TRUEGRID was developed in the U.S.A, and TRUEGRID is manufactured and will
always be manufactured in the U.S.A.
It is produced from 100% post-consumer recycled material.
We take plastic products with a short life cycle that end up in our land-fills, and
we turn them into TRUEGRID…a product with a very long life cycle…which can
then be recycled again.

TRUEGRID® PRO

Manufacturer’s Product Specification Sheet

Dimensions: 16” x 16” x 1.8” (1.78 sq/ft)
Pre-Assembled: 16 sq/ft per layer (4’ x 4’ sheet) (9 grids per layer)
Cell Width: 3-3/16”
Weight: 2.15 lbs
Porosity: 90%
Compressive strength: 6,880 psi pre fill. Psi increases significantly with aggregate fill.
Material: Recycled High Density Polyethylene (100% post-consumer)
Color: Black with UV Stabilizer
Temperature Range: Dimensionally Stable for -58F to 194F
Moisture Absorption: .01%
Environmental Compatibility: Nontoxic, harmless to plants, animals, and microorganisms. Inert
material, groundwater neutral
Installation Speed: 1000 sq/ft per man hour
Other features of TRUEGRID
 Highly resistant to oils, gasoline, acids, salt, ammonia, and alcohol
 May be saw cut
 Patented design yields ultimate hoop strength
 Circular elements provide multi-directional crush and shear strength
 Flexible links allow expansion and contraction depending on environmental conditions
 Built in X-Anchors allows weight of filler to hold grid down without any extra staking
 Interlocking connectors

Ground Preparation:

Depends upon site condition and local conditions.
Suggested Sub-base: 1/2” – 1-1/2” diameter clean/washed, angular gravel.
Depth of this layer should be a minimum of 2”- 6”.
For additional drainage, increase depth of sub-base.
Class 2 road base (crushed concrete) is also a typical sub-base material.
Gravel/sandy soil mix (60/40) is common for grass fill applications.
Level sub-base before laying TrueGrid.
Installation: Layout and snap together pre-assembled sheets. (9 pcs per layer = 16 sq/ft)
If body weight does not level the grids, use plate vibrator or heavy cylinder to level.
Backfill: Any angular or round medium may be used. Fill cells with filler of choice.
3/4” diameter or smaller is recommended for gravel fill.
 TRUEGRID may be cut on site
 Pre-cutting is not required
Angle grinder, circular saw, compass saw, or
handsaw are all options for cutting TRUEGRID.
Delivery:
 Pallet content: 800 sq/ft = 50 layers per pallet = 450 pcs
 Pallet dimensions: 48” x 48” x 95”
 Approximate pallet weight: 1,018 lbs
 Truckload: 24 pallets or 19,200 sq/ft

TRUEGRID® PRO Plus

Manufacturer’s Product Specification Sheet

Dimensions: 24” x 24” x 1.8” (4 sq/ft)
Pre-Assembled: 16 sq/ft per layer (4’ x 4’ sheet) (4 grids per layer)
Cell Width: 3-3/16”
Weight: 5.22 lbs
Porosity: 90%
Compressive strength: 6,880 psi pre fill. Psi increases significantly with aggregate fill.
Material: Recycled High Density Polyethylene (100% post-consumer)
Color: Black with UV Stabilizer
Temperature Range: Dimensionally Stable for -58F to 194F
Moisture Absorption: .01%
Environmental Compatibility: Nontoxic, harmless to plants, animals, and microorganisms. Inert
material, groundwater neutral
Installation Speed: 1000 sq/ft per man hour

Introduction to the TRUEGRID System

In urban watersheds, almost all of the impervious surface area is represented by building rooftops and
paved surfaces. In residential areas most of the paved area is represented by the roadway system and
residential driveways. Parking lots and paved industrial storage areas represent an even larger portion of
the impervious surface in commercial and industrial areas. Impervious pavements can produce twothirds
of the excess runoff in an urban catchment. Runoff from impervious pavements contributes a
substantial loading of hydrocarbons and heavy metal pollutants, and contributes greatly to the
increased temperature of surface runoff. In most urban jurisdictions, a paved roadway system with a
traditional curb and gutter configuration provides a key component of the overall urban drainage
system. Surface flow from adjoining tributary watersheds is conveyed directly into catch basin inlets and
connected piping systems. In these traditional impervious paved systems, the runoff coefficient (runoff
volume) is increased and
the time of concentration is decreased resulting in increased peak rates of runoff.
TRUEGRID provides a highly permeable stabilized surfaces that can be used for the movement and
parking of vehicles (automobiles, trucks, construction equipment, aircraft, etc.) and storage of
materials and equipment. Compared to conventional pavement, the TRUEGRID system is designed to
infiltrate storm water runoff instead of shedding it off the surface. TRUEGRID will reduce the amount of
runoff by allowing water to pass through surfaces that would otherwise be impervious. The storm water
passes through the load bearing surface and aggregate sub base that are selected based upon the
intended application and required infiltration rate. Runoff is stored in the stone aggregate sub base
course / storage layer, and allowed to infiltrate into the surrounding soil (functioning like an infiltration
basin).
A TRUEGRID surface has very high initial surface infiltration rates and can immediately infiltrate and
store rainfall and runoff from high intensity rainstorms. In many cases, direct runoff is completely
eliminated. The surface infiltration rates for these pavements will in most cases exceed 200-250
inches/hour. This is several orders of magnitude higher than all the rainfall intensities encountered in
the Southwest and Midwest USA. These high infiltration rates are also 2-3 orders of magnitude higher
than most soil infiltration rates. The TRUEGRID system relies on the ability of the void space within the
surface material and the sub base to receive, store, and infiltrate water into the underlying sub soils. The
aggregate sub base provides a temporary “reservoir”, receiving the inflow from the surface pavement
layer and providing temporary storage while the water is discharged to the sub grade through
infiltration or released to surface discharge through a sub drain system.
TRUEGRID Permeable Pavers are designed to provide design professionals with an eco-friendly
alternative to concrete and asphalt and other impervious surfaces.
Similar systems have been used in Europe for over 40 years and have been highly effective and accepted
as a better alternative to impervious surfaces. TRUEGRID improved upon this concept and developed a
stronger, more durable, USA made version that can handle any load and rigors concrete can
handle….while being 100% permeable.
TRUEGRID has been honored as one of two winners, from hundreds of green technology products
considered, to receive grants support for education from entities including the U.S. Department of the
Interior and the U.S. Department of Energy. These grants were awarded to TRUEGRID to promote and
educate others on the benefits of TRUEGRID as an eco-friendly alternative to concrete and asphalt.
TRUEGRID was chosen due to its low impact development properties, its stormwater maintenance /high
permeability qualities, high load capacities, long life expectancy-no maintenance performance and 100%
post-consumer recycled material composition.
The value of the TRUEGRID systems includes:
Runoff volume reduction/elimination is achieved when TRUEGRID is placed over in situ soils
and a defined volume of the water passing through the pavement is infiltrated into the soil
subgrade below.
Peak runoff rate reduction is achieved when the volume of water passing through the TRUEGRID
surface is “detained” for a defined period of time within the pavement cross-section and the open
graded aggregate sub base beneath the pavement. The effective infiltration rate for the watershed
is increased by trapping the water in the permeable surfaces and effectively increasing the time of
concentration in the catchment area.
Pollutant removal.Specific field data on the reductions of pollutant concentrations by various
permeable pavements are limited. However, reductions in the concentrations of total suspended
solids and associated constituents, such as metals, oils, and greases appear to be relatively high.
The fact that all permeable pavements significantly reduce the average annual runoff volume
makes them very effective in reducing pollutant loads reaching the receiving waters. Infiltration
of storm water runoff through the pavement surface will provide a degree of suspended solids
removal followed by additional removal of colloidal solids and soluble pollutants in the aggregate
sub base and sub soils. Sorption of metals to colloidal solids and within the pavement void matrix
is another removal function. Soluble organic pollutants adsorbed within the pavement void
matrix and the open graded aggregate sub base will be exposed to biodegradation over time.
Adsorption and ion exchange occur as storm water travels through the unsaturated (vadose) zone
below the aggregate base and reduce the particulate and dissolved pollutant loading to the
groundwater (saturated zone).Permeable pavement can be used to provide ground water recharge.
Some data suggest that asmuch as 70% to 80% of annual rainfall will go toward ground water recharge
(Gburek and Urban,1980). A third study by Brattebo and Booth (2003) indicates that many trademarked
permeable paver systems effectively reduced concentrations of motor oil, copper, and zinc.
Furthermore, the study found that almost all precipitation that fell on the permeable pavers infiltrated
even after 6 years of daily use as a parking area.
Reduces Heat Island Effect. Heat Island Effect occurs in areas such as a city and industrial sites that have
consistently higher temperatures than surrounding areas because of greater retention of heat. This
retention of heat is due to buildings, concrete, and asphalt.
Using TRUEGRID in these “hot spot” areas for pathways, parking lots, driveways, roofs…etc., reduces the
absorbability of solar rays and thus helps steady and cool the natural environment.
High load bearing capacity. TRUEGRID is designed with the highest load capacities of any grid system
and can withstand significant structural loads. TRUEGRID provides a stable and continuous load-bearing
surface throughout parking areas.
TRUEGRID will add to LEED Credits in the following categories.
 Water Efficiency
 Innovation & Design
 Sustainable Sites
 Indoor Environmental Quality
 Materials & Resources
 Energy & Atmosphere

TRUEGRID PRO 16” X 16” X 1.8”

TRUEGRID PRO 16” X 16” X 1.8”

US PATENT NO. 8,734,049

PROPRIETARY FEATURES:
1) X-ANCHORS (NO STAKING NEEDED)
2) 3 POINT MALE/FEMALE LOCKING TABS
3) S-FLEX JOINTS ( BUILT IN EXPANSION JOINTS
FOR SOIL MOVEMENT)
4) HOOP STRENGTH DESIGN
OTHER:
1) 100 % POST-CONSUMER RECYCLED HDPE
2) DELIVERED IN PREASSEMBLED 4' X 4' SHEETS
THAT CAN BE RECONFIGURED, AS NEEDED.

TRUEGRID PRO

TRUEGRID PRO

TRUEGRID® PRO Plus

TRUEGRID® PRO Plus