Item Brochure

12
PRODUCT SPECIFICATIONS
L B 1 2 - 2
LB 12-2
12" Linear Barrier
Specified tree root guides are mechanical barriers and root
deflectors to prevent tree roots from damaging hardscapes
and landscapes. LB 12-2 panels are preassembled with flex-
ible joiner strips in 80' (24m) lengths for linear applications
directly beside a hardscape adjacent to the trees. Each
preassembled section can be separated or reconfigured in
any 2' (61cm) module.
A. MATERIALS
1. The contractor shall furnish and install tree root guides as specified.
The tree root guides shall be product # LB 12-2 as specified on these draw-
ings 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 0.080" (2.03mm) wall thickness
in modules 24" (61cm) long by 12" (30.48cm) 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 a minimum of
.06" (1.52mm) thickness protruding ½" (12.7mm) at 90 degrees from the
interior of the panel, spaced 6" (15cm) 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 ¼" (6.35mm) apart with the lower rib attached to the vertical root
deflecting ribs. (See Detail A)
Not less than 3 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 ¼" (57mm) chord of the segment joining the panel wall and
the segment, protruding 3/8" (9.53mm) from the panel. The minimum of 3
ground locks on each panel shall be about equally spaced between each of
the vertical root deflecting ribs (1 between each set of ribs, see Detail B).
A preassembled self locking flexible (0-180 degrees) joiner strip to connect
one panel to the next (see Detail C).
2. The basic properties of the material shall be:
Test ASTM Test
Method
Typical Value Copolymer
Polypropylene
Tensile stress @ yield D638 3,800 PSI
Elongation @ yield D638 6.3%
Flexural Modulus D790B 155,000 PSI
Notched Izod Impact D256A 7.1
Rockwell Hardness r. scale D785A 68
U.S. Patents: 5,070,642 and 5,305,549.
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 in the length 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 top edge shall be ½"
(13mm) above grade. Each of the required number of panels shall be connect-
ed with the flexible joiner strips to the required length for the linear application.
2. Excavation and soil preparation shall conform to the drawings.
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