State road agency road safety barrier system.
Public Domain W-Beam Guardrail
- Guardrail manufactured to state road authority specifications
- High visibility guardrail creates driver confidence
- The post and block design reduces wheel snagging and the consequential effects of vaulting or rollover
- Can be used in verge or median locations
- Hot dip galvanised in accordance with AS/NZS 4680
- Public Domain W-Beam Guardrail FAQs
How does Public Domain W-Beam guardrail function?
Safe vehicle containment and re-direction is developed through a combination of the flexural resistance of the w-beam guardrail and the bending resistance of the supporting posts.
Upon impact, the posts absorb some of the crash energy through post rotation in the surrounding soil prior to separation from the guardrail as they fully yield. The blocking pieces, positioned between the guardrail and posts, minimise vehicle snagging and reduce the potential for the vehicle to vault over the barrier by maintaining rail height during the initial stages of impact.
Once the guardrail separates from the posts, the rail forms a re-directive ribbon, guiding the vehicle away from the nearby hazard.
What designs are available?
Guardrail designs are manufactured in accordance with Australian state road agency designs. Designs vary from state to state. The most common is a w-beam guardrail supported by a c-post and steel blocking piece.
What is the spacing between posts?
Post spacing varies from state to state. Typically NSW, QLD and SA adopt a post spacing of 2.0m. Victoria has a post spacing of 2.5m.