3m Height Steel Box Girder Bridge Weather Resistant Modular Steel Bridge
Price:
1000USD ~ 2000USD Per ton
MOQ:
negotiation
Delivery Time:
negotiation
Brand:
EVERCROSS
Product Description
3m Height Steel Box Girder Bridge Weather Resistant Modular Steel Bridge
Product Specifications
| Attribute | Value |
|---|---|
| Product Name | Steel Box-girder bridge |
| Bridge Deck | Concrete |
| Type | Single Box Girder Bridge; Double Box Girder Bridge; Multiple Box Girder Bridge |
| Material | Prefabricated Steel |
| Height | 3m |
| Grade | Q345B, Q335B |
| Wind Resistance | Class12 |
| Weather Resistance | Weather Resistant |
| Maintenance Requirements | Low Maintenance |
| Dimensions | Prefabricated |
| Color | Army blue |
| Durability | Durable |
| Weight | 5000tons |
| Turnaround Time | 60 to 90 days |
| Width | 10m |
| Installation Method | Cantilever Construction |
Product Description
The steel box-girder bridge is a modern structural solution composed of top plate (bridge panel), beam web, bottom plate, longitudinal stiffener, transverse stiffener, and diaphragm plate (cross beam). With thickness ranging from 12-30mm for main plates and 10-20mm for secondary plates, these bridges are manufactured in factory fragments (typically 10-30m sections) and assembled through site welding.
Orthotropic Steel Bridge Panels
The lower edge of the top plate is welded with vertical and horizontal stiffeners to form an orthogonal bridge panel. Longitudinal ribs feature both open and closed cross-section forms, typically inverted T-shaped, with transverse ribs containing notches for continuous longitudinal rib passage.
Structural Forms
Steel box girders serve as primary structural elements for various bridge types including beam bridges, suspension bridges, and cable-stayed bridges. The closed section provides excellent bending and torsional resistance while offering corrosion protection and utility space.
Single Box Steel Girder Bridge
Ideal for bridges with widths ≤3 lanes or width-to-span ratios Effective flange width with main beam web interval ≤Le/5 Main beam cantilever length ≤Le/10 Lifting beams and side beams for long cantilevers Steel deck improves bridge panel stiffness
Double Box Steel Girder Bridge
Used when bridge width makes single box impractical due to size, transportation, or installation constraints. Beams may be optional depending on design requirements.
Multi-box Steel Girder Bridge
Optimal for wide bridges with small spans, featuring uniformly spaced main beams for balanced load distribution.
Structural Components
Longitudinal Beams: Reduce span of concrete bridge panels (≤3m spacing) and enhance steel panel stiffness. ![Longitudinal beam structure in steel bridge design]()
Transverse Beams: Distribute loads evenly across multiple boxes (spacing ≤6m with longitudinal beams, ≤20m without). ![Transverse beam arrangement in steel box girder bridge]()
Supports: Single-box bridges require two end supports for torque resistance, while multi-box bridges use one support per box with temporary jack supports during construction. ![Support and fulcrum arrangement for steel box girder bridges]()
Transverse Beams: Distribute loads evenly across multiple boxes (spacing ≤6m with longitudinal beams, ≤20m without). 
Supports: Single-box bridges require two end supports for torque resistance, while multi-box bridges use one support per box with temporary jack supports during construction. 
Mechanical Characteristics
Key considerations include: ![Mechanical stress analysis of steel box girder components]()
![Structural reinforcement measures for steel box girders]()
- Compression flange stability under bending moments
- Box girder distortion under torque
- Web crumpling under concentrated forces
Structural Measures: Adequate transverse partitions, stiffening ribs, and proper rib spacing prevent distortion, instability, and buckling during fabrication, transport, and installation.
Applications
Steel box-girder bridges are versatile solutions for: ![Steel box girder bridge in transportation infrastructure application]()
- Road, rail, and high-speed rail infrastructure
- Customizable designs to match project requirements and environments
Advantages
Compared to Truss Girder Bridges:
- Lighter weight with steel savings
- Higher flexural and torsional stiffness
- Sleek, aesthetically simple design
- Large flange width for superior bending resistance
- Excellent torsional stiffness for curved bridges
- Fast construction with good stability
- Hollow structure for easy maintenance and utility access
Evercross Steel Bridges Overview
| Category | Specifications |
|---|---|
| Bridge Types | Bailey bridge (Compact-200, Compact-100, LSB, PB100, China-321, BSB) Modular bridge (GWD, Delta, 450-type, etc) Truss Bridge, Warren bridge, Arch bridge, Plate bridge, Beam bridge, Box girder bridge, Suspension bridge, Cable-stayed bridge, Floating bridge |
| Design Spans | 10M TO 300M Single span |
| Carriage Way | SINGLE LANE, DOUBLE LANES, MULTILANE, WALKWAY |
| Loading Capacity | AASHTO HL93.HS15-44, HS20-44, HS25-44 BS5400 HA+20HB, HA+30HB AS5100 Truck-T44 IRC 70R Class A/B NATO STANAG MLC80/MLC110 Truck-60T, Trailer-80/100Ton |
| Steel Grade | EN10025 S355JR S355J0/EN10219 S460J0/EN10113 S460N/BS4360 Grade 55C AS/NZS3678/3679/1163/Grade 350 ASTM A572/A572M GR50/GR65 GB1591 GB355B/C/D/460C |
| Certificates | ISO9001, ISO14001, ISO45001, EN1090, CIDB, COC, PVOC, SONCAP |
| Welding Standards | AWS D1.1/AWS D1.5 AS/NZS 1554 or equivalent |
| Bolts | ISO898, AS/NZS1252, BS3692 or equivalent |
| Galvanization Codes | ISO1461 AS/NZS 4680 ASTM-A123 BS1706 or equivalent |
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
EVERCROSS BRIDGE TECHNOLOGY (SHANGHAI) CO.,LTD.
Location
10th Floor, Building 1, No. 188 Changyi Road, Baoshan District, Shanghai,China
Contact Person
Libby Chen