February 2021 |
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Product & Installation Manual: Sentry Barrier™
KEEPING
NZ SAFE
Installation
Getting Started
The Sentry Barrier™ is a W-Beam barrier
designed to run the length of need required
and is attached to a compatible terminal end or
crash cushion. The minimum Length of Need
(LoN) allowed is dependent on the post speed
limit. For a 100 km/hr zone a minimum LoN
of 30 metres is recommended, excluding the
proposed terminal end or crash cushion.
Preparation
Before installing an Sentry Barrier™, ensure
that all components required for the system are
on site and have been identified. The Sentry
Barrier™ is an engineered safety device. Before
starting installation ensure familiarity with the
makeup of the system. Refer to the Bill of
Materials and Parts Identification sections in this
manual for more information.
Ensure that the area where the Sentry Barrier™
is to be installed is sufficiently flat so that the
posts and W-Beam can be installed within the
allowable tolerance and aligned to the terminal
ends or crash cushions. Minor site grading may
be required.
Soil Conditions
The Sentry Barrier™ has been designed to
withstand a constant static load, thermal
loading, and dynamic impact load that can be
applied from the impact of an errant vehicle.
To perform, the Sentry Barrier™ must be
attached to either a semi rigid or rigid terminal
end or crash cushion to provide the necessary
safety benefits. It is recommended that the soil
tests are carried out at the location the Sentry
Barrier™ prior to being installed.
IF SOIL CONDITIONS ON SITE DO NOT MEET
OR EXCEED THE REQUIRED STRENGTH
DETAILED IN THIS MANUAL, SITE SPECIFIC
FOUNDATIONS MUST BE DESIGNED BY A
LOCAL GEOTECHNICAL ENGINEER.
