Kwinana Freeway Northbound Widening

BMD Constructions

Perth, WA

May to July 2020

Scope of Work

The Dowsing Group WA Slipform team was contracted to install 4 different types of concrete safety barrier along the Public Transport Authority rail corridor, northbound on the Kwinana Freeway.

The scope of works included:

  • 7KM TL5 with 75mm embedment
  • 520M of TL5 with 200m Embedment
  • 540m of Type 3A Barrier
  • 70m of Type 3B barrier
  • In-situ construction of various end treatments


  • Installation of 2.3KM of barrier in a 2 week period.
  • Installation of the first type 3A & 3B barriers in WA.
  • Operation of 2 crews for a 2-week period to meet the clients tight program and install 1700m3 of concrete in 14 shifts.
  • Successful installation of split-level barriers including the tallest slipform barrier in Perth at 1.72m tall.
  • Implementation of machine adjustments and counterweights to allow barrier to be extruded at this height.