What type of material should the gauge be placed on for accurate standard counts?

The gauge should be placed on asphalt, concrete, or material with a density greater than 100 pounds per cubic foot (pcf) for accurate standard counts. This is because these surfaces provide a stable and uniform base that is essential for consistent measurements. Both asphalt and concrete have predictable properties that ensure the gauge will react consistently under load, allowing for accurate readings of weight or pressure applied to the gauge.

In contrast, soft soil may compress under pressure and produce variable results, making it unreliable for accurate readings. Free-draining material might also lack the stability needed for consistent gauge placement, as it can shift over time. Grass or vegetation can introduce even more unpredictability due to their compressibility and inconsistent support, further compromising the accuracy of the gauge readings. Therefore, using a firm and dense material ensures that the gauge's ability to measure accurately is maximized.