1. A post hole borer is first employed to bore a hole up to a point just above the required depth.
2. The rod is pushed or driven carefully until the vanes are embedded at the required depth.
3. At the other end of the rod just above the surface of the ground a torsion head is used to apply a horizontal torque and this is applied at a uniform speed of about 0.1 degree per second until the soil fails, thus generating a cylinder of soil.
4. The area consists of the peripheral surface of the cylinder and the two round ends.
5. The first moment of these areas divided by the applied moment gives the unit shearvalue.