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Heavy-duty Welded Steel Plate Girder Bridges used in Highway and Railway Construction
APPLICATION
Highway & Railway Bridges: Steel bridges are widely used in highway and railway systems to support heavy traffic loads and long-span crossings. They provide high structural strength, excellent durability, and stable performance under continuous dynamic loads such as vehicles and trains.
Urban Flyovers & Pedestrian Crossings: In urban infrastructure, steel bridges are commonly applied in overpasses, flyovers, and pedestrian walkways. Their lightweight structure and fast installation help reduce traffic disruption while ensuring safe and efficient urban mobility.
Industrial & Mining Access Bridges: Steel access bridges are essential in industrial zones, mining areas, and energy projects. They are designed to withstand harsh environments, heavy equipment movement, and frequent loading conditions, ensuring reliable connectivity for operations.
Military & Emergency Temporary Bridges: These bridges are designed for rapid deployment in emergency response, disaster relief, and military operations. Steel modular structures allow quick assembly, high mobility, and strong load-bearing capacity in critical situations.
PRODUCT DETAIL
Core steel structure products for bridge construction
1. Main steel structure bridge type
| Product Type | Specification Range | Core Function | Central America Adaptation |
| Truss Bridge | 15–120 m span | Long-span load-bearing structure for vehicles, pedestrians, and light rail | Seismic-grade bolted joints; modular prefabrication; corrosion-resistant for tropical climates |
| Arch Bridge | 20–150 m span | Efficient load transfer for heavy traffic and urban/scenic settings | Hot-dip galvanized steel (Zn ≥ 85 μm); adjustable bearings for seismic activity; modular segments for remote sites |
| Box Girder Bridge | 10–100 m span | High torsional stiffness and bending resistance for highways and elevated roads | Seismic-optimized box section; bolted/welded connections; modular prefabrication for inland transport |
| Pedestrian/Cycling Bridge | 5–50 m span | Lightweight steel structure for safe pedestrian/cyclist use | Anti-slip deck panels; corrosion-resistant; quick-assembly modular design for tropical climates |
2. Enclosure system products (weatherproof + anti-corrosion)
| Product Type | Specification Range | Core Function | Central America Adaptation |
| Roof Deck Panels | C12×25–C18×35, hot-dip galvanized (Zn ≥ 85 μm) | Supports bridge decking and roof panels; designed for high winds | Corrosion-resistant coating; modular, lightweight for easy transport and quick installation |
| Side Wall Panels | Z10×22–Z16×28, salt spray resistance >1000 hrs | Weatherproof enclosure for walkways and maintenance paths | Ventilated to reduce condensation; corrosion-resistant for hot, humid climates |
| Bracing & Support System | Galvanized round bars Φ14–Φ18 and L60×6 angle steel | Provides lateral stability; withstands hurricane-level winds and seismic forces | Bolted/welded connections for seismic zones; corrosion protection for tropical conditions |
3. Supporting auxiliary products (localized construction adaptation)
| Product Type | Specification Range | Core Function | Central America Adaptation |
| Expansion Joints | Modular steel or rubber, 50–200 mm width | Allows thermal expansion and contraction of bridge spans | Seismic-grade, corrosion-resistant for tropical and humid climates |
| Guardrails & Safety Barriers | Steel channels or tubes, 900–1200 mm height | Protects vehicles and pedestrians; enhances bridge safety | Anti-corrosion and UV-resistant; suitable for high rainfall and coastal areas |
| Bridge Access Ladders & Platforms | Galvanized ladders Φ32–Φ50, platforms L50×5 | Provides safe inspection and maintenance access | Lightweight, modular, corrosion-resistant for tropical weather |
| Drainage & Water Management Systems | Steel grates Φ12, C-section gutters 100×50–150×75 | Directs rainwater and prevents deck flooding | Hot-dip galvanized or painted for high humidity and storms |
| Lighting & Utility Supports | Steel poles, brackets, cable trays | Supports lighting, signaling, and utility lines | Pre-coated for corrosion resistance; easy mounting and modular replacement |
STEEL STRUCTURE PROCESSING
Cutting
Plasma and flame cut for thick steel plates.
Precision shearing machines for thin plate.
Guaranteed correct size and clean cut edge.
Forming
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Used for purlins, gutters, and trims.
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For producing circular members and round supports.
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Ensures consistent dimensions and shape during fabrication.
Welding
Submerged arc welding is applied for h-beams and big columns
Manual arc welding connection plates and structural joints
CO₂ gas shielded welding for thin plates
Hole Processing
CNC drilling to ensure exact bolt hole alignment
Punch press machines for small-volume production
Accurate positioning enables easy install on site
Surface Treatment
Shot blasting/sand blasting to get rid of rust
Grinding of welds, surface polishing/finishing
Galvanizing of bolts and supporting parts for improved corrosion resistance
Trial Assembly
Pre-fabricating the columns, beams and bracing systems
Dimensional inspection with professional measuring instrument
InKine Disassembly after Inspection for secure shipment
STEEL STRUCTURE TESTING
| Test Type | Standards | Purpose / Description |
| Structural Load Testing | ASTM A370, EN 10002 | Verifies that beams, girders, and truss systems can safely withstand dead loads, live loads, vehicle loads, and dynamic service conditions. |
| Weld Quality Inspection | AWS D1.1, ISO 5817 | Ensures welding joints meet international quality levels, especially for critical structural components such as trusses, box girders, and column connections. |
| Corrosion Resistance Test | ASTM B117, ISO 9227 | Evaluates steel performance under salt spray conditions, ensuring long-term durability in coastal, marine, and high-humidity environments. |
| Coating Adhesion Test | ASTM D3359, ISO 2409 | Measures bonding strength of protective coatings and galvanizing layers to prevent peeling, cracking, or delamination. |
| UV & Weathering Resistance | ASTM G154, ISO 4892 | Simulates long-term exposure to sunlight and climate conditions to assess coating color stability, chalking resistance, and surface durability. |
| Humidity & Heat Resistance | ASTM D2247 | Tests coating performance under high temperature and high humidity to prevent blistering, corrosion, and surface failure. |
| Impact & Handling Resistance | ASTM D2794, ISO 6272 | Evaluates coating and surface resistance during transportation, lifting, installation, and on-site handling. |
| Dimensional & Straightness Inspection | EN 1090, ISO 8501 | Ensures prefabricated steel components meet precise dimensional tolerances for accurate installation and structural alignment. |
| Fatigue & Vibration Testing | ASTM E466, ISO 12107 | Assesses long-term structural performance under repeated loads, including traffic, wind, and vibration effects. |
| Anchor & Bolted Connection Testing | ASTM F606, EN 14399 | Verifies strength and reliability of bolts, anchors, and seismic connections used in structural steel systems. |
SURFACE TREATMENT
PACKAGING AND SHIPPING
Trusses & Girders: Bundled with steel bands and wood supports. Corner protectors and anti-corrosion wrap prevent damage during transport.
Deck & Roof/Wall Panels: Palletized with spacers; wrapped with waterproof and UV-resistant film for tropical climates and long-distance shipping.
Columns & Beams: Crated or bundled with shock-absorbing, rust-free wrapping and labeled for correct handling on site.
Ancillary Parts: Bracing, bolts, and anchors packed in boxes or drums with waterproof protection and labeled for quick assembly.
Transport & Logistics: Shipped by sea, truck, or container; components sized and bundled for safe delivery and fast installation, even to remote sites.
WHY CHOOSE OUR STEEL STRUCTURES?
Our steel plate girder bridge for heavy loads is designed for major projects of infrastructure, that need superior strength, long lasting, and quick deployment.
Quick Assembly: Pre-assembled modules facilitate assembly in days with minimal equipment
Reusable & Relocatable: Developed for disassembly for use in multiple locations
Rugged & Test Proven Design: Classic panel truss system with proven military and construction history
No Heavy Foundation Required: Can be used with simple abutments or pier supports
Ready To Ship: Standard widths and spans are available from stock for quick delivery.
Ready to start your project?
FAQ
Q1: What types of bridges do you provide?
A: Truss, arch, box girder, and pedestrian/cycling bridges, fully custom-engineered.
Q2: What standards do your components meet?
A: ASTM, EN, ISO, and AASHTO; hot-dip galvanizing or weathering steel available.
Q3: Are bridges suitable for tropical and seismic regions?
A: Yes, designed for high wind, seismic activity, and tropical climates.
Q4: How are components packed and shipped?
A: Bundled, crated, and corrosion-protected; labeled for easy on-site assembly.
Q5: Typical lead time?
A: 8–20 weeks depending on design and complexity; modular prefabrication reduces installation time.
Address
Bl20, Shanghecheng, Shuangjie Street, Beichen District, Tianjin, China
Phone
+86 13652091506
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