Ezy-Guard 4
Ezy-Guard 4
Product Information Product Information
- Description DescriptionDescriptionThe Ezy-Guard 4 Safety Barrier is a cutting-edge steel guardrail system designed to provide superior motorist safety. Compliant with the latest MASH TL3 and NCHRP-350 TL4 standards, it offers enhanced protection, cost-effectiveness, and ease of installation.The system utilizes a proven W-Beam Guardrail secured to a sliding carriage mounted on a unique Z-Post. Unlike C-Post and open-profile post designs, the Z-Post is engineered to yield above ground upon impact, releasing the carriage and allowing the W-Beam rail to control and redirect errant vehicles safely and efficiently while minimizing ride-down deceleration forces.Features FeaturesFeatures• Crash tested and approved to MASH TL3 and NCHRP-350 TL4• Designed in accordance with AS/NZS 3845.1:2015 or AS/NZS 3845.2:2017 Road Safety Barrier Systems & Devices• Bi-directional performance for verge and median installations• Tested on 2H:1V batter slope with extended posts• Optional Ezy-Lift carriage for overlays up to +180mm• Rounded and shielded Z-Posts improve safety for pedestrians and motorcyclists• Installation in rock, asphalt, or on concrete mowing strips in accordance with guidance
- System Specifications System SpecificationsSystem Specifications• Z-Post Length:• Z-Post Mass:• Ezy-Guard 4 System Mass:• Rail Height Above Ground:• Z-Post Height Above Ground:• Post Spacing:• Ezy-Guard 4 System Width:• Z-Post Profile:• MASH TL3 Crash Test Deflection:1650mm12.5kg18.6kg per metre787mm777mm2000mm200mm90mm x 50mm1.65mVariants VariantsVariants• Median configuration (back-to-back) for bidirectional traffic.• Base plate installation for culverts and services• 6m span with post omission to provide clear openings without posts• Reduced post spacing for lower deflection• Ezy-Lift carriage to restore rail height after pavement overlays• Extended embedment depth for weak soils and batter slopesEnd Treatments End TreatmentsEnd TreatmentsTransitions TransitionsAttachments AttachmentsAttachments• Post Caps for additional safety in pedestrian and cyclist areas
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- How can I reduce the deflection of Ezy Guard 4 on a constrained site?View
You reduce deflection by tightening the post spacing. When the posts are placed closer together, the system becomes stiffer and moves less during an impact. At 100 km/h, dynamic deflection reduces from 1.57 metres at 2 metre spacing to 1.05 metres at 1 metre spacing and 0.73 metres at 0.5 metre spacing. If further reduction is required or you need guidance on selecting the right spacing, please contact your local Ingal representative.
- What is the minimum installation length?View
For MASH Test Level 2, with a 2,000 kg pick-up, the minimum length of Ezy Guard 4 between terminals is 12 m. For MASH Test Level 3, with a 2,270 kg pick-up, the minimum length between terminals is 20 m.
- Can I omit posts if there is an obstruction?View
- Can Ezy Guard 4 be installed near a batter hinge point?View
Yes, but the proximity to the batter hinge must be assessed under the road authority’s Extended Design Domain. Ezy Guard 4 has been crash tested to MASH TL3 with posts placed on the rounding point of a 2H:1V batter using AASHTO M147 65 Standard Soil. Designers should check ground suitability and any erosion before installation and use the maximum offset possible.
- What if I have weak soil?View
Ezy Guard 4 can be installed in weak soil, but the embedment depth may need to increase. In weak soil, the standard 873 mm embedment depth is suitable only when the barrier is at least 500 mm from the rounding point of a 2:1 batter. If the installation needs to be placed within 500 mm of the rounding point, the embedment depth must increase to 1,050 mm. A longer Z post is available for this situation. Any installation close to a batter slope should also follow the Extended Design Domain requirements of the road authority.
