If the soil is swollen on the site, then the brownish piles are used. For such a design, it is not necessary to rent a construction equipment, but they build it, concreting drilled wells. This process is produced by manual drill (diameter 30 cm, the length of the rod is above 5 m). To calculate the well, the soil features are taken into account, but most often its depth reaches up to 10 m, and the radius is 0.1 m.