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Ceremonial groundbreaking for timber hybrid high-rise CARL realised by Ed. Züblin AG and ZÜBLIN Timber on behalf of Baugenossenschaft Arlinger eG in Pforzheim. copyright: Baugenossenschaft Arlinger eG
Ceremonial groundbreaking for timber hybrid high-rise CARL realised by Ed. Züblin AG and ZÜBLIN Timber on behalf of Baugenossenschaft Arlinger eG in Pforzheim. copyright: Baugenossenschaft Arlinger eG

Press release -

ZÜBLIN starts construction work on CARL timber hybrid high-rise in Pforzheim

  • ZÜBLIN Subdivision Karlsruhe and ZÜBLIN Timber building 14-storey architectural highlight made of wood and concrete for Baugenossenschaft Arlinger
  • Contract for three-part residential building complex with value of almost € 30 million
  • Completion scheduled in October 2023

Pforzheim, 26 October 2021 Aiming high with wood: Ed. Züblin AG, in the capacity of general contractor, is teaming up with ZÜBLIN Timber to build the CARL timber hybrid high-rise in Pforzheim on a turnkey basis for Baugenossenschaft Arlinger eG. The new 14-storey building will reach a height of around 45 m and, with its striking façade, is set to become an architectural landmark. The residential construction project is a timber construction highlight that also includes the turnkey construction of two adjoining buildings with four and six storeys each as well as a joint underground car park. The contract for ZÜBLIN has a total volume of € 29.2 million. The design for the three-part building complex comes from the Pforzheim-based architectural firm Peter W. Schmidt.

Work on the project in Carl-Hölzle-Straße in Pforzheim’s Arlinger district began with a ceremonial groundbreaking on 25 October. Completion is scheduled for November 2023 after some two years of construction. In addition to a total of 73 new flats including underground parking spaces, the building ensemble will also house a day care centre and a bakery with a daytime café.

Construction elements made from domestic wood

“For us at Ed. Züblin AG, the CARL timber hybrid high-rise is an internal teamwork project that allows us to contribute our broad range of expertise in different areas of building construction and structural engineering,” says the project’s senior site manager, Michael Jäger, from the Turnkey Construction Business Unit of ZÜBLIN Karlsruhe. The unit will be realising the construction project together with ZÜBLIN’s Structural Engineering Business Unit in Karlsruhe and a team of timber construction experts from ZÜBLIN Timber.

The use of the hybrid construction method results in a special feature during construction of the high-rise project. For structural reasons and fire protection, the foundations, basement, underground level and staircase are being built of reinforced concrete. As ZÜBLIN project manager Andre Essig explains, “The final height of the building will therefore become apparent relatively soon after start of the structural work, after only about three months.” The reason: Instead of being built floor by floor, as is usual in building construction, the first phase involves the construction of only the core of the staircase using slipform construction. The extensive timber construction work will begin after that. The construction elements, prefabricated from local timber at ZÜBLIN Timber in Aichach, will be completely assembled within a few months, between February and October 2022. The construction of the 14-storey building will include around 2,900 m² of LENO® ceiling modules made of cross-laminated timber for wood-concrete composite ceilings, approx. 1,500 m² of timber-frame exterior walls with integrated supports made of beech, a façade formwork made of silver fir, and almost 1,000 m² of LENO® partition walls made of cross-laminated timber and gypsum fibre boards.

Energy-efficient to KfW standard 55

The timber hybrid high-rise stands out as a particularly sustainable building, and not only because of the extensive use of wood as a climate-neutral building material. The construction method also ensures an especially effective thermal insulation: The new project from Baugenossenschaft Arlinger is certified energy-efficient to KfW Standard 55, which means it will only require 55 percent of the energy of a conventional building.

Further details on the CARL timber hybrid high-rise can be found in a video animation of the project and at

Facts & Figures


ZÜBLIN Subdivision Karlsruhe, Business Units Turnkey Construction and Structural Engineering

ZÜBLIN Timber GmbH


€ 29.2 million




Peter W. Schmidt Architekten GmbH, Pforzheim


Baugenossenschaft Arlinger eG, Pforzheim


Gross floor area: 14,706 m2

Gross volume: 46,185 m3



Stuttgart-based Ed. Züblin AG, with more than 13,000 employees and an annual output of around € 4 billion, is one of Germany’s largest construction companies. Since its foundation in 1898, ZÜBLIN has been successfully realising challenging construction projects in Germany and abroad and today is the STRABAG Group’s leading brand for building construction and civil engineering. The company’s range of services covers all construction-related tasks – from complex turnkey construction, civil engineering and tunnelling to construction logistics, structural maintenance, ground engineering and timber or steel construction. In recent years, ZÜBLIN has been promoting the topics of digitalisation, LEAN.Construction and sustainability and – supported by the many years of experience of its Zentrale Technik competence centre – is also increasingly offering integrated design and construction from a single source as a general planner. When it comes to partnering, ZÜBLIN has set new standards with its teamconcept partnering model, which has proven its worth on the market for more than 25 years. Current construction projects of the company, a subsidiary of globally operating STRABAG SE, include the EDGE East Side Berlin high-rise project, the Rinsdorf and Rälsbach viaducts on the A45 motorway and the Boyneburg Tunnel on the A44. More information is available at

Press contacts

Birgit Kümmel

Birgit Kümmel

Press contact Head of Corporate Communications Germany/Benelux/Northern Europe +49 221 824-2472
Sabine Appel

Sabine Appel

Press contact PR-Manager +49 221 824 2159

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