What should the tensile strength of geogrid be measured at?

The tensile strength of geogrid is typically measured at 2% strain. This specific strain level is chosen because it represents a point where the material is still exhibiting elastic behavior before significant plastic deformation occurs. At 2% strain, the geogrid demonstrates its ability to sustain loads without compromising its structural integrity, which is crucial for its effectiveness in applications such as reinforcement of soil or asphalt layers.

Measuring tensile strength at this level also provides a practical balance between capturing the material's performance characteristics while ensuring that it can be used reliably in field applications. Higher strain measurements may indicate a transition to plastic deformation, which may not reflect the material’s performance in practical uses where maintaining shape and function under load is critical. Therefore, evaluating the tensile strength at 2% strain helps engineers and designers choose materials that will function effectively under expected service conditions.