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Tradition has a future with us.

The company Stump-Franki Spezialtiefbau GmbH came into being in April 2019 with the merger of Stump Spezialtiefbau GmbH and FRANKI Grundbau GmbH & Co. KG. Both companies possessed many years of experience and expertise, to the benefit of the company’s future operations.

Stump Spezialtiefbau GmbH offered a range of services including the restoration and preservation of historic buildings, tailored solutions for commercial construction and the turnkey development of ambitious infrastructure projects. On the other hand, FRANKI Grundbau GmbH & Co. KG was a leading specialist in complete civil engineering solutions.


Edgard Frankignoul invents the FRANKIPFAHL, an in-situ concrete driven pile with an enlarged pile toe.

After a patent was granted for the FRANKIPFAHL, the Belgian company FRANKIPFAHL is founded.

Projects are completed in Europe, Egypt, Russia, China and Hong Kong.

FRANKIPFAHL Baugesellschaft opens its doors in Dusseldorf.

STUMP Bohr GmbH is founded in Munich as an affiliate of Stump Bohr AG, Zurich. Stump Spezialtiefbau GmbH is the first specialist civil engineering company to receive general building approvals from the Deutsches Institut für Bautechnik (German Institute of Structural Engineering) for its Stump Duplex anchor and Stump pipe pile systems.

Integration of Stump’s activities into SUSPA Spannbeton GmbH to maximise synergies. New branches open in Langenfeld, Berlin and Hanover.
Strand anchor systems are included in the service portfolio from this date on. Valuable suggestions for further anchor system developments are implemented in the area of prestressed concrete. The jet grouting method of fabricating solidified bodies adds an extra feature to the product range.

Full displacement screw piles are introduced as the ATLAS system at FRANKI.

After the German reunification, STUMP Bohr GmbH opens another branch in Chemnitz, the success of which is in large part attributed to the well-trained staff. Brickwork and concrete sealing are added to the product range. 

Roll-out of the diaphragm wall technique at FRANKI.

Change of name from FRANKIPFAHL Baugesellschaft to FRANKI Grundbau.

An affiliate of STUMP Bohr GmbH is established in Prague.

The company portfolio expands with the integration of Brechtelterra Spezialtiefbau und Umwelttechnik GmbH, so all the services for creating complex construction pits are now available under the one roof. The company is renamed Stump Spezialtiefbau GmbH.

The FRANKI Grundbau headquarters move from Dusseldorf to Seevetal, near Hamburg.

75th anniversary of the company. The Edgard Frankignoul Sponsorship Award is announced for the first time at TU Braunschweig.

At the same time, Ingenieurservice Grundbau GmbH, isg, a specialist planner for foundation works, construction pits and geotechnical measurement technologies, is established as an affiliate of FRANKI Grundbau.

New FRANKI Grundbau branch offices in Berlin and Frankfurt am Main facilitate faster service.

Stump Spezialtiefbau GmbH is acquired by the PORR Group in January 2014, strengthening its international presence. The company is based in Berlin, while the central machine maintenance compound and a dedicated production facility for grouted anchors and micro piles is located in Colbitz in Saxony-Anhalt.

The FRANKI Group achieves around 70 million euros in revenue and employs around 230 staff.


FRANKI Grundbau GmbH & Co. KG, based in Seevetal, is acquired by the PORR Group. A decision is made to invest in the construction of new Atlas devices and FRANKI pile drivers. Extensive further investments are made in new special equipment such as rotary drilling rigs, Fundex bored pile drivers and cable excavators.  

A new repair facility for cable excavators and rotary drilling rigs is constructed in Coblitz in Saxony-Anhalt, previously a central compound for the maintenance of machines and a production facility for grouted anchors and pin piles.

Stump Spezialtiefbau and FRANKI Grundbau merge to form Stump-Franki Spezialtiefbau GmbH in April 2019.