Tensar InterAx (NX) Geogrids

Geogrids and Geogrid Solutions and Uses

Tensar® InterAx™ geogrid is the latest and most advanced form of geosynthetic stabilisation on the market. Providing better value and cost savings than all previous Tensar geogrids, its optimised geometry results in improved confinement of granular fill and creates a more efficient stabilised layer. It can be used with a wider range and quality of aggregate types and gradations to facilitate increased flexibility.

Our sophisticated Tensar® InterAx™ geogrids are the output of 12 global teams and over 10,000 of R&D, resulting our most advanced product to date that offers improved compaction and movement restriction to deliver long-lasting performance. This is achieved by a complex structure that incorporates hexagonal, trapezoidal and triangular geometries across continuous and non-continuous ribs.

  • Tensar® InterAx™ geogrids are the best performing stabilisation geogrids Tensar have developed
  • The market leading solution to enhance the performance of roads, railways and other trafficked areas
  • Tensar® InterAx™ has optimised geogrid geometry to enhance the stabilising effect on the aggregate to provide the best Tensar mechanically stabilised layer
  • Tensar® InterAx™ adopts advanced material science to improve interaction between the geogrid and aggregate improving performance and available Tensar Value

Unique Manufacturering

The unique manufacturing process uses coextrustion to create a multi-layer product, giving InterAx the ability to accommodate aggregate nesting. The outer layers conform to the shape of the aggregate and hold it in place.

Open, Floating Hexagon

The open, floating hexagon allows for greater compliance and improved aggregate confinement under compaction and repetitive loading.

Unique Open Aperature

Three unique open aperture shapes yields a broader range of sizes and open area, allowing better compatibility with a wider range of aggregate qualities and gradations

Increased Number of Bearing Surfaces

Increased number of bearing surfaces provides improved performance of the geogrid-aggregate layer, by resisting radial displacement of the aggregate under load.

Higher Aspect Ratio

40% higher aspect ratio compared to conventional geogrids is proven to more effectively interlock and laterally restrain aggregate and enhances stiffness

Proven Savings

We help you deliver projects more efficiently. Tensar InterAx geogrid has been installed on projects around the country, achieving significant cost and time savings, proven performance, and meeting sustainability goals.

Tensar H-Series Geogrids


With Tensar H-series geogrids, engineers and contractors can reap the benefit of the optimized geometry of our advanced InterAx™ geogrid at a more economical cost.

The broader range of aperture shapes and sizes of Tensar H-series geogrids allows for better compatibility between the geogrid and multiple fill materials, improving particle confinement under compaction and repetitive loading.

Better geogrid-fill compatibility provides an effective stabilized layer with less fill material, reducing project costs and construction time.

  • Ideal for stabilizing soft subgrades, constructing access roads and improving pavement performance at a more economical cost than our advanced InterAx™ geogrid
  • Provides a resilient solution for building higher performing trafficked surfaces that can withstand the impact of severe weather and challenging environmental conditions
  • Optimized geometry that enhances the interlock of fill materials, creating an efficient stabilized layer
  • Proven to reduce initial and lifecycle costs, reduce construction time, and gain sustainability benefits on projects

Tensar TriAx (TX) Geogrids

Conventional construction practices are presenting new challenges to pavement engineers, contractors and owners due to the volatility of material costs and their availability. Construction budgets are under constant scrutiny to deliver the highest quality end product for the least amount of money. Indeed, the practice of implementing a “typical pavement section” is costing many owners both time and money due to a number of factors:

  • Asphalt and crushed aggregate pricing volatility
  • Reduced construction and maintenance budgets
  • Pavement life span being compromised due to increased trafficking or insufficient pavement structure

These factors have decision makers questioning performance estimates and the conventional strategies they once relied upon to evaluate projects and set priorities.

A growing number of transportation professionals are considering designs that incorporate Tensar TriAx® Geogrid.

TriAx, the ground breaking triangular stabilization geogrid, is one of the industry’s leading solutions for creating mechanically stabilized pavement structures.

In combination with Tensar’s engineering and design services, cost-analysis tools and site assistance, TriAx Geogrid provides a simple, reliable and affordable solution for constructing flexible pavements that deliver both reduced construction cost and long-term value.

TriAx offers a proven performance benefit for paved roads by:

  • Reducing pavement component thickness – asphalt, aggregate base and granular subbase
  • Simplifying construction
  • Lowering long-term maintenance costs

TriAx Geogrid enables you to create durable and cost efficient engineered structures through the product’s unique structure and performance properties.

Better Interlock and Confinement

The triangular geometry provides a significantly different structure than other commercially available geogrids, delivering high radial stiffness throughout the full 360 degrees.

Triangular Aperture Geometry

Full-scale research has proven that geogrids manufactured with deeper ribs and square edges outperform geogrids with rounded edges and thinner ribs.

Junction Integrity and Efficiency

TriAx Geogrids’ unique aperture geometry forms a hexagonal junction shape with superior junction strength and stiffness to mitigate radial stress imparted from a trafficked surface.

Superior Performance for Paved and Unpaved Roads

TriAx Geogrid’s near isotropic stiffness characteristics contribute to its improved performance in comparison to BX Geogrids in trafficked applications.

Enhanced "Snowshoe Effect"

The greater rib depth and radial stiffness characteristics of TriAx Geogrid are more effective in confining overlying granular fill than the traditional BX Geogrids.

Less Stress on Subgrades

TriAx Geogrid creates an enhanced, mechanically stabilized composite material for constructing over soft soils. The triangular aperture geometry more effectively dissipates the radial stress imparted by in-service loads.

Tensar FilterGrid (FG) Geogrids

When stabilizing paved or unpaved structures it is important to not only consider the appropriate geogrid product and thickness of granular fill, but also whether adequate filtration and separation of dissimilar materials will be maintained throughout the life of the structure. While Tensar TriAx geogrid frequently provides adequate confinement of the fill to achieve both filtration and separation, there are times when specifiers recommend a geotextile in conjunction with the geogrid. Tensar TriAx FilterGrid provides the superior performance to Tensar’s patented TriAx technology along with the added assurance of a non-woven geotextile – all in a single composite product.

TriAx FilterGrid stabilizes working surfaces, such as paved and unpaved roadways, airfields, crane pads and other working surfaces by providing confinement, separation and filtration. FilterGrid combines the stabilization benefits of TriAx with the separation and filtration benefits of a non-woven fabric. TriAx’s unique structure provides a high degree of in-plane stiffness through a mechanism known as lateral restraint. Lateral restraint is the ability to confine and stabilize aggregate particles within the plane of the geogrid. As granular base courses are stress-dependent materials, the confinement offered by properly designed, stiff geogrids improves the modulus of an aggregate material, improves load distribution, and maintains that modulus over a much longer period of time than an unstabilized aggregate. This confinement improves speed of construction, reduces fill requirements, and enhances the performance and durability of these working structures over time.

The non-woven filter fabric attached at the nodes of the TriAx provides separation and filtration. Fine grained subgrades, especially those consisting of low plasticity silts and clays, present separation and possibly filtration needs.

Tensar’s SpectraPave design software provides tools to assess if a non-woven separator is needed. This tool is based on guidance outlined in many resource documents including those of Cadergren, Terzaghi, Peck and Mesri where piping and uniformity ratios are set based on the soil type.


Provides aggregate stabilization, filtration, and separation.


Optimizes the structural thickness to save time and money


Permanent, safe alternative to the use of chemical stabilization agents.

Simple and Efficient

Rather than installing a geotextile and TriAx in two separate steps, FilterGrid deploys as a single layer – saving time and labor costs.

Tensar Biaxial (BX) Geogrids

Tensar International invented and advanced the biaxial form of geogrid – the original geogrid. Tensar® BX Geogrids have been used for mechanical ground stabilization in over half a million projects worldwide, including roads, reinforced foundations and working platforms.

Unlike geotextiles, Tensar® Biaxial (BX) Geogrids provide a highly effective means for reducing pressure below the trafficked surface. BX Geogrid stiffness and open apertures create a “snowshoe effect” that evenly and broadly distributes load while inhibiting particle movement at the interface between interlocked fill and subgrade. Contrast this with the less efficient “hammock effect” and frictional resistance provided by fabrics.

Tensar BX Geogrids are created using precise blends of polypropylene, copolymers and additives to resist high, short-term dynamic loads or moderate loads over longer time periods. While these products have been successfully used in a variety of applications for over 30 years, most designers working with geosynthetics today have turned to the more advanced and cost-effective technology of Tensar®TriAx® Geogrid.