Item Brochure

13
PRODUCT SPECIFICATIONS
U B 1 8 - 2
UB 18-2
18" Universal Barrier
Specified tree root barriers are mechanical barriers and root
deflectors to prevent tree roots from damaging hardscapes
and landscapes. Assembled in 2' (61cm) long modules for
linear applications directly beside a hardscape adjacent to
one side of the trees or to create varying sizes of cylinders
for surrounding root balls (surround planting style).
A. M A T E R I A L S
1. The contractor shall furnish and install tree root guides as specified.
The tree root guides shall be product # UB 18-2 as manufactured by Deep
Root Partners, L.P. 530 Washington Street, San Francisco, CA 94111
(800/458.7668), or approved equal. The barrier shall be black, injection
molded panels, of .080"(2.03mm) wall thickness in modules 24" (61cm)
long by 18"(46cm) deep; manufactured with a minimum 50% post consumer
recycled polypropylene plastic with added ultraviolet inhibitors; recyclable.
Each panel shall have:
Not less than 4 molded integral vertical root deflecting ribs of at least
0.06"(1.52mm) thickness protruding 1/2"(12.7mm) at 90° from interior of the
barrier panel, spaced 6"(15.24mm) apart (see panel drawing below).
A double top edge consisting of two parallel, integral, horizontal ribs at the top
of the panel of a minimum 0.06"(1.52mm) thickness 3/8"(9.53mm) wide and
1/4"(6.35mm) apart with the lower rib attached to the vertical root deflecting
ribs (see Detail A).
A minimum of 9 anti-lift ground lock tabs consisting of integral horizontal
ridges of a minimum 0.06"(1.52mm) thickness in the shape of a segment of
a circle, the 2 1/4"(57mm) chord of the segment joining the panel wall and
the segment, protruding 3/8"(9.53mm) from the panel. The nine ground locks
on each panel shall be about equally spaced between each of the vertical root
deflecting ribs (3 between each set of ribs, see Detail B).
An integrated zipper joining system providing for instant assembly by sliding
one panel onto another (see Detail C).
2. The basic properties of the material shall be:
Test ASTM Test
Method
Value Copolymer
Polypropylene
Tensile strength @ yield Wall D638 2,383 PSI
Tensile strength @ yield Hinge D638 2,483 PSI
Yield Elongation – Wall D638 7.71%
Yield Elongation – Hinge D638 7.58%
Flexural Modulus D790B 120,785 PSI
Notched Izod Impact–Wall D256A 2.54 (ft-lbs.)
Rockwell Hardness r. scale – Wall D785A 84.1
B. C O N S T R U C T I O N A N D I N S T A L L A T I O N
1. The contractor shall install the tree root barriers with the number of panels
and in the manner shown on the drawings
. The vertical root deflecting ribs
shall be facing inwards to the root ball and the top of the double edge shall
be 1/2" (12.7mm) above grade. Each of the required number of panels shall
be connected to form a circle around the root ball or joined in a linear fashion
and placed along the adjacent hardscape.
2. Excavation and soil preparation shall conform to the drawings.
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