Certain Uniaxial (UX) geogrids are oriented along the longitudinal, "machine direction" of an extruded sheet of polymer, thus yielding a grid structure consisting of long narrow ribs. Other products utilize polyester yarns to render extremely high allowable strengths at deficient strains. Given their unique properties, Uniaxial geogrids are ideal for both wall and slope applications such as retaining walls, landfill liner systems, embankments over soft soils, and very steep earthen slopes. Uniaxial Geogrids are designed to provide strength in a single direction, hence the prefix “Uni”. Many times, reinforcement in a singular direction is all that is necessary in retaining wall or slope design, as nearly all opposing forces point either towards the face of the wall or down the slope.
Uniaxial Geogrids are typically more economical than other types of geogrid because they are simpler by nature to manufacture. When attached to the face of a retaining wall, they provide a mechanical layer to support and mitigate any forces pushing against the face of the wall. Ultimately, this reduces the amount of required excavation, lowers cost, and opens an opportunity to build larger, longer lasting walls. When spaced appropriated between lifts of soil or aggregate, uniaxial geogrid disperses threatening loads across the entirety of the system to provide a mechanical interaction between the geosynthetic layers and the fill materials. This leads to an overall increase in the integrity of the wall or slope.