Hybrid building Gilching: 56 residential units in timber-concrete construction
In the Gilching residential district, we worked with our client to show how efficiently modern multi-storey residential construction works when solid construction and timber construction go hand in hand. Two three-storey buildings with 56 owner-occupied apartments were built. As our customer has a traditional background in solid construction, our task was to ensure the planning, procurement and assistance with the professional execution of the solid timber construction.
CLT and BSH technically combined
From the first floor to the 2nd floor, load-bearing walls were made of CLT (cross laminated timber) for use.
- CLT: Thanks to the crosswise gluing, it offers high dimensional stability and takes on the static loads that were otherwise reserved for masonry or concrete.
- Glulam (glued laminated timber): We have used them specifically where high loads act at certain points, especially in the case of falls.
Efficiency on the construction site: our solutions
To optimize time and material costs, we have focused on three key details in Gilching:
- Optimized element layout to prevent waste: Instead of cutting out window openings completely from large CLT panels, we made the walls smaller. The lintels were made separately with glulam beams. This significantly reduces the waste in the joinery and lowers the costs per square meter of wall area.
- Direct screw connection to the concrete ceiling: The connection between the CLT wall and the in-situ concrete ceiling was created using screws screwed into the top. These protrude from the wood and are set in concrete directly when the ceiling is poured.
The advantage: There is no need for complex anchor systems. In addition, the timber wall immediately serves as a stable support for the slab formwork, which reduces the amount of formwork required compared to pure solid construction. - High degree of prefabrication: To ensure rapid construction progress, the CLT walls have already been ex works with weather protection film with a protective tape. This saves tedious masking on site and protects the structure immediately after erection. In addition, all ELT and HLS cables milled and prepared with millimeter precision so that the subsequent trades could install directly without any loss of time.
Support when straightening up
As solid timber construction was new territory for our client's team, we also supported the project on site. Together with our partner Matthias Mohm we supported the teams in erecting the elements and trained them in the proper use of CLT.
