Soil Classification Symbols
A Sand/Rock, good for foundations, however problems may be encountered wth site excavation
and trenched etc.
S Stable site - generally the lightest footing design is applicable.
M Moderatley Reactive. The majority of clay sites fall into this category.
H Highly reactive clay sites requiring heavier than normal footing designs. Most "Black Soil" areas are at least
a "H" class soil.
E Extremely Reactive clay sites. These are not common, however results in very expensive footings.
P Problem Site. This may be Mine Subsidence, uncontrolled or controlled fill greater than 400mm in depth,
landslips, or soft bearings/collapsing soils and trees near the construction area.
D A sub-classification had been introdiced to indicate deep seated movement. The sub-classification is required
for reactive sites, classes M, H and E and is symbolised by the addition of D. The full classification for these
areas would simply be M-D, H-E or E-D.