The technologies of indirect foundations frequently replace the traditional methods of dealing with the deficiency of load-carrying capacity, in the foundations carried out in the past. The use of injection piles (micropiles) has become particularly popular, so as to transfer loads from the structure to the stronger layers of soil. The use of the dynamic methods of testing piles, in terms of their quality, has become equally important. As of now, the low-stress SIT (Sonic Integrity Testing) percussion method is the subject of a particularly intense development. Its main advantages include simplicity and a short time of completion, making it possible to test virtually all completed piles. Another benefit is the possibility of testing the piles made in the past and anchored in foundations.