Structural Parameters

Available in a range of thicknesses NiuDeck offers the engineer a cost-effective solution for a wide variety of application which comply with either, Austroads Bridge design Code or Australian standard AS5100 Bridge design.

In addition a custom design service is available to handle the most challenging applications.


  • Manufactured to a minimum stress grade of F14
  • Light weight
  • Reduced installation time
  • Ballast Boards
  • Flexible design options
  • Custom design service
  • Reliable engineering properties
  • Facilitates bridge widening by cantilevers
  • Sustainable high strength plantation resource
  • ACQ H4 “Veneer Treatment” preservation

Manufacturing Standards

  • AS/NZS 2269:2012; Plywood – Structural
  • AS/NZS 1604.3:2012; Specification for preservative treatment Part 3: Plywood

Design Standards

  • AS 1720.1 Timber structures – Part 1: Design Methods, Section 5 Plywood
  • AS 5100.2:2017; Bridge Design
  • 92 Austroads Bridge Design Code


  • Length up to 14 metres
  • Standard width 1200mm. Non-standard widths from 900 to 1200mm
  • Thicknesses from 54mm to 195mm (thicker available on request)

    Manufacturing Specification

    • “A” Bond (AS/NZS2269)
    • Veneer grade “D” (AS/NZS2269)
    • Preservation treatment to Hazard Class H4 (AS/NZS 1604.3) by veneer treatment method
    • Density of 620 Kg/m3 when shipped
    • Moisture content 8 to 15% when shipped

    Characteristic Properties Bending

    • Stress Grade (parallel/perpendicular) – F14/F14
    • Bending Strength (f’b) (parallel/perpendicular) – 36MPa/36MPa
    • Moisture Factor (AS1720.1) k19 – 0.8
    • Assembly Factor (AS1720.1)g19 – 1.0

    Characteristic Properties Shear

    • Stress Grade (parallel/perpendicular) – F14/F14
    • Bending Strength (f’s) (parallel/perpendicular) – 4.8MPa/4.8MPa
    • Moisture Factor (AS1720.1)k19 – 0.8
    • Assembly Factor (AS1720.1)g19 – 0.4


    • Reduction Factor (ke) is adopted to allow for significant shear deflections
      due to a low shear modulus and span to depth rations of less than 10:1
    • ke – 0.75
    • Standard Thickness Properties (see Niubride Construction Manual for more details)

    Skew Decks

    The above section properties are applicable when the NiuDeck panels are laid perpendicular to the girders. Skew decks are where the panels are laid at an angle other than perpendicular, requiring the section properties to factor in a higher proportion of cross gain veneer which effectively increases the girder spacing.

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