Trinity Highway QuadGuard II, Product Description Manual

Page: 14 / 56

TrinityHighway.com 13 Revision H November 2019
Foundation/Anchoring
Warning:
It is the responsibility of the installer 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
Systems with a Tension-Strut Backup may be temporarily installed in construction zones on
asphalt. Assemblies on
Asphalt Concrete (“A.C.”) must provide a minimum of 76 mm [3”] layer
of asphalt over a minimum of 76 mm [3”] layer of Portland Cement Concrete (“P.C.C.”) , 152
mm [6”] layer of asphalt over 152 mm [6”] layer of subbase, or 203 mm [8”] layer of asphalt with
no subbase.
Important:
Only 460 mm [18”] threaded rods, utilizing Trinity Highway approved
adhesive, can be used with asphalt foundations. Contact Trinity Highway for a
complete list of approved adhesives (p. 3).
Concrete Installations
For concrete installations, the QuadGuard
®
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
on the standard drawings.
The QuadGuard
®
II may be installed on any of the following foundations using the specified
anchorage:
Foundation A: Reinforced Concrete Pad or Roadway
Foundation: 150 mm [6”] minimum depth P.C.C.
Anchorage: Approved adhesive with 180 mm [7”] studs 140 mm [5 1/2”] embedment
Foundation B: Asphalt over P.C.C.
Foundation: 76 mm [3”] minimum asphalt concrete (A.C.) over 76 mm [3”] minimum P.C.C.
Anchorage: Length of anchor required is 460 mm [18”] 420 mm [16 1/2”] embedment
Foundation C: Asphalt over Subbase
Foundation: 150 mm [6"] minimum A.C. over 150 mm [6”] minimum Compacted Subbase (C.S.)
Anchorage: Approved adhesive with 460 mm [18"] studs 420 mm [16 1/2”] embedment
Foundation D: Asphalt Only
Foundation: 200 mm [8”] minimum A.C.
Anchorage: Approved adhesive with 460 mm [18”] studs - 420 mm [16 1/2”] embedment