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Geogrid Reinforcement Chart
Printable Document(.pdf)
Reinforcement Chart

Match your wall to the conditions below to find which width and the number of layers of AB Reinforcement Grid you will need. To determine the number of rolls needed, multiply the length of your wall (in feet) by the number of layers needed, and then divide by 50 (the length of a roll of geogrid). Typically most soils will be considered clay,for sand conditions outlined in the table the soil must be a clean, granular material. Click here for more information on soil types and descriptions.
Soil Reinforcement Chart for Residential Wall Applications
Condition Above Wall WALL HEIGHT AB Stones of the AB Collection
AB Europa Collection
CLAY SOIL SANDY SOIL CLAY SOIL SANDY SOIL
No. of Layers Width (W) No. of Layers Width (W) No. of Layers Width (W) No. of Layers Width (W)
3 ft (0.9 m) 0 0 0 0 0 0 0 0
4 ft (1.2 m) 2 3 ft 0 0 2 3 ft 0 0
5 ft (1.5 m) 3 3 ft 0 0 3 3 ft 3 3 ft
6 ft (1.8 m) 4 4 ft 4 4 ft 4 4 ft 4 4 ft
3 ft (0.9 m) 2 3 ft 0 0 2 3 ft 0 0
4 ft (1.2 m) 2 3 ft 0 0 2 3 ft 2 3 ft
5 ft (1.5 m) 3 3 ft 3 3 ft 3 3 ft 3 3 ft
6 ft (1.8 m) 4 4 ft 4 4 ft 4 4 ft 4 4 ft
3 ft (0.9 m) 2 3 ft 0 0 2 3 ft 0 0
4 ft (1.2 m) 2 3 ft 0 0 2 3 ft 2 3 ft
5 ft (1.5 m) 3 4 ft 0 0 3 4 ft 3 3 ft
6 ft (1.8 m) 4 4 ft 4 4 ft 4 4 ft 4 4 ft
Soil reinforcement increases the strength of the wall by creating a reinforced mass of soil behind the blocks. The weight of the reinforced soil mass combines with the blocks for a heavier, stronger wall. The above chart is for estimating geogrid quantities only. *For walls with driveways above, on the last layer of geogrid, it will need to be extended back 7 ft (2.1 m). The geogrid must be installed perpendicular to the wall (rolled out from the front of the block to the back of the excavated area).


Example: Using a block from the AB Collection, a 5 ft high wall (1.5 m) built in sandy soil with a level surface above the wall requires three layers of geogrid, 3 ft wide (0.9 m).
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