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Design Benefits The Strata solution considers state-of-the art product manufacturing and systems development while addressing fundamental engineering principles based upon traditional geo- mechanics and polymeric reinforcement design. Strata “systems” are classified as geosynthetic reinforced soil structures, a subset of mechanically stabilized earth (MSE) systems. These systems use recognized technology that has been evaluatedand accepted by major agencies, including the Federal Highway Administration, US Army Corps of Engineers, and other state and government agencies as well as international acceptance. MSE systems are simply defined as soil structures comprised of multiple layers of inclusions (geogrid) that act as reinforcement in soil placed fill. MSE structures are categorized into two major groups:

1. Slopes – structures in which the face is ≤ 70° from horizontal
2. Walls – structure in which the face is > 70° from horizontal

Embankments represent a special class of slopes or walls where soil reinforcement is used to stabilize and construct a fill structure having a smaller footprint than what could be constructed with the soil alone. Embankment stabilization is common when constructing roadways or other structures over soft, weak foundation materials.

MSE structures are designed using accepted guidelines that address the unique structural requirements for each configuration, wall or slope. Walls are commonly designed using Rankine or Coulomb earth pressure theory to predict design reinforcement loads and overall reinforced soil geometry. Slopes and embankments commonly utilize limit equilibrium methods such as Bishop’s Method of Slices to evaluate structural stability. Limit equilibrium methods are also utilized to evaluate the overall/global stability of retaining walls. Regardless of the design method, Strata products can be designed and installed to meet the challenge.

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