Wehntalerstrasse 52, Zürich
2021
The replacement building at Wehntalerstrasse 52 in Zurich-Unterstrass is erected. With the use of clay panels, sheep's wool insulation, flexible walls and TS3 technology, the timber construction is highly interesting from an ecological and technical point of view.
The project
The 5-story apartment building on Wehntalerstrasse was constructed with TS3 CLT panels. Thanks to the biaxial load-bearing timber slabs, the cantilevered balconies and oriels on all sides could be efficiently and easily executed in pure timber construction.
The ceilings span around the concrete staircase core to the exterior walls, so that no load-bearing components are required inside the building. The interior walls, as well as the building services, were designed so that individual rooms can be easily swapped between apartments.
The construction
The basement, as well as the staircase core, was made of concrete. The entire rest of the building was constructed in pure wood. The massive wooden ceilings with TS3 technology span from the core to the outer walls. The exterior walls are built in timber frame construction. A hollow box element was used under the greened flat roof. All slabs are designed as discs and are braced over the concrete core.
The challenge
The building has cantilevered structural elements (balconies and bay windows) on all four facades. Thanks to the TS3 technology, wooden slabs supported in two axes, this challenge could be solved very easily and efficiently.
Construction Data
- CLT boards/ 3-layer boards 160 m3
- BSH / solid wood 35 m3
- Wood-based panels 15 m3
Construction costs
- BKP214 CHF 670,000.-
Services of Timbatec
- SIA Phase 31 Preliminary design
- SIA Phase 32 Construction project
- SIA Phase 41 Tendering and comparison of offers
- SIA Phase 51 Implementation project
- SIA Phase 52 Execution
- SIA Phase 53 Commissioning
- Structural analysis and design
- Planning of building physics
- Fire protection planning
- Fire protection Quality assurance QSS2
- cost estimation
- Technical site management and site inspections
Client
Beatrice Rasper Wellmann + Caspar Wellmann
8057 Zurich
Architect
Wellmann Architekten AG
8004 Zurich
Timber construction engineer
Timbatec Holzbauingenieure (Schweiz) AG Zurich
8005 Zurich
Photography
Wellmann Architekten AG
8004 Zurich
More than rent
TEC21, Issue No. 12/2022 – Where a shingle house for a family stood in Zurich Unterstrass, a multigenerational house in wood hybrid construction with eight apartments has recently been built. In a limited space - but with affordable rents - the private developer and the residents found an alternative to conventional financing, construction and housing models. (Report in German)
