Recently, GNEE successfully completed the delivery of 60.48 tonnes of SY390 Larssen III (U-type) steel sheet piles to a core project site in Indonesia. This batch was manufactured in strict compliance with the JIS A5528 standard. The SY390 grade used offers higher yield strength than conventional SY295, enabling it to effectively withstand the soft soil conditions and high-pressure environments typical of Indonesia's coastal regions, ensuring structural stability.
This successful delivery once again demonstrates our expertise in providing high-standard steel solutions for the Southeast Asian market.
Order Information
| Item | Specification |
| Project Location | Indonesia |
| Product | Hot Rolled U-type Steel Sheet Piles (Larssen Type III) |
| Steel Grade | SY390 (High Strength) |
| Standard | JIS A5528 / JIS A5523 |
| Dimension | 400 x 125 x 13.0 mm |
| Unit Weight | 60 kg/m |
| Length per Piece | 12.0 m |
| Total Quantity | 84 Pieces |
| Total Weight | 60.48 Tons |
| Application | Marine & Port Infrastructure, Deep Foundation Retaining Systems, Water-tight Cofferdams, and Wharf Reinforcement |
Project Requirements and Product Selection
The steel sheet piles supplied for this shipment will be used in a port construction project in Indonesia, where stable retaining structures are required to support excavation and waterfront infrastructure. Considering the coastal environment and construction conditions, the project required sheet piles with high structural strength, reliable interlock performance, and efficient installation.
After evaluating the project requirements, SY390 Larssen III U-Type Steel Sheet Piles were selected as the preferred solution.Compared to the standard SY295, SY390 offers a 32% higher yield strength. This superior grade allows for:
Greater Penetration Depth: Essential for driving into the dense silty layers typical of Indonesian coastal regions.
Higher Lateral Load Resistance: Crucial for deep-pit cofferdams where water and soil pressure are extreme.
Reduced Deformation: Ensuring the structural integrity of the retaining wall throughout the project lifecycle.
Technical Comparison & Specifications
| Feature | SY390 (Selected Grade) | SY295 (Standard Grade) | Why it matters |
| Yield Strength |
≥390 N/mm² |
≥295N/mm² |
32% higher load-bearing capacity. |
| Tensile Strength |
≥490 N/mm² |
≥440N/mm² |
Enhanced structural safety factor. |
| Section Modulus |
1340 cm³/m |
Same | Minimizes wall deflection under pressure. |
| Wall Thickness | 13.0 mm | Same | Superior durability in corrosive marine soil. |
| Interlock Type | Larssen Type | Larssen Type | Guaranteed water-tightness for cofferdams. |
Our Quality Control & Compliance of SY390 Larssen III U-Type Steel Sheet Piles
1. Material Compliance & Traceability
Manufactured strictly to JIS A5528, we provide a Mill Test Certificate (MTC) for each batch of SY390 piles to ensure full traceability and high-load performance.
2. Dimensional Tolerance & Straightness Control
We conduct sampling inspections of Width, Flange Thickness, and Height to meet allowable tolerances. Specific focus on Straightness ensures predictable alignment during installation.
3. Interlock Engagement & Functional Testing
To verify the Larssen Interlock performance, we perform Pass-through Testing (Mandrel Test) on representative sections to ensure smooth engagement and minimize onsite driving friction.
4. Surface Condition & Seaworthy Packaging
Optimized for Indonesia's tropical marine climate, our packaging prioritizes surface integrity during transit to mitigate the effects of high humidity and salinity.
Our Logistics & Market-Specific Solutions for SY390 Larssen III U-Section Steel Sheet Piles
Specialized Bundling & Handling
To facilitate efficient unloading at Indonesian port terminals, the piles are secured in optimized bundles with designated lifting points. This design ensures safety during crane operations and reduces terminal handling time.
Seaworthy Reinforcement & Protection
For this 60.48-ton shipment, we utilized Heavy-Duty Container Loading with professional internal bracing to prevent shifting. To mitigate oxidation in tropical maritime transit, we employ specific stacking methods that minimize direct exposure to salt spray.
Strategic Document Support
We provided a verified Form E (ACFTA Certificate of Origin), allowing our client to benefit from preferential tariff treatment in Indonesia. This ensures smooth customs clearance and optimizes the project's overall procurement cost.
Applications of Our SY390 Larssen III U-Profile Steel Sheet Piles
The SY390 Larssen III profile is engineered for high-performance applications in diverse Indonesian geological conditions. Beyond port construction, this high-strength solution is ideally suited for:
Deep Excavation & Cofferdams: Providing robust earth retention and superior water-tightness for bridge pier foundations and pumping stations.
Riverbank & Coastal Protection: Effectively resisting lateral soil pressure and wave impact in soft-soil delta regions.
Infrastructure Support: Ensuring structural stability for urban basement construction and underground utility tunnels.
Conclusion: Engineering a Stronger Future for Indonesia's Infrastructure
This successful shipment of 60.48 tons of SY390 Larssen III steel sheet piles is a testament to GNEE's commitment to technical excellence and logistical reliability. By combining the high-strength advantages of SY390 steel with the proven geometry of the Larssen III profile, we have provided a solution that balances structural integrity, cost-efficiency, and construction speed.
Our deep understanding of the JIS A5528 standard, coupled with our expertise in navigating the complexities of Indonesia's tropical marine environment and customs regulations (Form E), ensures that we deliver more than just products-we deliver peace of mind. As Southeast Asia continues its rapid infrastructure expansion, we remain dedicated to being a trusted partner for contractors and engineers seeking high-performance foundation solutions.
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