Ezy-Guard HC

Ezy-Guard HC

Minimum length depends on the design containment level and should first be checked using the Austroads design methods. Where geometric constraints prevent the full calculated length, the absolute minimum length of need based on crash testing is 20 metres for MASH TL3 and 26 metres for MASH TL4. These are generally treated as departures from the normal design domain and should be considered under the relevant Extended Design Domain requirements.

Yes, within limits. If underground services or an obstruction prevent a post at the standard 2 metre spacing, a single post can be omitted to create a 4 metre clear span. This increases deflection by about 11 percent if impacted at that location. For bidirectional traffic, that increased deflection applies for 4 metres either side of the omitted post. Only one such omission is permitted in any 30 metre run of Ezy Guard HC. If the conflict is short, you can also shift a post 1 metre upstream or downstream or use a base plated post on a suitable concrete foundation..

YEzy Guard HC can be installed on crossfalls up to 10H:1V. For TL3 containment, posts may be installed up to the rounding point on a 2H:1V batter, but this will usually fall within the Extended Design Domain and should be risk assessed. For TL4 containment, the offset from the face of rail to the hinge point should be at least equal to the expected deflection. In weak soil on a 2:1 embankment, the standard 1,030 millimetre embedment is suitable when posts are at least 500 millimetres from the rounding point. If installation is required within 500 millimetres, the embedment depth must increase to 1,350 millimetres using a longer Z post.

Yes. Because the Z post is designed to yield by bending near ground level, Ezy Guard HC is suitable for installation in rock, asphalt or concrete mowing strips when posts are installed in drilled holes and correctly backfilled. Where posts cannot be driven to the required depth, Ezy Guard HC can be mounted on base plates fixed to a suitable concrete foundation, which is common at culverts or over services. The footing design and use of base plated posts should always be agreed with the asset owner and follow the relevant Ingal drawings. If you are unsure about the foundation, a post pullover test or discussion with your local Ingal representative is recommended.

Yes, Ezy-Guard HC is fully crash tested to MASH TL4, meaning it safely contains and redirects a 10,000 kg truck at 90 km/h and 15 degrees. This provides a higher level of roadside protection than systems only compliant to TL3 or NCHRP-350 TL4.