Foundation excavation is a specially prepared hole in the ground, which is designed to take in the foundation of a building or other construction. Its main task is to ensure adequate depth and width to allow the foundation to be located below the level of ground freezing and guarantee the stability of the structure. The depth and type of excavation depends on the type of the ground, structure load and the type of planned foundation (e.g. plate, belt, column). Works related to the digging of foundations require specialized construction machinery and adequate protection of the walls of the excavation against slipping.