RamShield Low Deflection
RamShield Low Deflection combines the sectional strength of C-posts with w-beam guardrail to reduce the clearance required between the barrier and roadside hazard, an important design consideration for installation on narrow formations. RamShield Low Deflection achieves a controlled redirection of errant vehicles by regulating the force to release the guardrail throughout the impact zone, limiting dynamic deflection and to allow the C-post to collapse without tripping the vehicle.
The installation of RamShield Low Deflection may be configured with or without blocking pieces providing design flexibility.
Crash Test Evaluation
Barrier Configuation
Vehicle Type
Vehicle Mass
impact speed
impact angle
impact energy
Dynamic Deflection
Posts at 2m Centres
no Blocking Pieces
Posts at 2m Centres
with Blocking Pieces
Barrier Configuation
Posts at 2m Centres
no Blocking Pieces
Vehicle Type
Vehicle Mass
impact speed
impact angle
impact energy
Dynamic Deflection
Barrier Configuation
Posts at 2m Centres
with Blocking Pieces
Vehicle Type
Vehicle Mass
impact speed
impact angle
impact energy
Dynamic Deflection
Installation
Post Type
Standard Post Spacing
Post Embedment
Beam Type
System Height
Driven Post
2.0 m
890 mm
W-Beam
800 mm
Post Type
Driven Post
Standard Post Spacing
2.0 m
Post Embedment
890 mm
Beam Type
W-Beam
System Height
800 mm
Product Features
MASH TL3 Compliant
Containment of a 2270 kg pickup truck travelling at 100 km/h and 25 degrees.
Low Dynamic Deflection
Suitable for shielding hazards located close to the edge of the roadway.
Innovative Design
Available with or without blocking pieces.
Australian Designed
Intellectual property developed and owned by Safe Direction.
Product Gallery
Downloads
Product Manual
Product Data Sheet
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Frequently Asked Questions
What is the definition of dynamic deflection?
Dynamic deflection is the maximum lateral movement of a road safety barrier system when struck by a vehicle during crash testing. It represents how far the barrier deflects or bends under impact, measured from its original position to the furthest point displaced during collision.
When would I specify RamShield Low Deflection?
RamShield Low Deflection has been developed to shield roadside hazards that are located close to the edge of the roadway. The low deflection result reduces the required distance between the barrier and the roadside hazard.
What configuration variants are available with RamShield Low Deflection?
RamShield Low Deflection may be installed with the w-beam guardrail mounted directly onto the C-posts creating a narrow width system. Alternately the system may be installed with spacer blocks, known as a RamBlocs, positioned between the w-beam rail and C-posts.
What is the advantage of installing blocking pieces?
The installation of blocking pieces allows the face of the w-beam guardrail to be offset from the C-post, an important design consideration when accommodating the alignment of drainage or edge of asphalt beneath the safety barrier system.
What is the standard width of the RamBloc?
The standard width of a RamBloc is 150 mm. The RamBloc is manufactured from rectangular hollow section providing torsional strength.
Can the RamBloc be supplied in varying widths?
Yes. RamBlocs are available in widths of 200 mm, 250 mm and 300 mm providing design flexibility. The increased width of the RamBloc does not change the system dynamic deflection or vehicle stability during impact.
What is the containment level of RamShield Low Deflection?
RamShield Low deflection with and without blocking pieces has been crash tested in accordance with MASH Test Level 3 (TL3).
Can RamShield Low Deflection be installed with closer post spacing to reduce dynamic deflection?
Yes. At constrained sites where the available clearance between the barrier and hazard is limited and insufficient to accommodate the standard barrier deflection, the spacing of the posts may be reduced to 1.0 m centres. Please refer to the Product Manual and Drawings for design guidance.
Can RamShield Low Deflection posts be installed on a concrete strip footing?
Yes. In circumstances where an underground service or obstruction prevents the RamShield Low Deflection system from being installed with posts driven into the ground, a concrete strip footing may be constructed to accommodate posts with base plates. Please refer to the Product Manual and Drawings for design guidance.
Can RamShield Low Deflection be installed with a motorcycle protection barrier?
Yes. RamShield Low Deflection may be installed with BikerShield which is positioned beneath the w-beam guardrail and prevents a dismounted motorcyclist from contacting the supporting posts of the guardrail barrier. The BikerShield spring brackets attach directly to the w-beam mid-span between posts and absorb the impact energy of the sliding rider. Please refer to the Product Manual and Drawings for design guidance.
