Montague St/ Bolte Bridge On Ramp (West Bound)


Rapid failure of ductile iron/concrete infill pit lids. Potential for dangerous concrete projectiles as covers deteriorate.

Expensive maintenance costs – requiring lane closures & traffic management, & OH&S risks associated with heavy ductile iron/ concrete infill lids.


Strong & durable (able to withstand heavy freeway traffic), light weight pit lids.

Ease-of-access, addresses OH&S considerations.


  • Terra Firma ThruBeam E400 ER-90
  • Cover weight 46kg
  • NATA tested to AS3996 Class E (400kN)
  • Secure & lockable, and can be easily opened in seconds.
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