When leveling using RHGG, how many passes are required?

In road grading, particularly when utilizing a Rear-Heavy Grader Grading (RHGG) technique, achieving a smooth and level surface often requires multiple passes. The commonly accepted practice is that two passes are typically needed for effective leveling.

The first pass is usually employed to cut into the existing surface, moving material to create a rough grade. This pass aims to remove any high spots and fill in low areas to create a more uniform surface. The second pass then refines this surface, further leveling and smoothing out any irregularities left from the first pass.

By utilizing two passes, the operator can ensure that the material has been adequately moved and redistributed, leading to a flatter, more stable roadbed or surface. This method not only helps achieve the desired flatness but also facilitates drainage and prevents issues related to uneven surfaces in the future.

Understanding this process is crucial in achieving quality results while using an RHGG technique, making the two-pass requirement a standard practice in road grading operations.