ET-SS Guardrail End Terminal

ET-SS Guardrail End Terminal

The MASH compliant ET-SS is the next generation of guardrail end terminal and is compliant to Test Level 3. The terminal is available for two installation methods, the primary method is with the posts driven into the ground via an hydraulic post driver. The alternative method is with baseplated posts anchored to a concrete footing, this is an option for the TL3 and TL2 configurations.

The MASH testing standard uses heavier vehicles and a wider range of impact angles for terminal testing, including 5˚ and 25˚ impacts. This results in a significant increase in impact energy when compared to the old NCHRP-350 terminal testing. The current Australian Standard AS/NZS 3845.1:2015 Road Safety Barrier Systems nominates MASH as the basis of testing procedures for road safety barrier systems.

The ET-SS system uses a proprietary head with front anchored technology to anchor the W-Beam from the loads exerted on the rail during an end-on or side vehicle impacts on the terminal. This front anchor also minimises the deflection of the downstream guardrail system to help contain and redirect an errant vehicle.

From end-on impacts within the MASH criteria, the W-Beam guardrail is flattened as it is guided through the head to the front anchor, this absorbs impact energy from the errant vehicle bringing it to a controlled and gradual stop.

The system has been fully crash tested to MASH TL3 and MASH TL2 as a re-directive, gating end terminal. 

Baseplated and Concrete Anchor Post Options

For locations where the posts cannot be driven to the appropriate depth due to an underground services conflict or similiar, a surface mounted option is available. This variant uses baseplated posts which are chemically anchored to a 250mm thick concrete pad. A concrete anchor post option is also available for locations where the 1.8m anchor post cannot be installed.