Determining the number of soil boring in the construction site " Article"

There is no hard-and-fast rule exists for determining the number of borings are to be advanced. For most buildings, at least one boring at each corner and one at the center should provide astart.
 Spacing can be increased or decreased, depending on the condition of the subsoil. If various soil strata are more or less uniform and predictable, fewer boreholes are needed than in nonhomogeneous soil strata.

The following table gives some guidelines for borehole spacing between for different types of structures: