February 2021 |
Page
9
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Product & Installation Manual: Sentry Barrier™
KEEPING
NZ SAFE
Weak Soil Installations
Sentry Barrier™ has been R & D crash tested
to MASH TL-3 for installation in weak soil
in accordance with the AASHTO weak soil
classification. When installed in weak soil with
the 2100 mm long Sentry Post, the 1310 mm
embedment depth of the longer Sentry Post
is sufficient to support the system’s overall
performance in this scenario. See figure below.
The 2100mm long Sentry Posts are available from
CSP
®
for these applications. Installations in weak
soils should be considered within the requirements
of the Road Controlling Authority Extended Design
Domain requirements. Contact CSP
®
for any
further guidance and information if required.
Posts on Base Plates
In the event that the Sentry Barrier™ cannot be
installed to the required in-ground depth, the use
of a base plate mounted on a suitable foundation
can be adopted. Posts on base plates are
typically used at culvert locations, and in areas
where underground services restrict posts from
being driven into the ground. Refer to Appendix
G – SENTRY W-BEAM BARRIER BASE PLATE
OPTION. Contact CSP
®
for any further guidance
and information if required.
