9.2.3 Grading & Serrating


Grading involves shaping of the rock slope into a more stable configuration. It may include flattening the slope, leaving benches in the slope face, or sculpting the slope face to a more natural appearance (figure 3).



Figure 3: Grading of slope



Serrating is cutting of regular, low-height benches into a slope. Generally, the benches are 1-2 m in height and width and extend over the full height of the slope. This technique is normally used on soil or loose, weathered rock slopes that can be excavated by mechanical means.  It is frequently used where vegetation is expected to become established.