Installation Instructions

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All installation instructions are the same as for gravity retaining walls except for the addition of
geogrid. Geosynthetic reinforcement is an engineered product that is typically comprised of
polypropylene, polyester or other high tensile material. Used in conjunction with segmental retaining
wall blocks, it helps stabilize the soil mass behind a wall. Depending on the wall design, the length
and the number of grid layers will vary. Please remember, plasticized snow fencing is not a high
tensile material and should not be used in place of geogrid.
Generally, stronger geogrids must be rolled out perpendicular to the retaining wall. As it is unrolled,
it is in the same direction that it should be installed. Bidirectional grids are the same strength in both
directions and can be rolled out parallel to the retaining wall or perpendicular to the retaining wall.
If the geogrid depths are the same as the roll width, it may be more ecient to roll out the geogrid
parallel to the retaining wall. If the geogrid depths called for are dierent than the roll width or if the
wall curves, it is best to roll out the geogrid perpendicular to the retaining wall.
GEOGRID REINFORCED WALLS
RETAINING WALLS
Cap Block
Clifton Block
6°
Finished Grade
6”
6” Minimum Compacted
Granular-Base
Leveling Pad
1st Layer
2nd Layer
4”ø Drain Tile (Elev. Varies)
12” of Free Draining Aggregate
Geosynthetic
Reinforcement
Other Layers
24”