OBEX Curve 3 Rail is a TL-4 bridge parapet system offering High Containment performance. The TL-4 Bridge Parapet System is comprised of Cast Aluminium Posts and extruded Aluminium Rail Sections and associated connection fittings. Tested in accordance with NCHRP 350, OBEX Curve 3 Rail provides class leading performance for both TL-3 and TL-4 bridge parapet applications. The systems uses extruded rails and fittings with Aluminium Alloy Type 6082 T6, Aluminium Alloy Type A444.0 T4 for cast posts and Grade A2-70 Stainless Steel fixings to ensure durable and maintenance free performance.

The barrier system is to be installed by trained and certified OBEX installers in accordance with the OBEX installation manual.



Containment Level TL3 & TL4
Acceleration Severity Index "ASI" B
Working Width W2
Test Specification 4–10, 4–11 & 4–12


Height 1090 mm
No. of Rails 3 no.
Overall Width 400 mm
Post Width 200 mm
Post Centers 3m


  • Class-leading performance with post spacing at 3m centres and low working width
  • Lightweight materials reduce dead loads and mitigate health & safety risks
  • Decorative cast post enhances aesthetic treatment with Aluminium finish and optional anodised treatment
  • Design simplicity allows for efficient installations and modifications to facilitate local requirements.
  • Steel pile foundation design available for direct installation in soil.