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U-Type Steel Sheet Piles (Larssen Piles) | Product Specification & Technical Guide – Royal Steel Group

What are Steel Sheet Piles?

Steel sheet piles are long structural sections featuring a precision-engineered interlocking system that creates a continuous, airtight, and earth-retentive wall. Whether hot-rolled or cold-formed, these piles are the backbone of modern civil engineering, used extensively for excavation support, flood control, and marine infrastructure.

Key Global Standards:

ASTM (American): A328, A572 Gr. 50/60

EN (European): EN 10248 / EN 10249

JIS (Japanese): JIS A5523 / A5528

GB (Chinese): GB/T 20933-2014

Industry Insight (2026): As urban underground development and coastal resilience projects accelerate across Southeast Asia and Latin America, U-type piles have become the preferred choice due to their "Install-and-Use" efficiency, requiring zero curing time compared to concrete alternatives.

Featured Specification: Type 3 (III) Sheet Piles

The Type 3 (III) pile is considered the "Golden Standard" for medium-to-deep excavation. It offers the ideal ratio between weight-to-strength and cost-efficiency.

Technical Reference:

Parameter Typical Value Note
Effective Width 400 mm – 600 mm 600 mm wider profiles (e.g., IIIw) maximize installation speed.
Height 125 mm – 180 mm Defines the rigidity of the wall.
Weight 60 kg/m – 81.6 kg/m Varies based on manufacturing process.
Section Modulus 1,350 – 1,600 cm3/m Crucial for deep excavation structural integrity.
Steel Grades S355GP, SY390, Gr. 50 Globally compatible high-tensile grades.

Classification & Material Grades

Manufacturing Processes

Hot-Rolled (Premium): Features superior interlocking tightness and high bending resistance. Designed for heavy-duty projects and high turnaround (reusable up to 10+ times).

Cold-Formed (Cost-Effective): Offers flexibility in custom sections. Best suited for shallow-to-medium excavations and temporary shoring.

International Compatibility

European (EN 10248): S355GP Steel Sheet Pile – The standard for international tenders.

American (ASTM): A572 Gr. 50/60 Sheet Pile – The primary choice for North and Latin American port projects.

Japanese (JIS): SY295 / SY390 Steel Pile – Widely specified in SE Asian hydraulic engineering.

Why Choose U-Type Sheet Piles

Structural Integrity: The U-shaped geometry provides a high moment of inertia, making it exceptionally resilient against lateral soil and water pressure.

Superior Seepage Control: The tight interlocks, when applied with sealants, create an impervious barrier—essential for coastal and riverside construction.

Circular Economy & Sustainability: Depending on geological conditions, these piles can be reused 5 to 10+ times, significantly lowering the environmental footprint and project overhead.

Operational Speed: Utilizing vibratory hammers or silent pilers, installation is 20%–40% faster than bored piles, accelerating project timelines.

Why Do Global Buyers Choose Royal Steel Group?

Royal Steel Group: Global Supply Capabilities

We provide end-to-end support for infrastructure projects worldwide:

Inventory: 5,000+ tons of ready-to-ship stock (Type III, IV, and more).

Customization: Standard lengths from 6m to 24m. (Note: Piles exceeding 18m are optimized via specialized welding or breakbulk shipping).

Advanced Protection: In-house coating services including Zinc-rich primers, Coal Tar Epoxy, and Hot-Dip Galvanizing for a 50-year design life in marine environments.

Engineering Consulting: We assist with profile selection, design optimization, and on-site installation guidance.

Why Do Global Buyers Choose Royal Steel Group?

Royal Steel Group: Global Supply Capabilities

We provide end-to-end support for infrastructure projects worldwide:

Inventory: 5,000+ tons of ready-to-ship stock (Type III, IV, and more).

Customization: Standard lengths from 6m to 24m. (Note: Piles exceeding 18m are optimized via specialized welding or breakbulk shipping).

Advanced Protection: In-house coating services including Zinc-rich primers, Coal Tar Epoxy, and Hot-Dip Galvanizing for a 50-year design life in marine environments.

Engineering Consulting: We assist with profile selection, design optimization, and on-site installation guidance.

Core Applications

Foundation Support: Subway stations, deep basements, and underground parking.

Hydraulic Engineering: Cofferdams, river embankment reinforcement, and flood walls.

Marine & Energy: Port quay walls, offshore wind farm cofferdams, and oil/gas pipeline protection.

Representing "Made in China", BE RESPONSIBLE FOR EACH TON OF STEEL WE EXPORT！

steel sheet piles Core Applications ROYAL STEEL GROUP (1)

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Website: www.royalsteelgroup.com

Inquiries: sales01@royalsteelgroup.com

WhatsApp: +86 136 5209 1506

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ROYAL GROUP

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Kangsheng development industry zone,
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Post time: Apr-21-2026