HammerBeam
HammerBeam combines the strength of thrie-beam guardrail with the yielding behaviour of the RamShield W-Beam post for longitudinal barrier installations along the edge of elevated structures such as culverts or bridges. The RamShield post is designed to collapse upon impact distinguishing it from heavier, rigid post systems which become problematic when attached to concrete structures. The yielding performance of the RamShield post reduces forces transferred to the elevated structure preventing damage and facilitating ease of repair.
Product Features
MASH TL3 Compliant
Containment of a 2270 kg pick-up truck travelling at 100 km/h
Leading Safety
Crash tested on the edge of an elevated concrete beam.
Superior Design
The yielding RamShield post prevents damage to the bridge or culvert structure.
Simplified Installation
Uses standard thrie-beam guardrails and RamShield posts.
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Product Manual
Product Data Sheet
Related Products
RamShield W-Beam has significantly advanced the containment level of guardrail by introducing patented technology into the behaviour of the post during impact.
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
The higher mounting position of the thrie-beam guardrail improves the system’s ability to contain and redirect large vehicles.
Frequently Asked Questions
What are the risks of installing rigid post systems?
Rigid posts barrier systems are susceptible to overloading the anchors when impacted by an errant vehicle. This can result in damage to the concrete structure which is problematic and a cause of corrosion. The life span of the structure may be comprised as steel reinforcement becomes damaged or exposed to atmospheric contaminants and water.
How does HammerBeam work?
HammerBeam combines the strength of thrie-beam guardrail with the yielding behaviour of the RamShield W-Beam post. The RamShield post is designed to collapse upon impact distinguishing it from heavier, rigid post systems which become problematic when attached to concrete structures. The yielding performance of the RamShield post reduces forces transferred to the elevated structure preventing damage and facilitating ease of repair.
What is the containment level of HammerBeam?
HammerBeam has been crash tested in accordance with MASH Test Level 3 (TL3).
What is the advantage of thrie-beam guardrail along the edge of an elevated structure
The triple corrugation design feature of thrie-beam provides numerous advantages when installed along the edge of an elevated structure:
- Lower deflection.
- Wider lateral catching area.
- Less prone to vehicles under-riding the system.
- Higher rail height providing improved stability for high-centre-of-gravity vehicle.
- Increased strength and capacity.
How are the side mount posts installed?
The side mount option features a bracket containing a recess for insertion of the RamShield post. Once the bracket is secured to the side of the structure, the standard length RamShield post is cut to the required length on site, and inserted into the recess.
Can HammerBeam be installed with surface mount posts?
Yes. HammerBeam may be installed with posts on baseplates secured to the top of an elevated concrete structure at sites where access to the side of the structure may be restrictive. The baseplate design and anchoring exceed the bending capacity of the RamShield post. Following a vehicle impact the damaged post is simply removed from the anchors and replaced.
Can HammerBeam be installed behind a kerb?
Yes. HammerBeam has been crash tested to MASH TL3 directly behind a 200 mm high hob. The hob featured a vertical face and crash testing was performed with both the 2270 kg pick-up truck and 1100 kg passenger car travelling at 100 km/h and 25 degrees. In both impact the test vehicles were safely contained and redirected satisfying all MASH criteria.
What is the spacing between HammerBeam posts?
The standard post spacing of HammerBeam posts is 2 m centres.
How does HammerBeam connect to w-beam guardrail barrier either side of the elevated structure?
The use of an asymmetric transition is required to connect thrie-beam to w-beam guardrail for installation of a guardrail end terminal or continuation of the safety barrier system. The asymmetric transition decreases the height of the system by 200 mm providing compatibility with RamShield W-Beam or MASH compliant end terminals.
What is the bending capacity of the RamShield post?
To assist designers, Safe Direction has undertaken RamShield post capacity analysis using LS-Dyna. Analysis has been undertaken for side-mounted posts and baseplate posts. Refer to the Product Manual for details.
