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System W 14 HH

Rail fastening system for concrete ties, ballasted track and heavy haul.
System W 14 HH
with tension clamp Skl 14 R
Features
  • Skl 14 R tension clamp with 1.8 mm fatigue strength
  • Rail tilting protection by middle bend of the tension clamp and special design of angled guide plate
  • Reduction of maintenance costs by permanent elastic tensioning of the rail with tension clamps (2 x 12 kN toe load)
  • Gauge adjustment ±10 mm in 2.5 mm steps

At a glance
  • Captive system
  • Large lateral insulator surface to reduce insulator wear
  • Abrasive Wear Plate to reduce Rail Seat Abrasion
  • Bonding of Abrasive Wear Plate with no influence on toe load
  • Two independent spring arms to apply toe load
  • No squeezed insulator between clip and rail foot
  • No component dismantling required for rail destressing
  • Middle bend as anti roll-over device which avoids loss of toe load due to overstressing
  • Derailments: All components exchangeable

Advantages with the W 14 HH
  • The abrasion plate can be bonded to the tie
  • The act of bonding the abrasion plate to the tie has no affect on the performance of the rail pad between the rail and the abrasion plate
  • The design of the fastening system caters to the application of a bonding agent without any compromise of the tension clamp toe load and roll-over performance
  • The tensioning of the tension clamp is unchanged
  • Several tools and machinery had to be adjusted to the W 14 HH, e.g. simple ones like leveling plates for welding operations or bigger machines like the NVCAR of Nordco for W14HH installation

Design and Testing according AREMA
  • The Fastening System W 14 HH is tested according the requirements of AREMA:
  • E.g. the demands for the creep resistance are met and the repeated load test was performed; there are 3Mio. times 133.5kN applied to the rail head under an angle of 20°
  • Additionally, the new Severe Service Load Test was performed. A vertical force of 144.6kN and a lateral force of 75.2kN are applied on each rail head under an angle of 27,5°. Water and sand are trickled on the rail seat to test behavior regarding Rail Seat Abrasion. Additionally, the temperature is cooled down to -40°C 10 times for 30k to 50k load cycles each time.

Further information