Trinity Highway QuadGuard II, Product Description Manual

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TrinityHighway.com 6 Revision H November 2019
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.
Site Conditions
Cross-slope exists – If there is a cross-slope of
more than 8% (5 degrees), or if the cross-slope
varies (twists) more than 2% (1 degree) over the
length of the system, a concrete leveling pad
may be required (Figure 4).
No cross-slope – No additional action is
required.
1) Specify Backup Structure
The two Backup designs available are the Tension Strut Backup and the Concrete Backup.
Both types are appropriate for use on grade or deck.
2) Special Conditions
Contact Trinity Highway Customer Service Department if you would like input with your
application. 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 over 4” [100 mm] high
should be removed. If possible, curbs taller than 4” [100 mm] high should be removed
approximately 50’ [15 m] in front of the QuadGuard
®
II and as far back as the system’s
Backup. Any curbs that must remain should be 4” [100 mm] maximum and be mountable.
2. What is the angle of divergence if the construction site is a gore area?
What is the general geometry of the site , including the roadway for at least 500’ [150 m] in
front, so traffic patterns can be visualized?
3. Is there an existing barrier? Where there is an existing guardrail or median barrier at the
site, the Backup of the QuadGuard
®
II should tie into it when possible.
4. 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 in a location where crossover traffic is a concern?
If so, a Transition from the back of the system to the hazard is necessary to prevent vehicle
interaction (pp. 12 & 13).
5. Are there any other unique features at the site that may affect positioning or
performance of the QuadGuard
®
II?
Figure 4
Cross-Slope