CSP Products SENTRY BARRIER TL-4 User manual

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Roadside Workplace Roadwork Pedestrian Seeing Environment Telecoms
SENTRY BARRIER™ TL-4
THRIE-BEAM SYSTEM
Longitudinal MASH TL-4 Barrier
Product and Installation Manual
Please call CSP®
on 0800 655 200 or visit
www.csppacic.co.nz for more information
November 2020
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Product & Installation Manual: Sentry Barrier™ TL-4 Thrie-Beam System
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Table of contents
Introduction
System Overview
Limitations and Warnings
Training
Health and Safety
Before Installation
Safety statements
General Safety
Sentry Barrier™ TL-4 Thrie-Beam System Safety Statements
Limited Warranty
System Design and Design Considerations
Kerbs
Slopes
Batter Hinge Proximity
Horizontal and Vertical Curves
Undulating Ground Conditions
Clear Zone / Hazard Free Zone
Terminal Ends
Soil Condition
Post Load Testing
Length of Need
System Deection
Transitions
Parts Identication
Bill of Materials
Installation
Getting Started
Preparation
Soil Conditions
4
5
6
6
7
8
8
8
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10
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Tools Required
Installation Tolerances
Installation Instructions
Site Preparation
Post Orientation with trafc ow direction
Construction of Terminal End or Crash Cushion
Installation Procedure (Posts and Thrie-Beam)
Inspection and Maintenance Frequency
Maintenance Requirement for Repair After a Bushre
Installation Checklist
Frequently Asked Questions
Appendices
Appendix A – Sentry Barrier™ TL-4 Thrie-Beam System
Appendix B – Sentry Barrier™ Post TL-4
Appendix C – Installation Tolerance
Appendix D – Sentry Barrier™ TL-4 Thrie-Beam Transition to Sentry Barrier W-Beam
Appendix E – Sentry Barrier™ TL-4 Thrie-Beam Transition to MAX-Tension TL-2 Terminal
Appendix F – Sentry Barrier™ TL-4 Thrie-Beam Transition to MAX-Tension TL-3 Terminal
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19
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31
32
CSP®may make changes to this Product Manual from time to time. Please check the CSP®
website prior to using this Product Manual to ensure that you have the latest version.

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Product & Installation Manual: Sentry Barrier™ TL-4 Thrie-Beam System
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Introduction
The Sentry Barrier™ TL-4 Thrie-Beam System
is a roadside Thrie-beam guardrail system
suitable for containing, redirecting and shielding
vehicles from roadside obstacles. The barrier
has been designed and tested to meet the
evaluation criteria of MASH Test Level 4 for a
longitudinal barrier. This is the current state
of the art performance criteria, exceeding the
requirements of NCHRP 350 Test Level 4.
The Sentry Barrier™ TL-4 Thrie-Beam System
has an initial installation height of 1050 mm
to the top of the rail, providing the system
with the ability to withstand numerous road
surface overlays without the need to relevel of
lifting of the barrier. The Sentry Barrier™ TL-4
Thrie-Beam System can be installed with an
approved energy absorbing terminal end on the
approach end, however it is recommended that
an approved tangential or ared MAX-Tension™
terminal end be used for optimal performance.
The rounded edges to the Sentry Barrier™
Post TL-4 and closed shape on the approach
direction provide increased protection for
vulnerable road users. The compact Sentry
Barrier™ Post TL-4 are easy to drive into all
soil types and provide increased resistance to
rotation in the soil when impacted. Unlike other
systems on the market, any damage caused
to the top of the posts or to the rail mounting
points during installation will not affect the
performance of the system.
The connection system between the rail and
posts is formed using conventional fasteners
providing it with the greatest tolerance of any
system on the market. If the connection is
damaged in any way it can be easily replaced
without replacing the posts allowing for simpler
installations and repairs. The Sentry Barrier™
TL-4 Thrie-Beam System is installed quickly
using conventional installation tools and
equipment.

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System Overview
The Sentry Barrier™ TL-4 Thrie-Beam System
is designed to provide acceptable structural
adequacy, minimal occupant risk and safe
vehicle trajectory as required by the latest in
safety standards, AASHTO MASH 16 Test Level
4 (TL4). This standard requires the system to be
independently evaluated with full scaling testing
using 1,100 kg and 2,270 kg vehicles traveling
at speeds of 100 km/hr and impacting the
system at an angle of 25 degrees, as well as a
10,000 kg truck travelling at 90 km/hr impacting
the system at an angle of 15 degrees. The
requirements of MASH 16 TL4 are so stringent
that the system is required to absorb more
energy during the impact than the out-dated
NCHRP 350 standard Test Level 4 (TL4).
When impacted by an errant vehicle, the Sentry
Barrier™ TL-4 Thrie-Beam System will redirect
the vehicle along the face of the barrier system,
bringing it to a controlled stop. The system has
been developed to produce no debris during an
impact, with all posts designed to remain rmly
located in the soil and the connection details
to remain attached to the rail. Repair of the
system is completed by removing and replacing
any bent or damaged Thrie-Beam and posts
impacted accordingly.
Any posts with damaged connections can be
repaired by replacing the connection hardware
only, reducing the need to remove posts and
repair damaged ground.
Key specications for the Sentry Barrier™ TL-4
Thrie-Beam System are:
The minimum Length of Need (LON) of the
Sentry Barrier™ TL-4 Thrie-Beam System is
dependent on the posted speed limit. Please
refer to state roading authority approval
letters for local minimum length requirements.
However, a minimum length of need for a two-
way road with a posted speed limit of 100 km/
hr with a clear zone of approaching trafc is
recommend as 86 m, excluding terminal ends.
The Sentry Barrier™ TL-4 Thrie-Beam System
systems rails and posts are manufactured from
hot-rolled steel at products in accordance
with AS/NZS 1594 and hot-dip galvanised in
accordance with AS/NZS 4680 with an average
minimum coating thickness of 35 microns.
All galvanising is undertaken after fabrication
is completed to ensure no surfaces are left
untreated.
System width 200 mm
Height to top of rail 1050 mm
Height to top of post 1040 mm
Post weight 20.5 kg
Post length 2.00 m
Post spacing 2.00 m
MASH TL4.10 dynamic deection
(1,100 kg vehicle) 1.06 m
MASH TL4.11 dynamic deection
(2,270 kg vehicle) 1.45 m
MASH TL4.12 dynamic deection
(10,000 kg vehicle) 1.53 m

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Limitations and Warnings
The Sentry Barrier™ TL-4 Thrie-Beam System
forms part of an approved roadside protection
system and it must be installed in conjunction
with an approved terminal end system on
both the approach and trailing ends. When
installed in accordance with the manufacturer’s
instruction the barrier system allows an
impacting vehicle to be re-directed in a safe and
predictable manner under the MASH impact
conditions.
Vehicle impacts that vary from the MASH impact
conditions for longitudinal barriers may result
in signicantly different outcomes from those
obtained in the experimental testing and may
not meet the MASH evaluation criteria.
The selection and placement of the Sentry
Barrier™ TL-4 Thrie-Beam System must be
in accordance with the Roading Controlling
Authorities guidelines and the details shown
in the construction drawings. Installation must
be within strict accordance with the installation
instructions for the product. Alternative
installation techniques will be required if the soil
conditions on site do not meet the minimum
requirements stated in this manual.
Training
Installers may choose to undergo formal training
on the installation of the Sentry Barrier™
TL-4 Thrie-Beam System if they have no prior
experience with Sentry Barrier™. This includes
the correct identication of each Sentry
Barrier™ TL-4 Thrie-Beam System components
and installing it as per the product specication
and Installation Manual.
By the end of the training installers will be
able to identify each component of the Sentry
Barrier™ TL-4 Thrie-Beam System and have the
knowledge to safely install the barrier as per the
Installation Manual and Specications required.
The training will cover and include the correct
Personal Protective Equipment (PPE) required
to be worn during installation and maintenance.
Additionally, by the end of the training workers
will know the correct methods required to
handle and install all components of the Sentry
Barrier™ TL-4 Thrie-Beam System.

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Health and Safety
Installers should comply with all necessary
health and safety legislation in the local
jurisdiction, including all safe work and lifting
practices.
All appropriate trafc safety precautions must
be adopted. All workers must wear the required
safety clothing, including but not limited to, high
visibility vests, steel capped footwear, gloves
and protective glasses etc.
Before undertaking any earth works, including
drilling or driving of posts, always check with
the appropriate service providers that the area is
clear of underground services
All installers must be well clear of machinery
when posts are being driven.

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Before Installation
Design, selection and placement of the Sentry
Barrier™ TL-4 Thrie-Beam System shall be in
accordance with the local Road Controlling
Authority’s guidelines and as per the details
shown in the construction drawings. Installation
shall be in accordance with the installation
instructions supplied for this product.
The Sentry Barrier™ TL-4 Thrie-Beam System
is an engineered safety device. Before starting
installation ensure familiarity with the makeup of
the system.
Note: Soil conditions may require a local
geotechnical engineer to conrm the soil
condition on site met the required condition
described in the manual.
Safety statements
General Safety
>All required trafc safety precautions should
be complied with. All workers should wear
required safety clothing (examples, but not
limited to, include: high visibility vests, steel
capped footwear, gloves etc).
>Only authorised trained personnel should
operate any machinery. Where overhead
machinery is used, care must be taken to
avoid any overhead hazards.
>Before drilling or excavation always ensure
that the area is clear of underground
services. The appropriate service providers
may need to be contacted.
Sentry Barrier™ TL-4 Thrie-Beam System
Safety Statements
>All installers must be a safe distance from all
drilling or excavating machinery operating.
>The components are not heavy enough to
require specialised lifting equipment (note:
check your local OH&S procedures on lifting
weights), but due to the dimensions and
bulky nature, care should be taken when
lifting the larger components into position.
>Avoid placing hands or ngers in and around
moving machine parts when components
are being lifted and manoeuvred into place.

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Limited Warranty
CSP Pacic (CSP) has tested the impact
performance of its barrier systems and crash
cushion systems, and other highway safety
hardware under controlled conditions, however,
CSP does not represent nor warrant that the
results of those controlled conditions would
necessarily avoid injury to persons or property.
TO THE MAXIMUM EXTENT PERMITTED
BY LAW, CSP EXPRESSLY DISCLAIMS
ANY WARRANTY OR LIABILITY FOR
CLAIMS ARISING BY REASONS OF DEATH
OR PERSONAL INJURY OR DAMAGE TO
PROPERTY RESULTING FROM ANY IMPACT,
COLLISION OR HARMFUL CONTACT WITH
THE PRODUCTS OR NEARBY HAZARDS OR
OBJECTS BY ANY VEHICLE, OBJECTS OR
PERSONS.
CSP warrants that any product or component part
manufactured by CSP will be free from defects in
material or workmanship. CSP will replace free of
cost any product or component part manufactured
by CSP that contains such a defect.
TO THE MAXIMUM EXTENT PERMITTED
BY LAW, CSP EXPRESSLY DISCLAIMS THE
FOREGOING WARRANTY IS IN LIEU OF AND
EXCLUDES ALL OTHER WARRANTIES NOT
EXPRESSLY SET FORTH HEREIN, WHETHER
EXPRESS OR IMPLIED BY OPERATION OF
LAW OR OTHERWISE, INCLUDING BUT NOT
LIMITED TO ANY IMPLIED WARRANTIES
OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE. CSP’S LIABILITY
UNDER THIS WARRANTY IS EXPRESSLY
LIMITED TO REPLACEMENT FREE OF
COST OF PARTS SUPPLIED BY CSP ONLY
(IN THE FORM AND UNDER THE TERMS
ORIGINALLY SHIPPED), OR TO REPAIR OR
TO MANUFACTURE BY CSP, PRODUCTS
OR PARTS NOT COMPLYING WITH CSP
SPECIFICATIONS, OR, AT CSP’S ELECTION, TO
THE REPAYMENT OF AN AMOUNT EQUAL TO
THE PURCHASE PRICE OF SUCH PRODUCTS
OR PARTS, WHETHER SUCH CLAIMS ARE FOR
BREACH OF WARRANTY OR NEGLIGENCE.
CSP SHALL NOT BE LIABLE FOR ANY
INCIDENTAL, CONSEQUENTIAL OR SPECIAL
LOSSES, DAMAGES OR EXPENSES OF ANY
KIND, INCLUDING, WITHOUT LIMITATION,
ANY SUCH LOSSES, DAMAGES OR EXPENSES
ARISING DIRECTLY OR INDIRECTLY FROM
THE SALE, HANDLING OR USE OF THE
PRODUCTS FROM ANY OTHER CAUSE
RELATING THERETO, OR FROM PERSONAL
INJURY OR LOSS OF PROFIT.
Any claim by the Buyer with reference to Products
sold hereunder for any cause shall be deemed
waived by the Buyer unless CSP is notied in
writing, in the case of defects apparent on visual
inspection, within ninety (90) days from the delivery
date, or, in the case of defects not apparent on
visual inspection, within twelve (12) months from
the said delivery date. Products claimed to be
defective may be returned prepaid to CSP’s plant
for inspection in accordance with return shipping
instructions that CSP shall furnish to the Buyer
forthwith upon receipt of the Buyer’s notice of claim.
If the claim is established, CSP will reimburse that
Buyer for all carriage costs incurred hereunder.
The forgoing warranty benets shall not apply to (i)
any Products that have been subject to improper
storage, accident, misuse or unauthorised
alterations, or that have not been installed,
operated and maintained in accordance with
approved procedures and (ii) any components
manufactured by the Buyer.
The customer acknowledges that it has acquired
the Goods for the purposes of a business and that
the Consumer Guarantees Act 1993 will not apply
to the supply of the Goods by CSP to it.

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System Design and Design
Considerations
Kerbs
As with all road side safety hardware, the
Sentry Barrier™ TL-4 Thrie-Beam System has
been designed and tested so that the centre of
gravity of the impacting vehicle is at a constant
height in relation to the system. For this reason,
it is preferred that kerbs or channels are not
in front or directly behind the Sentry Barrier™
TL-4 Thrie-Beam System as they may result in
altering the height of the vehicle at impact.
If interaction with a kerb cannot be avoided
consult the local Road Controlling Authority
guidelines regarding allowable kerb- heights,
kerb shapes, and barrier offset distance.
Slopes
The Sentry Barrier™ TL-4 Thrie-Beam System
can be installed on ground with a maximum
cross fall of 6H:1V. For steeper slopes it is
recommended that the system is installed no
closer than 400 mm to the batter hinge point of
the slope, please refer to below for guidance.
If installations with less clearance are required,
please contact your CSP®.
Batter Hinge Proximity
The offset proximity of the Sentry Barrier™ TL-4
Thrie-Beam System to the batter hinge point of a
slope is dependent upon the design containment
level of the road. For a TL-3 containment level,
the minimum proximity to the hinge point shall
be minimum 400 mm from the back edge of the
post to the Batter Hinge Point as shown in the
gure below. For a TL-4 containment level, the
minimum proximity to the hinge point measured
from the face of the rail, shall be equal to the
expected deection at TL-4, which is 1530 mm.
Refer to below gure for guidance.
Installations in proximity to a batter hinge
point should also be considered within the
requirements of the road controlling authority
Extended Design Domain requirements, where
applicable.
Horizontal and Vertical Curves
The Sentry Barrier™ TL-4 Thrie-Beam System
can accommodate both horizontally and
vertically curved guardrail panels if required
by site conditions. For radii less than 25m the
system must be anchored with an approved
intermediate anchor or terminal end. Please
refer to approved details of the local Road
Controlling Authority where necessary.
Concave
corner
Convex
corner

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Undulating Ground Conditions
Site specic grading may be necessary to
ensure that there are no ‘humps’ or ‘hollows’
that may signicantly alter the impacting
vehicles stability or substantially alter the
Thrie-Beam heights in relation to the ground.
The Sentry Barrier™ TL-4 Thrie-Beam System
is required to be installed level and centred
on the barrier line as stated in the Installation
Procedure.
Care must be taken to ensure all posts in the
Sentry Barrier™ TL-4 Thrie-Beam System
are installed to the correct height, alignment
and orientation. It is strongly recommended
that smoothing of uneven ground conditions
be completed along the length of the Sentry
Barrier™ TL-4 Thrie-Beam System.
Clear Zone / Hazard Free Zone
Clear Zones are areas adjacent to trafc 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 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 conrmation of the minimum width
requirements.
Terminal Ends
The Sentry Barrier™ TL-4 Thrie-Beam System
is designed to be compatible with a range of
guardrail terminals ends or crash cushions
available, in accordance with designated
transition details. It is recommended that MAX-
Tension™ Terminal End be used with the Sentry
Barrier™ TL-4 Thrie-Beam System for optimal
performance. The X-350 Terminal End can also
be utilised if required. Refer to the Appendices
section for detailed drawings.
The purpose of the 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 terminal ends
and crash cushions also provide tensile and
deection strength necessary to ensure the
errant vehicle is redirected for the length-of-
need required.
>Care must be taken to ensure the correct
post spacing is ALWAYS used during the
installation.
>Care must be taken to ensure the posts are
orientated correctly during installation and to
ensure all Thrie-Beam bolts are inserted and
tightened accordingly.
>Care must be taken to ensure the line posts
are installed at the correct height.

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Soil Condition
The Sentry Barrier™ TL-4 Thrie-Beam System
is a soil-mounted system driven directly into
the soil. To meet the barrier’s performance, the
soil is required to meet AASHTO Standard Soil
(Grade B) and requirements set out by AS/NZS
3845 and (if applicable) TNZ Specication M/4
2006.
Additionally, you should refer to the local
Roading Controlling Authorities guidelines for
minimum soil requirements for road safety
barrier installation.
Soil conditions on site that do not meet these
requirements will require alternative installation
or further investigation. Contact CSP®for
guidance.
It is strongly recommended that soil tests be
completed at the location where the Sentry
Barrier™ TL-4 Thrie-Beam System is to be
installed.
Post Load Testing
To ensure soil conditions on site meet the
required resistance in the ground for the system
to perform adequately. A Sentry Barrier™ TL-4
post should be installed at the required site
location and pull tested.
The method involves applying a 5KN (510kg.f)
force at 700mm above ground level using a
soft strop or similar, capable of sustaining such
force. The maximum permanent post deection
allowable onsite is 5mm (+5mm) horizontally
at the ground level. Therefore, the tolerance
allowable is 0-10mm.
Note: All technical information required to assist
in designing a site-specic foundation is available
from CSP®.
IF SOIL CONDITIONS ON SITE DO NOT MEET
OR EXCEED THE REQUIRED STRENGTH,
SITE SPECIFIC CONDITIONS, REFER TO A
LOCAL GEOTECHNICAL ENGINEER FOR
FURTHER ADVICE.

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Length of Need
The minimum Length of Need (LoN) of the
Sentry Barrier™ TL-4 Thrie-Beam System
is dependent on the specic hazard being
protected and the posted speed limit. The
default Length of Need (LoN) determined
through crash testing is 86.0m excluding
transitions and terminal ends, however, refer to
state roading authority approval letters for local
minimum length requirements where applicable.
Designers should also refer to the Austroads
Guide to Road Design – Part 6, Section 6.3, for
detailed design process of barrier length run
required.
For sites where geometric constraints exist,
designers may require shorter length of need,
in such instances, a 12m* length of need for
TL-3 containment design can be utilised plus
the length of the transition and terminal end
regions on either end of the barrier system. For
TL-4 containment design, a 20m* length of need
can be utilised plus transition and terminal end
regions. We recommend designers or Installers
contact their local Roading Control Authority for
further information or guidance if required.
*These lengths have been calculated based
upon the actual vehicle contact lengths from the
respective Test 4-11 and Test 4-12 crash test
articles noted in the crash test report.

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System Deflection
The transverse deection of a barrier during
a crash is dependent upon the mass, speed,
and impact angle of the errant vehicle. The
maximum levels of dynamic deections
measured during impact testing are presented
below.
Crash testing typically represents the extremes
impact parameters. A review of the proposed
barrier location can be undertaken to assess
the following variables inuence on the likely
maximum system deection;
>Maximum attainable impact angle;
>Design speed; and
>Design vehicle.
Note:
The TL-3 containment level is measured in
Test 4-11 i.e. Dynamic Deection of 1.45m.
The TL-4 containment level is measured in
Test 4-12 i.e. Dynamic Deection of 1.53m
Transitions
A transition zone may be required to connect
the Sentry Barrier™ TL-4 Thrie-Beam System to
other types of barriers or non-approved terminal
ends. Refer to the Appendices section for
guidance. Please contact CSP®for guidance on
acceptable transition systems if required.
The Sentry Barrier™ TL-4 Thrie-Beam System
can be connected to approved proprietary or
public domain terminal ends through a transition
zone. Refer to the Appendices section for
designated transition drawings.
Test 4-10 Test 4-11 Test 4-12
Vehicle type Car Pick up Truck
Vehicle
mass 1,100 kg 2,270 kg 10,000 kg
Vehicle
speed 100 km/h 100 km/h 90 km/h
Impact
angle 25° 25° 15°
Dynamic
deection 1.06 m 1.45 m 1.53 m

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Parts Identification
ALL STEEL COMPONENTS USED IN THE SENTRY BARRIER™ TL-4 THRIE-BEAM SYSTEM
ARE HOT DIPPED GALVANISED IN ACCORDANCE WITH AS/NZS 4680 (AVERAGE MINIMUM
COASTING THICKNESS SHOULD BE 35 MICRONS) WITH THE EXCEPTION OF THE ACP
SENTRY BARRIER WASHER BEING SPUN GALVANISED.
Sentry Barrier™ TL-4 Thrie-Beam System Post (2 views)
Sentry Barrier™
Bolt, Washer & Nut
Thrie-Beam
Splice, Bolt & Nut

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Bill of Materials
Checklist per panel (4 m of barrier) installed Yes
2x Sentry Barrier™ TL-4 Thrie-Beam System Posts (per Thrie-Beam)
2x Sentry Barrier™ Bolt, Washer and Nut (one per post connection)
1x 4 m Thrie-Beam
12x Splice Bolts and Nuts (at the end of Thrie-Beam and overlapping the prior Thrie-Beam)
General equipment required
Drilling or compactor suitable for foundation
String line and pegs
Measuring tape
Level
32 mm Wrench
32 mm Ring Spanner
Suitable driving head with machined Sentry post prole

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Installation
Getting Started
The Sentry Barrier™ TL-4 Thrie-Beam System
is a Thrie-Beam barrier designed to run the
length of need required and is attached to
a compatible terminal end or crash cushion
through a designated transition, refer to the
Appendices section. For guidance on minimum
Length of Need (LON), refer to the Length of
Need section earlier in the manual.
Preparation
Before installing an Sentry Barrier™ TL-4 Thrie-
Beam System, ensure that all components
required for the system are on site and have
been identied. The Sentry Barrier™ TL-4 Thrie-
Beam System is an engineered safety device.
Before starting installation ensure familiarity with
the makeup of the system. Refer to the Bill of
Materials and Parts Identication sections in this
manual for more information.
Ensure that the area where the Sentry Barrier™
TL-4 Thrie-Beam System is to be installed is
sufciently at so that the posts and Thrie-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™ TL-4 Thrie-Beam System
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™ TL-4 Thrie-Beam System
must be attached to either a semi rigid or rigid
terminal end or crash cushion after a designated
transition region to provide the necessary
safety benets. It is recommended that the soil
tests are carried out at the location the Sentry
Barrier™ TL-4 Thrie-Beam System 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.

November 2020 | Page 18Ph 0800 655 200 or visit www.csppacific.co.nz
Product & Installation Manual: Sentry Barrier™ TL-4 Thrie-Beam System
KEEPING
NZ SAFE
Tools Required
The tools required to install the Sentry Barrier™
TL-4 Thrie-Beam System are similar to other
Thrie-Beam barriers. It requires:
Appropriate personal protective equipment
Drilling or compactor machinery (suitable for
soil conditions and with a driving head to avoid
damage to posts during installation)
String line
Measuring tape
Level
32mm Socket wrench or Ratchet
32mm Ring spanner

November 2020 | Page 19Ph 0800 655 200 or visit www.csppacific.co.nz
Product & Installation Manual: Sentry Barrier™ TL-4 Thrie-Beam System
KEEPING
NZ SAFE
Installation Tolerances
The Sentry Barrier™ TL-4 Thrie--Beam System
is an engineered safety device. To obtain
optimal performance is it important to install
all components of the system to within the
allowable tolerances stated below (also in
Appendix C). Particular care must be taken to
ensure;
>Suitable horizontal alignment and verticality
of the line posts.
>Consistency in the vertical height of the line
posts.
>Orientation and height of the terminal end.
Sentry Barrier™ TL-4 Thrie-Beam System has
to be installed at 1040mm to the top of the
post. A vertical height tolerance of ±25mm is
acceptable for both the Sentry Barrier™ Post
TL-4. The top of the Thrie-Beam is to be
positioned 10mm above the top of the Sentry
Barrier™ Post TL-4 with a tolerance of ±5mm.
The Sentry Barrier™ Post TL-4 laterally is
constrained to ±15mm tolerance. It is of upmost
importance for these tolerances to be adhered
to in order to ensure safe function of the Sentry
Barrier™ TL-4 Thrie-Beam System.

November 2020 | Page 20Ph 0800 655 200 or visit www.csppacific.co.nz
Product & Installation Manual: Sentry Barrier™ TL-4 Thrie-Beam System
KEEPING
NZ SAFE
Installation Instructions
Before installing the Sentry Barrier™ TL-4
Thrie-Beam System, ensure that all components
required for the system are on site and have
been identied. The Sentry Barrier™ TL-4
Thrie-Beam System is an engineered safety
device made up of relatively small number of
parts. Please ensure familiarity with the makeup
of the system and the installation process prior
to commencing. If required, refer to the Bill of
Materials and Parts Identication sections in this
manual for more information.
Site Preparation
It is preferred that the Sentry Barrier™ TL-4
Thrie-Beam System be installed on at, level
ground and tethered to an approved terminal
end or crash cushion. The positioning of the
Sentry Barrier™ TL-4 Thrie-Beam System
commences from the last post connected to
the asymmetric transition rail (on Thrie-Beam
end), working upstream to the prior asymmetric
transition rail. It is recommended that a string
line be used to obtain the correct orientation
and placement of the posts.
Post Orientation with traffic flow direction
Ensure posts are correctly orientated in relation
to trafc ow direction by positioning the closed
side of the post towards oncoming trafc. Refer
to below.
BEFORE DRILLING OR EXCAVATION
ALWAYS ENSURE THAT THE AREA IS CLEAR
OF UNDERGROUND SERVICES.