Combi wall

Retaining wall structures based on steel piles are often the best solution to replace traditional, labor-intensive cast-in-place based retaining wall structures.

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RR® large diameter piles can be built into a continuous combi wall by welding connectors or complete sheet piles into them. In a combi wall, piles act as the load-bearing structure, while sheet piles installed in between make the wall continuous.

Thanks to SSAB’s high-grade steel, our combi walls have excellent bending stiffness and resistance.


  • Retaining wall structures
  • Building foundations
  • Wharves, piers and quay walls
  • Road and railway structures
  • Bridges
Combi wall


Combi wall

Standard piles and availability of steel grades of Combi pile wall

X = Steel grades S355J2H, S440J2H and S550J2H O = Steel grades S355J2H and S440J2H

*) Please contact our sales for availability

Wall thickness
  10  12.5  14.2  16  18  20  22  23 
RD400   X  X  X            
RD450  X  X  X            
RD500   X  X  X  X  *        
RD550   X   X  X  X  *        
RD600   X  X  X   X  X  O      
RD650   X  X  X  X  X  O      
RD700   X  X  X  X  X  X  O    
RD750   X  X  X  X  X  X  O    
RD800   X  X  X  X  X  X  O  *  
RD900     X  X  X  X  X  O  *  
RD1000     X  X  X  X  X  O  *  *
RD1200     X  X  X  X  X  O  *  *

Steel grades

Standard steel grades of SSAB’s retaining walls. Against special order, the piles may also be delivered in MH steel grades according to standard EN 10219.
Steel grade
Carbon equivalent
Chemical composition, max. Mechanical properties

Impact strength

CEV max. [%] [%] Mn [%]
[%] [%] fymin [MPa] fu [MPa]

Amin [%]


KV min [J]

S355J2H 0.45
355 470-630 20 -20  27
S440J2H 0.45
440 490-630 17 -20  27
550 605-760 14 -20  27

Order & delivery

To order RD® pile wall and Combi wall, please contact our sales.

SSAB applies the General Conditions, ALBIF 2000, for deliveries with the addition that the parties will comply with applicable legislative and regulatory requirements and refrain from participating in any corrupt business practices.

The technical terms of delivery for steel piles manufactured by SSAB are in accordance with the EN 10219-1 and/or ETA 12/0526. The dimensions and tolerances are as defined in EN 10219-2 and/or in ETA 12/0526. Engineering work of piles for pile walls is in accordance with standard EN 12063.

Steel piles are delivered with bundle tags and SSAB's pile markings to enable full traceability and identification.

Type 3.1 material certificate will be provided according to the standard EN 10204.

Design tools

Software for fast and easy design

PileCalc is a design program for SSAB's steel piles. Eurocodes as well as National codes and instructions are applied in the end-bearing pile design.

PileWallCalc design tool enables easy calculation of cross section properties and bending resistances of the pile walls. The program calculates the bending resistances and normal force resistances of RD® pile wall, Combi wall and Zig-Zag Combi wall.

Environmental responsibility and sustainability

SSAB develops new products and services in order to improve our customers’ performance in sustainability and overall efficiency.

Life cycle assessment data for SSAB’s products are available in the form of Environmental product declarations (EPDs). Manufacturing chain from raw material to finished product is carefully managed.

SSAB has introduced CE marking for infrastructure products. Declarations of Performance (DoP) indicate the technical characteristics of CE-marked products.


Customer cases