Wood instead of concrete. Quite simple.

15.11.2020

The first four-story column-and-slab structure made of wood is being built in Frenkendorf in Basel-Land. With the multi-family house "Fasanenhof" with 15 apartments, the TS3 technology proves its potential. The people involved are enthusiastic.

The construction industry The construction industry is on the verge of a radical change. large buildings. TS3 makes large areas made of wood possible. This means that wood can replace traditional reinforced concrete in many projects - which is good for the climate. The technology is the result of 10 years of research and development by Timbatec together with the Berner University of Applied Sciences BFH AHB in Biel and ETH Zurich. With the four-story apartment building in Frenkendorf is more than proof of concept.

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The CLT panels are easy to install on the columns, and the wood remains visible on the columns and ceilings.

During a tour of the construction site with invited guests, the architect and the project manager will share their experiences with the new technology. "Investors are looking for investment properties with the best possible profitability. Convincing the building owner of the timber construction option convince them often takes time and energy," says architect Andreas Scherer. "During the convincing phase, we have to continue planning the building project in different material variants. That's where TS3 plays into our hands. With TS3 we can we can plan in concrete and build in wood. Planning with the two-dimensional load-bearing cross laminated timber panels is similar to projects in reinforced concrete."

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Simon Müller, Site Manager Scherer Architekten, Stefan Zöllig from TS3 and architect Andreas Scherer (from left) arepleased with the successful construction.

Timber construction is the better solution
"We are an office that is comprehensively comprehensively committed to sustainability," emphasizes Scherer of Scherer Architekten AG. "It makes absolute sense to replace energy-intensive materials with less energy-intensive ones. That's why, wherever possible and sensible, we try to replace steel and concrete with wooden structures. In the case of the "Fasanenhof" we were able to save almost 600 tons of CO₂ by switching from concrete to wood."

"It doesn't affect us much with the TS3 joint. We can do our normal processes," explains Benjamin Kaiser, project manager at the Stamm AG company. "Thanks to the meticulous planning and prefabricated components, we set up the building with 15 apartments ready in just three weeks. With construction projects with a lot of steel, brick and concrete, it takes much longer. Often planning and decision-making for these materials on the construction site. The massively disrupts the construction process. With timber buildings, things are different. Technologies like TS3 and construction processes, where the timber construction specifies the accuracy, are worth their weight in gold for us," says Kaiser, Kaiser describes.

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View of the staircase core: In large construction projects, builders often first concrete the staircase core. Carpenters then assemble the prefabricated wooden components around it. Timbatec has reversed this sequence: the wooden structure is erected, then the liquid concrete is poured.

The Timber Structures 3.0 technology, or TS3 for short, is a process that can generate large large areas from wood - without the previously common cross beams. These large areas can replace reinforced concrete in most areas. TS3 connects wood components on the face side. For decades, this was considered impossible. The solution is a two-component polyurethane casting resin. This resin joins the wooden elements to each other on the face side. This enables column-and-slab constructions that were previously only possible with reinforced concrete projects. This means that third generation of timber construction - a quantum leap that is causing the construction industry to rethink.

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The CLT panels are pretreated in the manufacturing plant. A sealing tape (white) is mounted on the (white) is installed on the face side to prevent the casting resin from out of the joint. To ensure optimum grouting, the joint is divided into segments (black bands). segments (black tapes).

The implementation of TS3 technology on the construction site has been continuously optimized, which means that today we are faster and more cost-effective than in the first projects. An important innovation is the V-shaped joint. The joint is hardly visible on the underside of the slab and the consumption of casting resin is significantly lower. An apartment is finished in only one hour. With the current cold temperatures, the resin and the interior are heated.

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