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RocketBloc™

RocketBloc™ is a steel blocking piece designed for retrofitting to Australian Public Domain G4 W-Beam elevating compliance to MASH TL3. 

The development of the RocketBloc™ follows feedback from asset owners seeking to upgrade the containment level of existing G4 W-Beam installations and provide compliance with MASH and AS/NZS 3845.

RocketBloc™ is manufactured from 150x100x4.0mm RHS providing torsional strength and retains the same w-beam rail offset as the substituted C-block. The attachment of RocketBloc™ leaves the existing C-posts undisturbed and features elongated mounting slots allowing the w-beam guardrail to be lifted to a height of 800mm above road level.

RocketBloc - Logo
MASH TL3 Compliant Logo

Features

  • Accepted by the Austroads Safety Barrier Assessment Panel (ASBAP)
  • Complies with MASH TL3
  • Complies with AS/NZS 3845.1 Road Safety Barrier Systems & Devices
  • MASH TL3 deflection: 0.99m.
  • Maintains the original G4 W-Beam deflection of 1.0m.
  • Introduces controlled release of the w-beam during a vehicle collision.
  • The elongated mounting slots of RocktBloc™ lifts the w-beam by up to 115mm.

Crash test evaluation

  • 2270kg Pick-up Truck travelling at 100km/h & 25 degrees (MASH 3-11)

Approved connections

  • G4 W-Beam Guardrail

RocketBloc™ FAQs

How does RocketBloc™ work?

RocketBloc™ achieves a controlled redirection of errant vehicles by regulating the force to release the rail throughout the impact zone, limiting dynamic deflection and to allow the C-post to collapse without tripping the vehicle.

RocketBloc™ attaches directly to the existing C-posts and features elongated mounting slots allowing the w-beam guardrail to be lifted to a height of 800mm above road level.

How is RocketBloc installed?

RocketBloc is retrofitted to existing G4 W-Beam using hand tools only. Dismantling of the w-beam rail or lifting or removal of the existing C-posts is not required.

Once the existing C-block is removed and replaced with the RocketBloc using standard fasteners, the w-beam rail is lifted to a height of 800mm above road level.

What are the dimensions of RocketBloc™?

RocketBloc™ is manufactured from 150x100x4mm RHS. The use of a closed section RHS for the manufacture of RocketBloc™ provides torsional strength, reducing the potential for the block to deform during a vehicle impact. Retaining shape during a vehicle collision is an important design consideration to maintain rail height and facilitate controlled release of the w-beam rail.

The 150mm width of RocketBloc™ maintains the same offset distance as the substituted C-blocking piece and therefore does not change the horizontal alignment of the safety barrier system.

What are the design benefits of RocketBloc?

The retrofitting of RocketBloc™ to existing G4 W-Beam elevates compliance to MASH TL3, demonstrating containment of a 2270kg pick-up truck travelling at 100km/h and 25 degrees.

What is the dynamic deflection of RocketBloc?

The MASH TL3 deflection results of RocketBloc™ when retrofitted to existing G4 W-Beam was 0.99m. Many G4 W-Beam installation adopt a design deflection of 1.0m. Therefore, the attachment of RocketBloc™ does not require additional space behind the barrier system to provide MASH TL3 compliance.

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