February 2021 |
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11
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Product & Installation Manual: Sentry Barrier™
KEEPING
NZ SAFE
Clear Zone / Hazard Free Zone
Clear Zones are areas adjacent to traffic lanes
that provide errant vehicles the opportunity to
slow down or recover. The clear zone must be
kept clear from roadside features that could be
hazardous to an errant vehicles, such as but not
limited to trees, poles and culverts. Although
it is desirable to maximize the available clear
zone, please refer to your local Road Controlling
Authority for confirmation of the minimum width
requirements.
Terminal Ends
The Sentry Barrier™ is designed to be
compatible with a range of w-beam guardrail
terminals ends or crash cushions available
in the public domain. It is recommended that
MAX-Tension™ End Terminal be used with the
Sentry Barrier for optimal performance. Refer to
Appendix F – Sentry Barrier™ TRANSITION TO
MAX-Tension™ End Terminal.
The purpose of the W-Beam guardrail terminals
ends or crash cushions is to provide a soft
impact and to prevent the end rail from spearing
or impacting the errant vehicle. The terminals
ends and crash cushions also provide tensile
and deflection strength necessary to ensure the
errant vehicle is redirected for the length-of-
need required.
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Care must be taken to ensure the correct
post spacing is ALWAYS used during the
installation.
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Care must be taken to ensure the posts are
orientated correctly during installation and to
ensure all W-Beams bolts are inserted and
tightened accordingly.
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Care must be taken to ensure the line posts
are installed at the correct height.
