridge welding procedures, welder qualification and inspection standards. Clause 12 regulates enhanced NDT requirements for fracture-critical welds, implementing 100% ultrasonic testing (UT). All production processes are supervised by AWS Certified Welding Inspectors (CWI). Different from ordinary AWS D1.1 structural welding standards, it meets stricter bridge fatigue and fracture resistance requirements.
Dual standard certification ensures global project compliance, controllable quality and low engineering risk.
Engineering Performance Advantages
Compared with traditional I-girder and plate girder bridges, our box girder bridge has obvious mechanical and engineering advantages:
- Excellent Torsional Rigidity: Closed box section effectively resists torsion force, perfectly applicable for curved bridges, skew supports and eccentric load scenarios.
- High Lateral Stability: Greatly reduces temporary bracing demand during construction and improves overall wind and seismic resistance.
- Flexible Span Design: Girder height ranges from 0.8m to 3.5m; single span reaches 6m–50m, continuous span supports up to 8 spans for diverse road layouts.
- Superior Fatigue Resistance: Optimized welding details and stress transition structure withstand millions of cyclic loads, supporting 75–100 years long design life.
- High Material Utilization: Adopts ASTM A709 50W / HPS 70W high-performance steel, realizing high strength with light self-weight, lowering foundation and overall project cost.
Customizable Technical Parameters
| Parameter | Standard Range / Options |
|---|---|
| Design Life | 75 – 100 years |
| Span Configuration | Single span: 6m – 50m; Continuous span: up to 8 spans |
| Bridge Overall Width | 2m – 24m (fully customizable) |
| Girder Depth | 0.8m – 3.5m, customized per span and load conditions |
| Steel Material Grade | ASTM A709 (36/50/50W/HPS 70W), ASTM A572 |
| Deck Type | Orthotropic steel deck / Concrete composite deck with shear studs |
| Corrosion Protection | Hot-dip galvanizing (ASTM A123), epoxy coating, weathering steel, marine-grade custom coating |
| Field Connection | ASTM A325/A490 high-strength bolted connection / AWS D1.5M field welding |
| Inspection Design | Internal manholes, access hatches and ventilation system per AASHTO standard |
| Auxiliary Facilities | AASHTO-standard safety barriers, customized vehicle/pedestrian railings |
Factory Prefabrication & Quality Assurance
All bridge modules are precisely fabricated in closed factory workshops with standardized quality control:
- Precision Material Processing: CNC plasma cutting, automatic beveling and plate straightening to ensure perfect assembly accuracy.
- Automatic Welding Technology: Adopts SAW and GMAW automatic welding for main seams, ensuring stable welding quality and ultra-low defect rate.
- Full-process In-process Inspection: Visual and dimensional inspection for all tack welds, root passes and final welding passes.
- Professional NDT Testing: 100% UT detection for all FCM welds; MT/PT testing for key structural parts; RT testing available on request.
- Pre-assembly & Camber Calibration: Pre-set professional camber to offset dead load deflection; full shop pre-assembly before delivery to guarantee on-site fitting.
- Complete Quality Documents: Provide official MTRs, WPS, PQR and full inspection records.
Our factory is ISO 9001 certified, and supports third-party inspection by SGS, BV, TÜV and other authoritative institutions.
Logistics, Delivery & On-Site Support
We provide one-stop full-cycle service from production to project completion:
- Customized Transportation Scheme: Module single segment length 10m–30m, adaptable for road, railway and barge transportation to meet international shipping limits.
- Professional Erection Plan: Provide detailed lifting scheme, erection sequence and temporary support layout guide.
- On-site Technical Supervision: Professional technicians guide module positioning, connection assembly and deck construction.
- Post-installation Testing: Support final on-site NDT inspection and load testing to ensure qualified traffic opening.
Conclusion
Our AASHTO LRFD20 Certified Box Girder Steel Bridge with AWS D1.5M Standard Welding Process is a mature, high-reliability modular steel bridge solution. With dual international standard certification, superior structural performance, factory prefabrication efficiency and long service life, it is widely used in highway reconstruction, railway crossing, municipal engineering and industrial infrastructure projects worldwide.
We provide personalized design, accurate budget estimation and standardized fabrication schedule according to your project span, width, load standard and site conditions. Contact us for professional bridge engineering solutions and reliable long-term infrastructure support.
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