made in Britain

uPVC Z-Ribbed Piling

Primarily used for retaining and floodwall applications, Liniar’s piling installed in Z-Ribbed format is stronger than standard pile.

Why choose Liniar Standard Pile?

Liniar’s standard pile is a medium strength product which has the versatility to be used in either of two formats. The Z-ribbed format covers slightly more ground and has a shallower front-on profi­le.

Z-ribbed piles interlock on wall extremities to provide a solid web connecting the two flanges.

Extremely versatile and easy to install, Liniar’s plastic ‘Z-ribbed’ piles are similar in appearance to some steel sheet piles. Plastic piling provides a low cost alternative to steel in many circumstances, such as the construction of bridges, drainage systems, manholes and tunnels.

When used in the Z-ribbed format it is also stronger than the existing standard pile, making it suitable for installations where the clean look of plastic piling can be seen.


Liniar’s Z-ribbed piling is predominantly used in retaining and floodwall applications where bending strength governs the design and no deflection (swing) between sheets is required.

Benefits to the Liniar range of Plastic Piling:

  • Does not rot or rust
  • Manufactured from recycled plastic
  • Has no risk from sparking
  • Manufactured in the UK by ourselves, so reduces the environmental impact of the cost of transport
  • Maintains its original appearance over time
  • Not affected by salt water
  • Resistant to the majority of chemicals
  • Resistant to rodent and marine borer attack
  • Can be easily cut or bored
  • Maintenance free
  • Lighter than steel, so easier to handle and transport
  • Has a clean, consistent appearance
  • Available in a number of colours
  • Has the ability to create curved walls and a 90º corner pile is available

Standard Pile (Z-Ribbed) Technical Engineering values

Physical Properties

Material Weight (Sheet) kg/m Weight (wall) kg/m² Width (sheet) mm  Material Thickness mm Lugs
PVC 3.23 9.79 330o/a 5 N

Mechanical Properties

Initial Tan
Modulus kN/mm²
Moment of
Inertia cm⁴/m
Tensile Yield
Strength N/mm²
Secant Modulus
Section Modulus
Moment kNm/m
1450 2.55 510 4.0 40 2.15 100 1.33

Calculations are based on Tensile Strength of material = 40N/mm2. Allowable Moment = Tensile Yield Strength x Section Modulus Factor of Safety = 3

Contact us for more information.

Design and installation

Standard Pile Z Ribbed Installation

Available direct from its UK factory, Liniar has the capability to manufacture plastic piling in a wide range of lengths.

Generally produced in grey, Liniar’s piling can also be made in other colours to suit individual requirements, although a minimum quantity order would apply.

The wide range of piling, manufactured from 100% recycled uPVC, covers various requirements; strength dependency, ease of installation and appearance type.

Mechanical or manual installation can be used with plastic piling.


Introducing Liniar

Liniar HQ

Liniar’s trading company, HL Plastics, have been manufacturing plastic piling for more than 20 years.

In that time it has been increasing its share of the market as more customers become aware of the benefits of the products.

With more than 30 years of experience in plastic extrusion, Derbyshire-based HL Plastics is part of the Flamstead Group of companies.

Liniar plastic piling is available in a variety of lengths ex-stock and is produced in HL Plastics’ own state-of-the-art UK factory.


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