What Is a U-Type Steel Sheet Pile? Dimensions, Grades & Specifications

U-type steel sheet pile is a hot-rolled steel section with a symmetrical U-shaped profile. Adjacent piles interlock through the interlocks on their vertical edges and, once driven one by one, form a continuous wall that retains soil and - through its watertight interlocks - blocks water as well.

U-type steel sheet pile is a hot-rolled (or cold-formed) steel section with a symmetrical U-shaped profile. The open U-shape concentrates material in the section to give stiffness, while the vertical flanges take the lateral thrust of soil and water. Along the two edge flanges runs a formed interlock extending the full length of the pile on each side. When one pile is set beside the next, the interlocks engage; as the piles are driven one by one, adjacent piles are connected by the interlocks into a continuous wall, and seepage is sealed at the watertight interlocks.

Hot-rolled U-type sheet piles are the workhorse in most markets, produced to uniform dimensions in established series (such as the PU, AU, and GU families) and offered in a range of steel grades.

Symmetrical U-Shaped Section: the U-shaped section delivers a higher section modulus and moment of inertia at equal weight, allowing the wall to carry lateral earth and water pressure by stiffness rather than by section size alone.

Edge Interlocks: the interlocks on each vertical flange transfer load between piles and form a watertight line; kept intact and lubricated, they link the whole row into a continuous, near-watertight wall.

Hot-Rolled Forming: hot rolling ensures precise dimensions and well-formed interlocks, and lets the pile withstand vigorous driving while the interlocks hold their shape.

The U-type section is defined by single-pile width, section depth (U height), plate thickness, and single-pile total length. Typical ranges are roughly as follows (varying slightly by series and manufacturer):

Width - single pile generally about 400 to 600 mm.

Section Depth (U Height) - about 100 to 215 mm.

Plate Thickness - generally 8 to 24 mm.

Driven Pile Length - supplied to the wall's requirement; where the required length exceeds the single-piece production length, the pile sections are spliced within the wall.

Representative U-Type Section Dimensions

Representative values only, for initial reference; confirm exact section, grade, and length against the mill certificate for the standard the project specifies.

Note:Steel grade follows the duty: higher-strength grades (such as S390GP, Q420P) allow lighter sections to carry deeper or more heavily loaded walls; permanent, submerged faces call for marine or corrosion-allowance grades. Section, grade, and length are confirmed against the project's specified standard by mill certificate.

Waterfront and marine - quay walls, cofferdams, offshore works, and revetments under wave and corrosion loading.

Excavation and ground works - foundation pits, basements, and road cuts where the wall both supports and seals.

Water control - flood walls, pumping stations, and river structures that retain, guide, and divert water.

Protection - bridge pier protection, where the same pile resists scour, impact, and the thrust of the current.

U-type steel sheet pile is a hot-rolled steel section with a symmetrical U-shaped profile and full-length interlocks; once the whole row is driven it forms a continuous earth-retaining wall - and, through its watertight interlocks, becomes a wall that retains water equally well. It is selected by width, depth, thickness, length, and steel grade, supplied to GB/T 20933, EN 10248, JIS A 5528, or ASTM, and confirmed by mill certificate.

If you are selecting a U-type sheet pile section or steel grade, please send us your width, depth, thickness, length, quantity, and the required standard, and our team will confirm the section and grade suited to that wall.

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FAQ:

What is a U-type steel sheet pile?

A U-type steel sheet pile is a hot-rolled (or cold-rolled) steel profile with a symmetrical U-shaped section that interlocks at its vertical edges. Driven as a range, the piles close into a continuous wall that retains soil and, with a watertight interlock, holds back water.

What is the difference between hot-rolled and cold-formed sheet piles?

Hot-rolled U-type piles are formed at rolling heat, giving accurate dimensions, a well-shaped interlock, and good capacity to be driven hard; cold-formed sections are shaped from flat steel and are commonly used in some lighter or different-profile applications. Because of the reliable lock and section, hot-rolled U-piles are the mainstream form in most markets.

How long can a U-type sheet pile be?

Piles are furnished in stocked lengths, commonly up to about 15–18 m in a single piece, and longer reaches are made by splicing sections in the wall. Length is set by the design penetration and confirmed against the producing mill.

What dimensions define a U-type section?

A U-type section is defined by width per pile, section depth (the height of the U), steel thickness, and overall length. Common sections range from about 400 mm to 600 mm wide and about 100 mm to 215 mm deep; thickness and properties follow the section and the grade.

What information does a quotation need?

Share the section (or width, depth, and thickness), the required pile length and quantity, the steel grade and governing standard (GB/T 20933, EN 10248, JIS A 5528, or ASTM), the design life and any coating or corrosion allowance, and the delivery and destination. With these, we can quote the section and grade that best carry the wall.