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CornerStone is designed for use in gravity retaining wall structures and mechanically stabilized, geogrid-reinforced soil retaining systems. The lug design, wedged shape, and two-inch lateral allowance in the interlock, make it possible to design 90° and 45° inside or outside corners.

Sold by the individual piece.

Weights & dimensions are as follows:
Flat Face 100 Unit – 8″x 18″x 12″ – 83 lbs
Flat Face 100 Cap – 8″x 18″x 12″ – 118 lbs
Flat Face 100 Corner – 8″x 18″x 9″ – 98 lbs
Flat Face 50 Cap – 4″x 18″x 12″ – 55 lbs
Flat Face 50 Cap, Straight Sides – 4″x 18″x 12″ – 64 lbs

Detailed information and project photos

Technical Information

Additional information

Weight N/A
Dimensions N/A

Flat Face 100 Cap, Flat Face 100 Corner, Flat Face 100 Unit, Flat Face 50 Cap, Flat Face 50 Cap, Straight Sides


Gray, Summit Blend


Orders are processed Monday-Friday during business hours.

For branch pickups, please allow 24-48 hours for your order to be ready. Store hours vary by branch location and season. You can view all branches and hours here

Local delivery is available for shipments between 1000 lbs and 140,000 lbs within a distance of 60 miles. Review product descriptions for specific product weights.

For deliveries, please allow up to 4 business days.

Note: Mutual Materials cannot split-ship items in a single transaction.

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