When preparing a test surface, voids exceeding what depth should be filled?

In earthwork and construction practices, preparing a test surface is essential to ensure a stable and smooth foundation for subsequent layers of soil, asphalt, or concrete. The standard for filling voids is set to ensure proper compaction and prevent issues such as settling or uneven surfaces that can impact the integrity of the construction.

When it comes to the allowable depth of voids, filling voids exceeding 1/8 inch is critical because this depth is often seen as a threshold for maintaining a smooth and even surface. Voids greater than this can compromise the material's ability to bond with layers above, leading to long-term problems, such as cracking or structural instabilities. By ensuring that any voids greater than 1/8 inch are filled, workers can enhance the durability and reliability of the surface being prepared.

Other depths mentioned, like 1/4 inch, 1/2 inch, and 3/8 inch, while they may also be thresholds in various contexts, do not adhere to this particular standard of filling voids to ensure an adequate surface for construction. Thus, adherence to the 1/8 inch guideline is critical for quality construction practice.