Trinity Highway REACT 350 II User manual

REACT 350
®
is a registered trademark of Energy Absorption Systems, Inc. Part No. 618083
© 2020 Trinity Highway Products, LLC
TrinityHighway.com 1 Revision E November 2020
REACT 350
®
II
The REACT 350
®
II has been tested pursuant to National Cooperative Highway Research Program
(“NCHRP”) Report 350 specifications. The REACT 350
®
II has been deemed eligible for federal-aid
reimbursement on the National Highway System by the Federal Highway Administration (“FHWA”).
Product Description Assembly Manual
15601 Dallas Parkway
Suite 525
Addison, Texas 75001
Warning: The local highway authority, distributors, owners, contractors,
lessors, and lessees are RESPONSIBLE for the assembly, maintenance, and
repair of the REACT 350
®
II. Failure to fulfill these RESPONSIBILITIES with
respect to the assembly, maintenance, and repair of the REACT 350
®
II could
result in serious injury or death.
Important: These instructions are for standard assemblies specified by the
appropriate highway authority. In the event the specified system assembly,
maintenance, or repair would require a deviation from standard assembly
parameters, contact the appropriate highway authority engineer.
This manual must be available to the worker overseeing and/or assembling the product at
all times. For additional copies, contact Trinity Highway directly at [phone] or visit
TrinityHighway.com.
The information contained in this manual supersede all previous versions. The instructions,
illustrations, and specifications are based on the latest REACT 350
®
II information available to
Trinity Highway at publication. We reserve the right to make changes at any time. Please visit
TrinityHighway.com/Product/REACT-350-II/ to confirm the latest revision.

TrinityHighway.com 2 Revision E November 2020
Table of Contents
Customer Service Contacts ..........................................................................................................3
Important Introductory Notes ........................................................................................................3
Safety Symbols .............................................................................................................................4
Safety Rules for Assembly............................................................................................................4
Limitations and Warnings..............................................................................................................5
System Overview ..........................................................................................................................6
Foundation/Anchoring...................................................................................................................7
Trinity Highway Approved Adhesive Anchoring System ...............................................................8
Anchor Assemblies....................................................................................................................8
Anchor Assembly Cautions .......................................................................................................9
Recommended Tools..................................................................................................................10
Know Your REACT 350®II System.............................................................................................12
Backup Type ...........................................................................................................................14
System Design............................................................................................................................15
Self-Contained Backup............................................................................................................15
Bidirectional Traffic..................................................................................................................16
Offsetting the System ..............................................................................................................17
Concrete Backup.....................................................................................................................17
Other Factors That May Affect Your System...........................................................................20
Inspect Shipment ........................................................................................................................21
Assembly ....................................................................................................................................21
Self-Contained Backups .............................................................................................................23
Concrete Backups.......................................................................................................................25
Maintenance and Repair.............................................................................................................32
Life Expectancy .......................................................................................................................32
Parts Ordering Procedure .......................................................................................................33
REACT 350®II Final Inspection Checklist ..................................................................................34
Visual Drive-By Inspection ......................................................................................................35
Walk-Up Inspection Checklist..................................................................................................35
Post-Impact Instructions and Drawings...................................................................................36
REACT 350®II TL-3 w/Self-Contained BackupR626B036U................................................37
REACT 350®II TL-3 w/Concrete BackupR626C036U.........................................................38
Transition Assembly, SC BU, UNI117815 ...........................................................................39
Transition Assembly, SC BU, N616120..............................................................................40
Transition Assembly, SC BU, N, w/Rub Rail117827...........................................................41
Base Track Assembly 36” Wide Units605028.....................................................................44
Concrete B-up Base Track Assembly 36” Wide Units605020 ............................................46
Transition Assembly w/Concrete Backup616084 ...............................................................49
Cast-in-Place Concrete Slab w/Steel Backup 36”114054...................................................50
Nose Cover Assembly TL-3617967 .....................................................................................53
Chain/CYL Connector Assembly606182 ............................................................................54
Cable Assemblies605780 ....................................................................................................56
Reflector Assembly, White/Amber, Side613705 ..................................................................58
Misc. Hardware611324.......................................................................................................59
Debris Cover Assembly, 36”606715 ....................................................................................60
Debris Cover Assembly, 36”606716 ....................................................................................61
Debris Cover Assembly618102 ...........................................................................................62
Drivable Pile Anchor (DPA)607938.....................................................................................63
Sign Post Assembly Instructions115254..............................................................................64

TrinityHighway.com 3 Revision E November 2020
Customer Service Contacts
Trinity Highway is committed to the highest level of customer service. Feedback regarding the
REACT 350
®
II, its assembly procedures, supporting documentation, and performance is always
welcome. Please contact Trinity Highway for additional information:
Trinity Highway
Telephone [phone] (USA)
[phone] (International)
Contact Link TrinityHighway.com/Contact
Important Introductory Notes
Proper assembly of REACT 350
®
II is critical to achieve performance that has been evaluated
and accepted by the FHWA per NCHRP Report 350. These instructions should be read in their
entirety and understood before assembling the REACT 350
®
II. These instructions are to be used
only in conjunction with the assembly of the REACT 350
®
II and are for standard assemblies only
as specified by the applicable highway authority. If you need additional information, or have
questions about the REACT 350
®
II, please contact the highway authority that has planned and
specified this assembly and, if needed, contact Trinity Highway’s Customer Service Department.
This product must be assembled in the location specified by the appropriate highway authority. If
there are deviations, alterations, or departures from the assembly protocol specified in this
manual, the device may not perform as tested.
Important: DO NOT use any component part that has not been specifically
specified herein for the REACT 350
®
II during assembly or repair.
This product has been specified for use by the appropriate highway authority and has been
provided to that user who has unique knowledge of how this system is to be assembled. No
person should be permitted to assist in the assembly, maintenance, or repair of this system that
does not possess the unique knowledge described herein. These instructions are intended for
an individual qualified to both read and accurately interpret them as written. These instructions
are intended only for an individual experienced and skilled in the assembly of highway products
that are specified and selected by the highway authority.
A manufacturer’s drawing package will be supplied by Trinity Highway upon request. Each
system will be supplied with a specific drawing package unique to that system. Such drawings
take precedence over information in this manual and shall be studied thoroughly by a qualified
individual who is skilled in interpreting them before the start of any product assembly.

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Safety Symbols
This section describes the safety symbols that appear in this REACT 350®II manual. Read the
manual for complete safety and assembly information.
Symbol Meaning
Safety Alert Symbol: Indicates Danger, Warning, Caution, or Important.
Failure to read and follow the Danger, Warning, Caution, or Important indicators
could result in serious injury or death to the workers and/or bystanders.
Important: Read safety instructions thoroughly and follow the assembly
directions and suggested safe practices before assembling, maintaining, or
repairing the REACT 350®II. It is the responsibility of the installer to follow the
instructions contained in this manual. Failure to comply with these warnings could
result in increased risk of serious injury or death in the event of a vehicle impact
with a system.
Important: Please keep up-to-date instructions for later use and reference by
anyone involved in the assembly of the product.
Safety Rules for Assembly
* Important Safety Instructions *
This manual must be kept in a location where it is readily available to persons who assemble,
maintain, or repair the REACT 350®II. Additional copies of this manual are available from Trinity
Highway by calling [phone] or visiting TrinityHighway.com/Product/REACT-350-II/. Please
contact Trinity Highway if you have any questions concerning the information in this manual or
about the REACT 350®II. This manual may also be downloaded directly from the website below.
It is the responsibility of the installer to use appropriate safety precautions when operating power
equipment, and when moving heavy equipment or REACT 350®II components. Work gloves,
apron, eye / ear protection, safety-toe shoes, and back protection shall be used.
Warning: It is the responsibility of the installer to use all safety measures
incorporating appropriate traffic control devices specified by the highway authority.
These measures must be used to protect all personnel while at the assembly,
maintenance, or repair site.
Warning: It is the responsibility of the installer to ensure that your assembly
meets all appropriate Manual on Uniform Traffic Control Devices (“MUTCD”) and
local standards.
Warning: It is the responsibility of the installer to ensure REACT 350®II
delineation meet all federal, state, specifying agency, and local specifications.

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Limitations and Warnings
Trinity Highway, in compliance with the NCHRP Report 350 “Recommended Procedures for the
Safety Performance of Highway Safety Features”, contracts with FHWA approved testing facilities
to perform crash tests, evaluation of tests, and submittal of results to the FHWA for review.
The REACT 350®II has been approved by FHWA as meeting the requirements and guidelines of
NCHRP Report 350. These tests typically evaluate product performance defined by NCHRP
Report 350 involving a range of vehicles on roadways, from lightweight cars (approx. 820 kg [1800
lb.]) to full size pickup trucks (approx. 2000 kg [4400 lb.]). A product can be certified for multiple
Test Levels. The REACT 350®II is certified to the Test Level(s) as shown below:
Test Level 3: 100 km/h [62 mph]
These FHWA directed tests are not intended to represent the performance of systems
when impacted by every vehicle type or every impact condition existing on the roadway.
This system is tested only to the test matrix criteria of NCHRP Report 350 as approved by
FHWA.
Trinity Highway neither represents nor warrants that the impact results of these federally
established test criteria prevent or reduce the severity of any injury to person(s) or damage to
property. These tests only demonstrate the occurrence of certain results following an impact
within NCHRP Report 350 criteria. Every departure from the roadway is a unique event.
The REACT 350®II is intended to be assembled, delineated, and maintained within specific state
and federal guidelines. It is important for the highway authority specifying the use of a highway
product to select the most appropriate product configuration for its site specifications. The
customer should be careful to properly select, assemble, and maintain the product. Careful
evaluation of the site lay out, vehicle population type; speed, traffic direction, and visibility are
some of the elements that require evaluation in the selection of a highway product. For example,
curbs could cause an untested effect on an impacting vehicle.
After an impact occurs, the debris from the impact should be removed from the area immediately
and the specified highway product should be evaluated and restored to its original specified
condition or replaced as the highway authority determines as soon as possible.
Warning: Do not assemble, maintain, or repair the REACT 350®II until you have
read this manual thoroughly and completely understand it. Ensure that all Danger,
Warning, Caution, and Important statements within the manual are completely
followed. Please call Trinity Highway at [phone] if you do not understand
these instructions.
Warning: Only Trinity Highway parts that are specified herein can be used for
assembly, maintenance, or repair of the REACT 350®II. Do not utilize or
otherwise comingle parts from other Trinity Highway systems. Such
configurations have not been tested, nor have they been accepted for use.
Assembly, maintenance, or repairs using unspecified parts or accessories is
strictly prohibited.

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System Overview
The REACT 350®II is a potentially reusable, re-directive, non-gating crash cushion for roadside
obstacles up to 3’ [914 mm] wide.
Important: Trinity Highway makes no recommendation whether use or
reuse of any part of the system is appropriate or acceptable following an
impact. It is the sole responsibility of the project engineer and/or the local
highway authority and its engineers to make that determination. It is critical
that you inspect this product after assembly is complete to make certain that
the instructions provided in this manual have been strictly followed.
The REACT 350®II utilizes various Cylinder wall thicknesses to accommodate both light cars and
heavier, high-center-of-gravity vehicles.
The REACT 350®II consists of a series of “smart plastic” Cylinders attached to a steel Base Track.
The term “smart plastic” refers to the memory characteristics of the Cylinders. After a head-on
impact as described in NCHRP Report 350, the REACT 350®II has the potential to recover a
major portion of its shape, position, and energy absorbing capability. What constitutes a
potentially reusable highway product should only be determined by a trained engineer,
experienced in highway products, directed by the appropriate highway authority.
Two backup options are available to further meet specific requirements of each location. A Self-
Contained Backup is available or the REACT 350®II can be mounted to a new or existing
Concrete Backup. In some locations, either Backup type may be applicable.
Concrete Backup (Optional)
Left
Right
Self-Contained
Backup Shown
Figure 1 - REACT 350®II with Self-Contained Backup

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Foundation/Anchoring
Warning: Ensure that this assembly conforms with the guidance provided by the
AASHTO Roadside Design Guide, including, but not limited to, those regarding
placement on or adjacent to curbs.
Asphalt Installations
REACT 350®II systems with a Self-Contained Backup may be installed in construction zones on
asphalt. Assemblies on Asphalt Concrete (“A.C.”) must provide a minimum 3” [76 mm] layer of
asphalt over a minimum 3” [76 mm] layer of Portland Cement Concrete (“P.C.C.”), 6” [152 mm]
layer of asphalt over 6” [152 mm] layer of subbase, or 8” [203 mm] layer of asphalt with no
subbase.
Important: Only 18” [460 mm] threaded rods, utilizing Trinity Highway approved
adhesive, can be used with asphalt foundations. Contact Customer Service for a
complete list of approved adhesives (p. 3).
Concrete Installations
For concrete installations, the REACT 350®II should be installed only on an existing or freshly
placed and cured concrete base (28 MPa [4000 psi] minimum). Orientation of the concrete base
and the attenuator must comply with the project plans or as otherwise determined by the resident
project engineer or appropriate highway authority.
Recommended dimension and reinforcement specifications for new concrete pads can be found
in your site specific drawing package or standard drawings in the back.
The REACT 350®II may be installed on any of the following foundations using the specified
anchorage:
Foundation A: Concrete Pad or Roadway
Foundation: 8” [200 mm] minimum depth P.C.C.
Anchorage: Approved adhesive with 7 1/2” [190 mm] studs 6” [152 mm] embedment
Foundation B: Asphalt over P.C.C.
Foundation: 3” [76 mm] minimum A.C. over 3” [76 mm] minimum P.C.C.
Anchorage: Length of anchor required is 18” [460 mm] 16 1/2” [420 mm] embedment
Foundation C: Asphalt over Compacted Subbase (“C.S.”)
Foundation: 6" [150 mm] minimum A.C. over 6" [150 mm] minimum C.S.
Anchorage: Approved adhesive with 18" [460 mm] studs 16 1/2” [420 mm] embedment
Foundation D: Asphalt
Foundation: 8” [200 mm] minimum A.C.
Anchorage: Approved adhesive with 18" [460 mm] studs - 16 1/2” [420 mm] embedment

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Trinity Highway Approved Adhesive Anchoring System
A Trinity Highway approved adhesive anchoring system is required to securely anchor crash
cushions. Each approved adhesive kit contains adhesive, studs, nuts, washers and instructions.
Both vertical and horizontal assemblies are possible using an approved adhesive anchoring
system.
Important: Follow adhesive manufacturer’s temperature storage requirements.
Anchor Assemblies
Note: Read all Trinity Highway approved adhesive instructions before starting.
1) Prepare the Concrete Foundation
Warning: Do not allow anchoring adhesive to contact skin or eyes. See material
safety data sheet supplied with adhesive kit for first-aid procedures. Use only in
well-ventilated area. Do not use near open flame.
Warning: It is the responsibility of the installer to maintain a safe work area
including the use of standard work zone safety equipment & PPE: gloves, safety-
toe shoes, and eye / ear protection.
The anchor bolts (studs) that anchor the REACT 350®II system Backup and/or Monorail
sections to the concrete foundation must be those shipped in the kit or of high strength steel
(Grade B7 or SAE-J429 Grade 5) tensile strength. These studs must be set in minimum 28
MPa [4000 psi] concrete. Allow the concrete to cure a minimum of seven days before applying
anchoring adhesive.
2) Drill Boreholes
Caution: It is the responsibility of the installer to consult OSHA silica
respiratory standard 29 CFR 1910.134 for debris removal from borehole(s)
and use Trinity Highway approved adhesive to achieve optimum tensile
strength. Do not use diamond drill bits for drilling boreholes.
Use the part that is to be anchored as a drilling template. Use a rotary hammer drill to drill the
boreholes 1/8” [3 mm] larger than the stud diameter to the recommended depth. See the
approved adhesive instructions provided with your kit. Check to ensure all boreholes are
drilled to the proper depth and aligned with the part to be anchored per table below.
Anchor Drilling Information
Anchor Size: Bit Size Drilling Depth Torque Medium
3/4”x 7 1/2" 22 mm [7/8”] 160 mm [6 1/4”] Manufacturer Spec Concrete
3/4”x 18" 22 mm [7/8”] 420 mm [16 3/4”] 15 N-m [10 ft-lb] Asphalt
Important: When mounting on asphalt, initial torque shall be as shown
above. Due to the properties of asphalt, anchors may loosen over time. For
this reason Trinity Highway recommends anchoring to asphalt only at
temporary locations. It is recommended to re-torque anchors in asphalt
every six months to the recommended torque specification.

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3) Clean the Boreholes
Blow the concrete dust from the borehole using oil-free compressed air. Thoroughly brush it
with a 7/8” diameter steel bristle tube brush and then blow it out again. If the borehole is wet,
completely flush it with water while brushing and then blow it clean to remove all water using
oil-free compressed air.
Note: Use of the Trinity Highway approved vacuum drilling equipment is authorized to replace
the blowing and brushing requirement of Step 3.
4) Apply Approved Adhesive
Fill the borehole 100% full.
Caution: Fill borehole 100% full so it is even with the pavement surface per
manufacturer’s instructions.
5) Add Nuts to Anchors
Thread the nut on until flush with the end of the stud (Figure 2).
6) Insert Anchors in Boreholes and Wait for Adhesive to Cure
Push the stud down through the part to be anchored and into the borehole.
Warning: Do not disturb or load the stud until the approved
adhesive material has fully cured (instructions supplied with
the approved adhesive kit).
7) Torque the Nuts
Once the adhesive has fully cured, torque the nut to the
manufacturer’s recommended values.
Anchor Assembly Cautions
1) Steel rebar
If steel rebar is encountered while drilling an anchor bolt borehole, apply one of the following
solutions:
A) Use a rebar drill bit for the rebar only and then switch back to the concrete bit to finish
drilling into the underlying concrete until the proper borehole depth is reached.
Caution: Do not drill through rebar without first obtaining permission to do so
from the project engineer.
B) Drill a new borehole down at an angle past the rebar to the proper depth. Anchor the stud
by completely filling both boreholes with an approved adhesive.
Figure 2
Anchor Application
(Before Applied Torque)

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Recommended Tools
Documentation
Manufacturer’s Instructional Manual
Manufacturer’s Drawing Package
Personal protective equipment
Eye / Ear Protection
Gloves
Protective Clothing
Reflective Vest
Safety-Toe Shoes
Cutting equipment
Grinder/Hacksaw or Torch
Rebar Cutting Bit
Rotary Hammer Drill
22 mm (7/8”) x 178 mm (7”) Hollow Drill Bit for vacuum feature
19 mm (3/4”) x 178 mm (7”) Concrete Drill Bit (double-fluted)
Important: Trinity Highway recommends using double-fluted drill bits to achieve
optimum tensile strength when applying an approved adhesive anchoring system
(p. 8).
Important: Because every impact is different, Trinity Highway makes no
recommendation whether use or reuse of any part of the system is
appropriate or acceptable following an impact. It is the sole responsibility
of the project engineer and/or the local highway authority and its engineers
to make that determination. It is critical that you inspect this product after
assembly is complete to make certain that the instructions provided in this
manual have been strictly followed.
Hammers
Sledgehammer
Wrenches
Heavy duty impact wrench
1/4”, 5/16”, 3/8”, 3/4”, 1 7/8" Sockets
3/4”, 1 1/16”, 1 1/8”, 1 1/4” Deep Hex-head Sockets
Ratchet and extensions for above sockets
Standard adjustable wrench
1 1/16”, 1 1/8”, 1 1/4”, 9/16”, 5/8” combination wrenches
Large Pipe Wrench

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Screwdrivers
Screw gun or standard drill with adapter chuck for small screws/bolts
Flathead Screwdriver
Phillips Screwdriver
Miscellaneous
Traffic control equipment
Lifting and moving equipment (A lifting device is preferred although a forklift can be
used.) Minimum 2722 kg [6,000 lb.] capacity required. Do not lift overhead.
Compressor (100 psi) and Generator (5 KW)
Long pry bar
Drift pin
Tape measure 7.5 m (25’)
Chalk line
Rags, water, and solvent for touch-up
Important: The above list of tools is a general recommendation and should
not be considered an extensive list. Depending on specific site conditions
and the complexity of the assembly specified by the appropriate highway
authority, the required tools may vary. Decisions as to what tools are needed
to perform the job are entirely within the discretion of the specifying highway
authority and the authority’s selected contractor performing the assembly of
the system at the authority’s specified assembly site.

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Know Your REACT 350®II System
For specific assembly, maintenance, or repair details refer to the state or specifying agency’s
standard drawing(s) and/or Trinity Highway standard layout drawings.
Figure 3
System Size
Backup
Self-Contained Concrete
Effective Length 5.52 m [18'-1 1/2"] 5.52 m [18'-1 1/2"]
System Length 6.47 m [21'-2 3/4"] 6.02 m [19'-9"]
Effective Width .91 m [3'-0"]
System Width 1.19 m [3'-10 3/4"]
Height 1.31 m [4'-3 1/2"]
)

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Model Number Description
PN Backup Type Width
626B36 Self-Contained steel backup BTypical object width*8” [203 mm]
626C36 Concrete Backup w/ Side Mount Anchors CMax. object width 36” [914 mm]
Number of Bays
A Bay consists of one Cylinder. The terms Bay and Cylinder may be used interchangeably. The
Cylinder at the front of the system (traffic end) is always Bay 1, and each subsequent Bay is
sequentially numbered to the rear of the system (roadside obstacle end).
Figure 4
Number of Bays
1
2
3
5
6
Self-Contained
Backup Shown
Concrete
Backup
*See “Roadside Obstacle Width” on page 18 for more information.
4
Left
Right

TrinityHighway.com 14 Revision E November 2020
Backup Type
It is important to fully understand the limitations of each backup type so the correct REACT 350
®
II
is chosen for each location.
The REACT 350
®
II is available with a Self-Contained Backup or may be attached to a Concrete
Backup. Refer to Figures 5a and 5b, along with the backup assembly drawings, to determine
which type of backup is appropriate.
Self-Contained Backup
A REACT 350
®
II with a Self-Contained “steel tube” Backup will require two cables, one cable on
each side of the Cylinders. These cables begin at the front of the system, travel through the Cable
Guides on the Cylinders, loop around the backup structure, travel back through the Cable Guides,
and terminate at the front of the system.
Concrete Backup
REACT 350
®
II with a Concrete Backup requires four cables. Two cables on each side of the
Cylinders begin at the Side Anchor Plates, travel through the Cable Guides on the Cylinders, loop
around the pin on the Front Anchor Plates, travel back through the Cable Guides, and terminate
at the Side Anchor Plates.
Existing concrete structures may serve as backups for REACT 350
®
II provided they meet specific
size and strength requirements.
Figure 5a Figure 5b
Self-Contained Backup Concrete Backup
Concrete
Backup Two Cables, Four Runs
Self-Contained
Backu
p
One Cable, Two Runs

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System Design
Self-Contained Backup
The REACT 350®II with a Self-Contained Backup is intended to minimize assembly time. This
type of system arrives at the site fully assembled. The assembly crew needs only to lift and place
the system in front of the barrier then drill and set the anchors. Refer to the Assembly section on
page 21 for a complete list of instructions.
Roadside Feature Width
Generally the REACT 350®II, with a Self-Contained Backup, can shield objects up to 8” [203 mm]
wide in a gore application. This type of system can also shield wider roadside features in non-
gore and bidirectional traffic locations (p. 17). Please contact Trinity Highway for any additional
information (p. 3).
When shielding median barriers (32” [813 mm] high safety shape or single slope), a Self-
Contained Backup may be used if the base or “toe” of the barrier is tapered @ 1:4 (15 deg.
Maximum) starting at the projected face of the Self-Contained Backup (Figure 6). Transition
panels must be added to any side exposed to traffic (p. 22, Figure 16). This helps prevent
interaction of wheels on impacting vehicles.
Figure 6
Tapered Barrier
1:4 Taper @ Base
of Concrete Barrier
1:4 Taper @ Base
of Concrete Barrier
Projected face of
Self-Contained
Backup

TrinityHighway.com 16 Revision E November 2020
Guardrail Attachment
Hardware is available to mount W-beam guardrail or a safety shaped barrier to the Self-Contained
Backup of the REACT 350®II system. A folded Transition Plate and W-beam connector can mount
to either or both sides of the backup assembly (Figure 7). If bidirectional traffic is present, special
post spacing, rail, and rub-rail will be required for the guardrail. Thrie Beam guardrail adapters
are also available. Contact Trinity Highway for assistance (p. 3).
Figure 7
Guardrail Attachment Hardware
Bidirectional Traffic
If bidirectional traffic (vehicles traveling opposite directions on either side of the system) is
present, special consideration needs to be taken when placing the system. It is important that the
Self-Contained Backup does not become a roadside obstacle to the reverse direction traffic. If a
system is placed in a location where traffic will be approaching from the rear of the system,
transition hardware may be required.
Optionally, if space permits, the REACT 350®II may be offset so that the backup structure is
shielded by the roadside feature (p. 17). Guardrail transition hardware may also be used.
Figure 8
Bidirectional Traffic
Transition Plate
PN 616148
W-Beam End Shoe
PN 000926
3/4" Hex Nut
PN 115953
3/4" Bolt
PN 113548

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Offsetting the System
The REACT 350®II, with a Self-Contained Backup, may be offset from the center of the roadside
obstacle if space permits. Offsetting may be necessary for two reasons:
1) To shield a fixed object wider than 200 mm [8”]
2) If bidirectional traffic is present
When offsetting the system, align the vertical face of the Backup structure with the face of the
barrier (Figure 9). With this method, REACT 350®II with Self-Contained Backup may shield
roadside features up to 610 mm [24”].
Important: A Concrete Backup may be required if a wider roadside feature or
bidirectional traffic are present. Please contact Trinity Highway Customer Service
for additional information (p. 3).
Figure 9
Offsetting the System
Concrete Backup
The REACT 350®II system is also intended to mount directly to a new or existing Concrete
Backup. This type of system requires slightly more assembly time, as the cables must be
assembled on site (p. 27).
Existing Concrete Backups must be a minimum of 40” [1000 mm] high, 24” [610 mm] long, and
30” [762 mm] to 36” [914 mm] wide, with 28-day strength of 4000 psi [28 MPa] and fully reinforced.
If your existing structure does not meet these minimums, special hardware and designs may be
available for them. Contact Trinity Highway Customer Service Department if you have questions
concerning Concrete Backup requirements (p. 3).

TrinityHighway.com 18 Revision E November 2020
Roadside Obstacle Width
The REACT 350®II system with a Concrete Backup may be specified to protect obstacles up to
36” [914 mm] wide. The backup must be 30” [762 mm] to 36” [914 mm] wide to use standard side
anchor hardware.
Bidirectional Traffic
If bidirectional traffic (vehicles traveling opposite directions on either side of the system) is
present, special consideration needs to be taken when placing the system.
It is important for the highway design engineer and the assembler to ensure that the Concrete
Backup itself does not become a roadside obstacle to the reverse direction traffic. If the system
is placed in a location where traffic will be approaching from the rear of the system, the Backup
should not protrude beyond the obstacle being shielded. Concrete tapering may be required.
Also, an additional standard Side Anchor Plate should be rotated 180 degrees and placed behind
the first anchor plate (Figure 10). In this case, the backup must be at least 30” [762 mm] long.
Figure 10
Standard Anchor Plate with Concrete Backup
Figure 11a Below-Grade Anchor Block Figure 11b - Anchor Block Not Needed
Additional Side
Anchor Plate

TrinityHighway.com 19 Revision E November 2020
Application Assistance
Contact Trinity Highway Customer Service if you would like input as to your specific application.
Proper model selection is essential to the performance of the REACT 350®II. You will need to
answer the following questions:
1. Are curbs, islands, or elevated objects (delineators or signs) present at the site? What
height and width are they? All curbs and elevated objects should be removed. Curbs
should be removed from behind the backup to approximately 50’ [15 m] in front of the
REACT 350®II. Any curbs that must remain should be 4” [102 mm] maximum and be
mountable. Signs should not interfere with the system’s ability to collapse. Generally, a
vehicle should not interact with two objects at the same time. Allow adequate spacing.
2. If the deployment site is a gore area (place where two roads diverge), what is the angle of
divergence?
3. What is the general geometry of the site? Include the roadway for 500’ [150 m] in front of
the roadside feature, so traffic patterns can be visualized.
4. Is there an existing guardrail or median barrier at the site?
5. What is the width of the roadside obstacle to be protected?
6. Will there be traffic approaching from the rear of the system? Is the system in a two-way
traffic situation with traffic going in opposite directions on either side of the system, or is
the system on the side of the road where cross over traffic is a concern? If yes, then a
transition from the fixed object to the rear of the system may be necessary to prevent a
vehicle from interacting with the rear of the system (pp. 16 and 18).
7. Are there any other unique features at the site that may affect the positioning or
performance of the REACT 350®II? See the next page for Other Factors That May Affect
Your System.
Warning: Do NOT modify the REACT 350®II in any way.
Warning: Safety measures incorporating appropriate traffic control devices
specified by the highway authority must be used to protect all personnel while at
the assembly, maintenance, or repair site.
Warning: Ensure that there is proper site grading for the REACT 350®II
placement as dictated by the state or specifying agency, pursuant to FHWA
acceptance.