Product Properties

Mechanical, Electrical, Flammability, and Combustion Properties

Specific Gravity Specific Gravity 0.85 – 0.90
Density 849-897 kg/m3
Thermal Expansion Coefficient of Thermal Expansion 0.000074 cm/cm/ºC
Compression Compressive Strength (Parallel to Grain) 20.6 MPa average
Compressive Strength (Perpendicular to Grain) 8.3 MPa average
Permanent Deformation Under Load (13,608 kg) 0.33cm
Flexural Modulus of Elasticity (Flexural) 1,724 MPa average
Shear Strength (Calculated) 10.3 MPa
Modulus of Rupture (Bending) 20.6 MPa average
Plate Compression (MOE) 176.5 MPa
Screw Spike Pullout
Modulus of Mechanical Fastener Screw Spike Pullout*
*using 11/16″ screw, 14mm nominal diameter hole, 97 mm clip
31.6 kN
Single Tie Push Test Single Tie Push (Newly Installed) 12.2 kN
Cyclic Load Tie Wear 3 Million Cycle Test
9,525 kg rotated between gage side and field side
No cracking developed
in the rail-seat area

For more information download the Mechanical Performance Data Sheet below:
Data Thumbnail

Testing of sleepers has been conducted at third party test facilities including:

  • Chicago Transit Authority (CTA)
  • Société Nationale des Chemins de fer Français (SNCF)
  • U.S. Army Corps of Engineers (USACE)
  • Construction Technology Laboratories, Inc. (CTL)
  • STARK Pty, Ltd.
  • Villanova University
  • NGC Testing Services
  • Transportation Technology Center, Inc. (TTCI)
  • VTEC Laboratories, Inc.
  • Rutgers University
  • TRACE Laboratories, Inc.

  “We look forward to testing these new recycled plastic and sustainable replacements for wooden ties and to hopefully solving one of the challenges we face in the decline of readily available and reliable wooden ties.” Mark Gullery, Kiwi Rail

Benefits Properties Dimensions Documents Image