Item Brochure

14
PRODUCT SPECIFICATIONS
UB 24-2
UB 24-2
24" Universal Barrier
Specified tree root guides are mechanical barriers and root
deflectors to prevent tree roots from damaging hardscapes
and landscapes. UB 24-2 is assembled in 2' (61cm) long
modules to create varying sizes of cylinders for surrounding
root balls (surround planting style) or for linear applications
directly beside a hardscape adjacent to one side of the trees
(linear 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 UB 24-2 as manufactured by Deep Root
Partners, L.P., 530 Washington Street, San Francisco, CA 94111
(800/458.7668), or approved equal. The guide shall be black, injection
molded panels, of 0.085" (2.16mm) wall thickness in modules 24" (61cm)
long by 24" (61cm) 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 directing ribs of a minimum
0.085" (2.16mm) thickness protruding 1/2" (12.7mm) at 90° from interior of
the guide panel, spaced 6"(152.4mm) apart (see panel drawing).
A double top edge consisting of two parallel, integral, horizontal ribs at the
top of the panel of a minimum 0.085" (2.16mm) 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 0.085" (2.16mm) thickness in the shape of a segment
of a circle, the 2" (50.8mm) 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 directing 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 2,354 PSI
Tensile strength @ yield Hinge D638 2,846 PSI
Yield Elongation – Wall D638 7.44%
Yield Elongation – Hinge D638 7.01%
Flexural Modulus D790B 119,625 PSI
Notched Izod Impact–Wall D256A 3.84 (ft-lbs.)
Rockwell Hardness r. scale – Wall D785A 84.4
U.S. Patents: 5,070,642, 5,305,549 and 5,528,857. Other Patents Pending
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 guides with the number of panels
and in the manner shown on the drawings. The vertical root directing ribs
shall be facing inwards to the root ball and the double top edge shall be 1/2"
(12.7mm) above grade. Each of the required number of panels shall be con-
nected to form a circle around the root ball or joined in a linear fashion and
placed along the adjacent hardscape.
2. Excavation and preparation shall conform to the drawings.
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