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PLASTIC TREE GRATES

plastic tree grates tree grates lightweight tree grates Earth Friendly
Easy To Maintain
Easily Expanded
A.D.A. Compliant
Durable and Long-lasting
Saves on Time and Freight
Lightweight - Easy to Install
Never Rusts - Never Needs
Painting

TRB33 - 3-Foot Round All Detailed Drawings are Half Grates
round tree grates
Weight - 17 lbs. (7.7 kg)
TRB44 - 4-Foot Round
4 foot tree grates
Weight - 26 lbs. (11.7 kg)
TRB55 - 5-Foot Round
5 foot tree grates
Weight - 45 lbs. (20.4 kg)
Use Extensions for Larger Tree Pits More Round Sizes
models. Just bolt them on to double the length! Each extension kit
comes complete with (2) extension grates and (2) tamper-resistant
assembly kits. Poly-Grate II extension provide the ability to
increase the size of our 4’ and 5’
Additional round sizes are available by the
following part numbers:
2.5-Foot Round (76.2 cm) TRB28
3.5-Foot Round (106.7 cm) TRB42
4.5-Foot Round (137.2 cm) TRB54
extension tree grates Call us for information
on these sizes.

TSB44 - 4-Foot Square
All Detailed Drawings are Half Grates
square tree grates
Weight - 36 lbs. (16.3 kg)
TSB55 - 5-Foot Square
5 foot square tree grate
Weight - 58 lbs. (26.3 kg)
TSB44C - 4-Foot Square/Round Combo
square and round tree grate
Weight - 31 lbs. (14.0 kg)
TSB55C - 5-Foot Square/Round Combo
combination tree grate
Weight - 58 lbs. (23.06 kg)

POLYGRATE™ FRAME
4' PolyGrate™ Frame
5' PolyGrate™ Frame
The 4’ PolyGrate™ Frame is for use with the
TSB44 square tree grate. The PolyGrate™
Frame system is kitted as four separate frame
components and includes Tap-Con screws.
PolyGrate™ Frame is easy to install and can
be used with either new or retrofit installations.
The 5’ PolyGrate™ Frame is for use with the TSB55
square tree grate. The PolyGrate™ Frame is for new
or retrofit applications. The PolyGrate™ Frame system
is kitted as four separate frame components and includes
Tap-Con screws. PolyGrate™ Frame is easy to install
and can be used with either new or retrofit installations.

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PRICING
Size
Model #
Description
Weight
(lbs.)
Price
4 Ft. Square
Square Black Tree Grate
38
$314.05
5 Ft. Square
Square Black Tree Grate
58
$412.76
4 Ft. x 2 Ft.
Black Tree Grate Extension
-
$314.05
5 Ft. x 2.5 Ft.
Black Tree Grate Extension
-
$412.76
3 Ft. Round
Round Black Tree Grate
19
$331.19
4 Ft. Round
Round Black Tree Grate
28
$331.19
5 Ft. Round
Round Black Tree Grate
45
$430.71
4 Ft. Combo
Square/Round Combo Tree Grate
33
$322.62
5 Ft. Combo
Square/Round Combo Tree Grate
52
$421.75
4 Ft. Sq. Frame
Square Black Tree Grate Frame
17
$78.18
5 Ft. Sq. Frame
Square Black Tree Grate Frame
17
$96.92

Specifications
Part 1 - General Part 3 - Execution
1.1 Work Included 3.1 Inspection
The scope of the work includes labor, materials,
equipment and performance of all work required for
installation of Poly-Grate II as suggested by
manufacturer’s drawings and installation procedures.
Proper site preparation and ongoing maintenance will
determine performance.
3.2 Surface Conditions
Examine concrete ledge, and/or existing tree pit to
receive grate. Correct condition to comply with
manufacturer’s recommended installation procedure.
1.2 Work by Others
Openings to receive grates are to be provided by
others in accordance with instructions of tree grate
manufacturer and are indicated on drawings and
provisions of the specification.
3.3 Installation
A. Opening to Receive Grate
1. Concrete Ledge Supported - New Installation
(figure 3.3A1) Concrete ledge shall be cast in size
and configuration of specified tree grate model plus
3/8” expansion allotment. Ledge shall be 2 inches
below concrete or tiled surface and extend inward
2 to 3 inches. Ledge must be level and free of bulges
and slag.
Part 2 - Product
2.1 Tree Grates
A. Manufacturer
Grates shall be Poly-Grate II, plastic tree grates
as manufactured by us.
2. Angle Iron Frame Supported - Retro-fit
Installation (figure 3.3A2) When pouring sidewalk,
prepare smooth edges to accept lengths of 2” 90º
angle iron cut to specifications of grate size minus
5 inches (for 48” grate cut angle iron to 43”; for
60” grate cut angle iron to 55”). Sidewalk
preparation should allow 3/8” additional length
per side to provide for grate expansion. Attach angle
iron to sides of poured surface with Tap-Con
screws or other approved concrete fastener.
The angle iron support ledge should be placed 2”
below the surface of the concrete.
B. Material
Grates shall be of high-density polyethylene resins
conforming to ASTM D-638.
C. Design
Grate pattern shall comply with A.D.A. requirements
for equal access. Color, size, and configuration shall
be specified by owner/architect.
D. Finish
B. Support and Litter Prevention
Grates shall be manufactured true to pattern, of
uniform quality and size, and free from defects.
Surface shall be smooth; free of sharp edges.
Fill space from bottom of tree pit flush to bottom
of tree grate with pea rock, crushed shale or similar
aggregate.
2.2 Hardware
C. Join Grate Halves
Fasteners (included)
Bring tree grate halves together around a tree at a
height that allows easy access to underside. Join
section at pre-formed holes using tamper-resistant
bolt package provided by manufacturer, or approved
equal. Lower grate into place.
Grate halves shall be joined together with tamper-
resistant bolt package as provided by us. Package
to consist of (6) each #16 3/8” x 1-1/4” button head
socket-cap screw, stainless; #16 3/8” Tuff Nut,
brass; and (12) each 3/8” USS Flat washer, zinc.
TEST DATA
The key to any successful landscape project is to
budget for ongoing maintenance expenditures, such as
grate expansion as your trees mature. For best results
and longevity, PolyGrate™ requires that the space
between the ground and tree grate bottom be filled with
course aggregate for all installation applications. This
will properly support the grate, prevent accumulation
of debris under grate and protect close-to-surface root
systems.
  ASTM Test Units  Typical Values
Resin Properties:      
Density D-1505 g/cc 0.957
Melt Index D-1238 g/10 min 7
Molded Properties:  
Tensile Modulus  
(1% Secant) D-638 psi 166000
Tensile at Yield D-638 psi 4300
Elongation at Break D-638 % 1400
Flexural Modulus D-790 psi 194000
Bike Racks, Tree Grates, Tree Guards, Bicycle Racks, Concrete Bike Racks, Park Furnishings, Plastic Tree Grates,
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