The steel profiles are anchored below the excavation level of the construction pit to ensure the strength of the earth retaining structure. If necessary, ground anchors are added. Then, a filler is placed between the steel profiles to prevent soil from falling through. This filler, which extends just below the excavation level, can consist of wooden beams, prefabricated concrete slabs, or steel plates.

With a high-frequency vibratory hammer with variable moment, we vibrate the steel profiles into the ground. This technique prevents vibrations at low frequencies and thus avoids damage to buildings. Within the influence zone of existing buildings, we do not vibrate steel profiles, as recommended by Buildwise in the execution sheet for berlinerwanden.