StrataGrid™ - Knitted Polyester Uniaxial Geogrid

Stratagrid is a uniaxial geogrid manufactured from knitted polyester. It is available in strengths from 40kN/m to 400kN/m although the most typical strengths used for constructing Stratagrid reinforced soil slopes would be either 40kN/m, 60kN/m and 80kN/m

The Stratagrid is laid in horizontal layers (typically between 300mm and 600mm apart vertically) with compacted site won or imported backfill between each layer. The interaction between the Stratagrid and compacted backfilll stiffens the ‘reinforced soil block’ enabling far steeper face angles to be achieved than without the use of a geogrid. Without a geogrid a soil would typically stand at an approximate face angle of 18 degrees but by incorporating geogrids layers as described face angles of 70 degrees are regularly achieved.

Where a Stratagrid solution is appropriate it is a much more cost effective and sustainable solution that a steel or concrete solution.

Once the Stratagrid is buried in layers within the backlfill it is protected from UV radiation, so any degradation is minimal. Stratagrid can be used to design solutions with a design life of up to 120 years

The pH of soils in the ground can reduce the strength of Stratagrid. This is accounted for in the design process by applying a ‘reduction factor’ to the strength of the Stratagrid.