Structural Retaining Walls

KeySystem™ II & III

KeySystem II and KeySystem III have been designed to the highest standards and unique requirements of the transportation sector. Both wall systems are comprised of dry-cast concrete Keystone Compac® modular units* and NTPEP-evaluated TenCate Miragrid® XT polyester geogrid soil reinforcement by TenCate Geosynthetics. The patented Keystone Compac, a leading commercial retaining wall product, features an open core design and a pin connection system.

The Keystone KeySystem III retaining wall system has been evaluated by the Federal Highway Administration’s (FHWA) Innovations, Developments, Enhancements and Advancements (IDEA) program. The Geo-Institute of the ASCE administered the evaluation and issued a comprehensive report which is available in the RESOURCES tab for viewing or download. Also available in the Resources below is a DOT Acceptance Map, showing states where KeySystem II / III are currently approved or accepted as an earth retention system. For product information and limitations, refer to individual states’ Approved Products List (APL) or Qualified Products List (QPL).

*KeySystem II uses Compac II units; KeySystem III uses Compac III units.

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Before specifying a specific product, please confirm availability with your local Keystone producer.

KeySystem III - Tri-plane

Height Width Depth Weight
8" 18" 12" 68-82 lbs
203mm 457mm 305mm 31-37 kg

Unit color, dimensions, weight & availability varies by manufacturer.

Units/Sq.Ft.
1

KeySystem III - Straight Split

Height Width Depth Weight
8" 18" 12" 68-82 lbs
203mm 457mm 305mm 31-37 kg

Unit color, dimensions, weight & availability varies by manufacturer.

Units/Sq.Ft.
1

KeySystem II - Tri-plane

Height Width Depth Weight
8" 18" 12" 76-89 lbs
203mm 457mm 305mm 34-40 kg

Unit color, dimensions, weight & availability varies by manufacturer.

Units/Sq.Ft.
1

KeySystem II - Straight Split

Height Width Depth Weight
8" 18" 12" 76-89 lbs
203mm 457mm 305mm 34-40 kg

Unit color, dimensions, weight & availability varies by manufacturer.

Units/Sq.Ft.
1