TensarTech® TW1 Wall-systemet

3 Component System
1 Single Source for Design & Supply
25+ Years of Successful projects
  • Modular block faced reinforced soil retaining wall system – designed and supplied from a single reliable source
  • BBA certified and rigorously tested for stability, durability and load bearing capacity
  • Aesthetically versatile capable of accommodating curves and other design requirements
  • Smooth and split-face block options available in a choice of colours
  • High strength connection to permanently support the face - even under severe dynamic loading

The TensarTech TW1 Wall System delivers substantial savings, as well as long-term durability and architectural versatility, compared to other retaining wall construction methods.  

The system is comprised of a pre-cast concrete modular block facing, securely connected to Tensar uniaxial geogrids which reinforce the soil behind, to create a stable structure with up to 120 year design life.  

The TW1 concrete facing blocks, which form an 86° face angle, are simply dry-laid. No propping of the face is required. No cranes are required for construction: the weight of the standard 150mm high block is suitable for manual handling. Their block geometry allows corners, curves, stairs and other features to be incorporated easily, with a variety of colours available. 

System Components

The TensarTech TW1 System includes advice, training and services from Tensar’s design and on-site teams, as well as three specific products.  These are Tensar uniaxial geogrids (high density polyethylene with extremely high durability and no corrosion potential), TW1 modular blocks (high strength, durable factory produced pre-cast concrete blocks) and Tensar TW1 connector – for high strength connection between blocks and geogrid reinforcement. 


Design Software for TensarTech® TW1 Wall System

The TensarSoil design program allows the design engineer to produce designs for reinforced soil walls, slopes and bridge abutments.

Request TensarSoil

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Single-Source Solution

The components of the TensarTech TW1 system have been specifically designed to work together for optimum efficiency and performance. High-strength, low-absorption concrete blocks, high-shear strength connectors, and Tensar uniaxial geogrids work together to form a reinforced soil wall system that meets or exceeds the industry standard.  Tensar’s experienced engineers, using our sophisticated TensarSoil software, can provide everything from free application suggestions to a full design and supply service.

No Fuss - No Risk Construction – Simple and Rapid

With TensarTech TW1 systemsthe modular block facing requires no heavy lifting equipment, the interlocking block geometry makes placement and alignment placement of the geogrid reinforcement and connection to the block face requires no specialist skills. The rest is straightforward earthworks. Typically, no structural foundation is necessary, mobilisation costs are minimal and staged construction is easily accommodated. Tensar can provide detailed construction drawings as part of the design and supply service, and site assistance is available when needed. No fuss, simple and quick.   

The Strength Behind the TensarTech TW1 System: Tensar Uniaxial Geogrid 

Tensar uniaxial geogrids are manufactured from select grades of HDPE resins that are highly oriented and resist deformation when subjected to even high tensile loads for long periods of time. Their open aperture structure interlocks with natural fill materials, making them ideal for reinforced soil applications. The high pH associated with concrete blocks does not affect the durability and functionality of HDPE geogrid reinforcement during a life of up to 120 years. 

Independent Assessment and Approval 

Highway Authorities Product Approval Scheme (HAPAS) was set up in 1995 to recognise innovative products and systems used in UK highway works. It leads to a Certificate or Report which provides highway engineers with product performance, design and installation data invaluable to the product choice and project planning processes. The TensarTech TW1 System and selected Tensar uniaxial geogrids have been certified by the British Board of Agrément (BBA) and awarded HAPAS approval. The BBA certifies that Tensar geogrids and the TensarTech TW1 system have been evaluated independently as fit for their intended use.