Thrie-Beam™ has an added corrugation that gives an advantage for use in transitions to bridges and along high volume, high speed roadways.


Thrie-Beam™ is roll formed from coil steel and sheared to length. It is then punched, slotted to suit the particular configuration and hot dip galvanised in accordance with AS/NZS 3845: 1999.

Thrie-Beam™ is available ex-stock in standard effective lengths of 4.00 metres and 2.00 metres.


Curved Thrie-Beam™

The standard straight section will align to give a smooth transition on curved with a radius greater than 45m. Pre-curved Thrie-Beam™ is required for tighter radii and may be curved to traffic face concave or convex.

Standards and Approvals

Thrie-Beam™ complies with the requirements of: AASHTO
NCHRP350 TL-3 and TL-4 when used as an approved system
AS/NZS 3845:1999 - Road safety barrier systems
Approved by State Roading Authorities.
Specification differs between states, refer to technical drawings (under Product Literature).

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