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Having completed a roadway design using Tensar's online software, you now have a proposal that adopts the quantified performance of the Tensar mechanically stabilized granular layer.

So, to ensure your project ultimately benefits from this calculated trafficking performance, you can now generate a supporting specification to accompany your completed design. You will have already seen that there are several specification options available to you at the end of the design process.

Guidance on selection is provided below.

Components of a specification

What can be specified?

  • Calculated mechanically stabilized layer thickness to achieve project performance targets
  • Granular fill component with required grading and strength characteristics
  • Geogrid component - identified with tabulated characteristic parameters

How to be confident the designed performance has been achieved

  • Quantified structural contribution of the geogrid component
  • Bespoke design software applying geogrid contribution
  • Confirmed design method calibration

Specification content is aimed at providing the most effective protection of the performance built-in to your completed design and so including as many of the "What" and "How" components above increases the specification strength accordingly.

The recommendations on specification selection that follow are provided to allow you as a designer to reduce the risk of losing the performance achieved in your design assessment and the time you may need to spend assessing alternative proposals typically based on product comparisons.

Available specification options have been color-coded here and in the Tensar software specification selection window.

  Recommended specification formats
  Recommended minimum level specification format
  Not recommended


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