Keystone® TW3 wall system is a proven, practical engineered earth retaining wall solution. The system consists of pre-cast concrete modular facing blocks, securely connected with Tensar® RE uniaxial geogrids. This helps to reinforce the soil behind to create a stable and maintenance-free retaining wall structure with up to 120 years design life.

To install, the Keystone TW3 concrete facing blocks are simply dry-laid without cranes required for construction. The 40kg weight of the standard 200mm high block is suitable to be handled by a two-person team.  

Keystone TW3 is a cost-effective alternative to traditional concrete retaining walls, ideally used for infrastructure works including bridge abutments, culvert and tunnel portal entrances and technically challenging retaining structures.


Tensar Keystone TW3 product image


  • Savings of up to 50% in construction costs compared to conventional construction methods such as reinforced concrete retaining walls
  • High-strength, positive connection to permanently support the face, even under severe dynamic loading such as earthquakes
  • Versatile system that can accommodate curves, stairs and other design requirements
  • Quick and easy to install without cranes, as it is simply dry-laid which helps to reduce construction costs
  • High pH associated with concrete blocks does not affect the durability and functionality of HDPE geogrid reinforcement during the life of the structure
  • Design support service using state-of-the-art software, TensarSoil
  • System certified by BBA (British Board of Agreement) with 120-year design life for infrastructure, industrial and residential applications

Our team of experienced engineers can help you with your next project using TensarSoil design software, available free to Geofabrics clients.

Tensar Keystone TW3 body image


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