Construction products detail

Vibro stone columns

Vibro stone columns are unreinforced pile-like structural elements. They belong to the group of displacement piles and can be used as load-bearing or foundation elements for transferring loads from structures to load-bearing soil strata. The structural elements are produced on site in the in-situ subsoil.

Regulatory framework

There are no conclusive technical rules for the design and execution of these structural elements. DIBt grants general construction technique permits (aBG) for corresponding applications.

The executing company must submit a declaration of conformity stating that the executed columns comply with the provisions of the construction technique permit.

The use of these techniques for ground improvement is permitted from a regulatory point of view and does not require a construction technique permit. The specifications set out in Eurocode 7 (EN 1997) apply.

National procedure

A national technical approval (abZ) and/or oder general construction technique permit (aBG) is granted upon application (see Model Building Code (MBO), Sections 16a(2) and18(2) and (4)). This also applies to amendments and supplements to, or renewals of existing approvals and/or construction technique permits.

No formal requirements apply. The following information is needed: name and address of the applicant, description of the product and/or construction technique and its field of use or application, type of decision required (new decision, amendment or supplement to, or renewal of, an existing decision).

Please feel free to use the template below.


new decision
valid until
Subject concerned Applicant Decision no. Validity
from / to
Betonrüttelsäulen Keller Grundbau GmbH Kaiserleistraße 8 63067 Offenbach Z-34.2-2 Z: 05.06.2019
G: 02.03.2024
Vermörtelte Stopfsäulen (VSS), Fertigmörtel-Stopfsäulen (FSS) und Beton-Stopfsäulen (BSS) Keller Grundbau GmbH Kaiserleistraße 8 63067 Offenbach Z-34.2-3 Z: 04.10.2021
G: 03.10.2026
Rüttel-Ortbeton-Pfähle (ROB-Pfähle), Rüttel-Stopfbeton-Säulen (RSB-Säulen), Vermörtelte Rüttelstopfverdichtungssäulen (RSVv-Säulen) BAUER Spezialtiefbau GmbH BAUER-Straße 1 86529 Schrobenhausen Z-34.2-5 Z: 02.08.2019
G: 03.08.2024
Ortbetonrüttelsäulen (ORS) Ortbetonstopfsäulen (OSS) Stump-Franki Spezialtiefbau GmbH Walter-Gropius-Straße 23 80807 München Z-34.22-201 Z: 23.07.2019
G: 25.07.2024
Rüttel-Betonsäulen (RBS) und Fertigbeton-Stopfsäulen (FBS) ECOSOIL Ost GmbH Laugkfeld 29 01968 Senftenberg Z-34.22-206 Z: 11.12.2020
G: 03.01.2026