Long-Span 4mm S350 Galvanized Composite Bridge Decking is a high-performance stay-in-place formwork system optimized for modern highway bridge construction. Made of S350 high-strength steel with robust 4mm thickness, it delivers outstanding rigidity and long-span capacity to simplify bridge structural layout.
During construction, the decking safely supports wet concrete, rebar and live loads as permanent formwork. After concrete curing, it integrates structurally with the slab to enhance overall strength and stability. With premium hot-dip galvanized finishing, it resists harsh highway environments, providing reliable, long-term performance for fast-track infrastructure projects.
Engineered for Long-Span Structural Efficiency
Different from conventional thin-gauge decking, the combination of 4mm heavy thickness and S350 high-strength steel greatly improves bending stiffness and load capacity. It achieves maximum 4.5m unsupported span under standard construction loads, effectively optimizing the whole bridge structure:
- • Widens girder spacing and reduces primary beam quantity
- • Minimizes or eliminates temporary shoring and intermediate supports
- • Simplifies structural design and on-site construction procedures
- • Reduces overall dead load and foundation pressure
This high-span design delivers a lighter, more economical and safer bridge system.
Fast-Track Construction & Higher On-Site Efficiency
Adopting permanent formwork structure, this decking completely cancels traditional formwork erecting, stripping and disposal processes, greatly improving construction efficiency:
- • Factory prefabricated & pre-marked panels for quick positioning
- • Fast welding or screw fixing on supporting girders
- • Forms safe working platform immediately after installation
- • Allows continuous rebar placement and concrete pouring
It shortens deck construction time by 20–30%, accelerates project progress and brings earlier project delivery.
S350 High-Strength Steel – Stable Mechanical Performance
Manufactured from standard S350 structural steel, featuring 350 MPa minimum yield strength and 510–650 MPa tensile strength. The material provides excellent rigidity under heavy construction loads with minor deflection.
It offers ≥20% elongation ductility and ≥34J low-temperature impact toughness at -20°C, preventing brittle fracture under dynamic traffic and adapting to cold climate regions. High strength-to-weight ratio realizes lightweight structure without sacrificing safety.
4mm Heavy Gauge – Superior Rigidity & Construction Stability
The upgraded 4mm heavy thickness provides obvious advantages over ordinary thin decking:
- Strong resistance to concentrated construction loads and surface denting
- Anti-deformation during transportation, hoisting and installation
- Stable working platform with low vibration during concrete pouring
- Extra structural reserve for long-term traffic load and natural corrosion
It ensures stable construction quality and long-term structural durability.
Hot-Dip Galvanized Finish – 50+ Years Anti-Corrosion Protection
All panels are hot-dip galvanized complying with ASTM A653 G165 (Z600) standard, with total coating weight ≥600g/㎡.
The uniform zinc layer provides reliable cathodic protection, effectively resisting road de-icing salt, moisture, chloride and atmospheric corrosion. No on-site painting is required, achieving 50+ years maintenance-free service and greatly reducing bridge lifecycle maintenance costs.
Full Steel-Concrete Composite Action
Designed with professional embossed shear structures on the surface, the decking realizes complete composite action with concrete slabs. It effectively transfers horizontal shear force, acts as tensile reinforcement of the deck, and improves overall flexural stiffness and load capacity.
This composite structure allows thinner concrete slabs, lighter dead weight and better fatigue resistance, fully meeting modern highway bridge design standards.
Customized Design & Flexible Adaptability
We provide full customized solutions for different project conditions:
- • Adjustable profile height, rib spacing and plate length
- • Custom side laps & end laps for seamless splicing
- • Pre-punched holes and welding tabs for easy installation
- • Enhanced galvanized coating for coastal and high-corrosion areas
All customized drawings and technical documents are provided to match your bridge geometry and load requirements.
Technical Performance Data
Strict Quality Assurance
Our production is certified by ISO 9001:2015, with full material traceability. All raw steel undergoes chemical and mechanical testing in accordance with ASTM standards.
Finished products are strictly inspected for dimension, profile accuracy and coating uniformity. Complete MTR reports, galvanizing certificates and test documents are supplied. Third-party inspection by SGS/BV/TUV is acceptable.
Outstanding Lifecycle Cost Savings
Although the initial investment is slightly higher than traditional formwork, the overall economic benefit is prominent:
- • No repeated formwork purchase, rental and disposal costs
- • Greatly reduced installation labor and construction period
- • Zero long-term anti-corrosion painting maintenance
- • Early project completion improves operational benefits
Total comprehensive construction cost can be reduced by 15–25%.
Optimized Construction Safety
The rigid 4mm deck panels form an immediate anti-slip working platform after installation. It eliminates high-risk form stripping work, avoids falling hazards and structural collapse risks during concrete pouring.
Standardized prefabricated structure reduces on-site rework, ensuring safer and more orderly construction.
Green & Sustainable Infrastructure Solution
• 100% recyclable steel material, no VOC harmful substances- • Eliminates waste from disposable timber formwork
- • High strength and lightweight design reduces carbon emission
- • Long service life lowers resource consumption
Suitable for green building and LEED-certified infrastructure projects.
Wide Application Scenarios
• Highway & expressway bridge deck construction- • Urban overpasses and flyovers
- • Steel & concrete box girder bridges
- • Bridge widening, renovation and deck replacement
- • Industrial and port access bridges
- • Coastal high-corrosion environment bridge projects
-
Why Choose Our 4mm S350 Galvanized Composite Bridge Decking
