Community apartment building, Gretzenbach
2023
In the village center of Gretzenbach in the canton of Solothurn, a timber building with twelve apartments and a village store was built. The balconies cantilever over 3.5 meters - without any disruptive supports. An ingenious, suspended construction makes this possible.
The project
The new building at Köllikerstrasse 29 in Gretzenbach consists of four full storeys and a basement. The first floor will contain retail space and a common room, with apartments above. The entire building above ground level will be built as a timber frame construction, with the exception of the interior walls on the first floor and the bracing staircase.
The construction method
The cantilevered balconies are a special feature of this building. We developed a suspended construction to eliminate the need for disruptive supports. Steel cables absorb the forces of the balconies and transfer the forces to the supporting structure of the outer walls via a bracket. You can twist and turn this ingenious detail however you like.
Construction Data
- Usable floor space: 1,500 m2
- Glulam: 160 m3
- Solid wood: 85 m3
- Solid wood panels: 55 m3
Construction costs
- BKP 1-9: CHF 6.9 Mio
Services of Timbatec
- SIA Phase 31 Preliminary project
- SIA Phase 32 Construction project
- SIA Phase 41 Tendering and comparison of offers
- SIA Phase 51 Execution project
- SIA Phase 52 Execution
- SIA Phase 53 Commissioning
- Statics and construction
- Specialist planning fire protection
- Fire protection quality assurance QSS1
- Fire protection quality assurance QSS2
- Cost estimation
- 3D and 2D work planning
Client
Bürgergemeinde Gretzenbach
5014 Gretzenbach
Architect
Oegerli Markus Architekten SIA AG
4600 Olten
Timber construction
Schaerholzbau AG
6147 Altbüron