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Navigation help Label_9E384E34_8E72_0971_41DC_71DD6C21AEE9.text = Quelle: EPFL Label_64125BE4_59C4_640A_41D1_C10B8112A9DB.text = Quelle: EPFL Label_679D779C_59C4_2C3B_41C0_3F924B7D7D57.text = Quelle: EPFL Label_F1ADC9A8_E652_6ED4_41D4_9A696AF36C9F.text = Quelle: EPFL Label_9880329F_8E3B_CDE3_41C6_AC56F54B7003.text = Quelle: EPFL Label_985E077E_8E28_B324_41D6_AC37FE6A1546.text = Quelle: EPFL Label_9948F3EB_8E29_B32C_41DA_33EA569A976F.text = Source: Zooey Braun Label_5BB1B53E_5537_6724_41D3_C5224BFA943C.text = Tour in Deutsch Label_0A52AB67_F8C7_9DEB_41E4_0CFECD92BF0F.text = Virtual NEST Tour ### Multiline Text HTMLText_985C1782_8E28_B3DC_41C9_78A3E33AC831.html =
A digitally designed floating concrete staircase


The concrete staircase called "Cadenza" leads to the second floor of the STEP2 unit. It was designed and realized by experts from ROK Architekten, the Digital Building Technologies chair at ETH Zurich, the former BASF subsidiary Forward AM, the 3D printing company New Digital Craft, the precast concrete parts manufacturer SW Umwelttechnik, the engineering firm WaltGalmarini and the Empa spin-off re-fer.
As with other innovative projects, the team exploited the full potential of computer-aided design and 3D printing. Using 3D-printed formwork, they were able to create more complex shapes than would have been possible with conventional special formwork. As the individual steps are extraordinarily thin and fixed only by threading them onto a curved steel rod, they almost appear to be floating. Additionally, the 3D-printed formwork could be used multiple times, which meant that the staircase, as well as the formwork, required significantly less material.
Cadenza's prefabricated steps, which comprise roughly 40% of the volume of conventional concrete helical stairs, were assembled at Empa in Dübendorf and fixed in place using re-fer's pre-stressing technology. The entire staircase was then lifted into the unit, through an opening in the ceiling. Because the individual concrete steps were threaded together on a steel rod, they can be disassembled relatively easily again and possibly reused in another project. The lightweight helical staircase Cadenza thus demonstrates the capability of the team's developed approach to create individually tailored, resource-saving concrete elements.


Further information
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A multifunctional and resource-optimized floor system


In a joint effort, the architects from ROK, engineering firm WaltGalmarini AG and Stahlton Bauteile AG developed the highly innovative ribbed filigree floor system, which is being used for the first time in the STEP2 unit. It allows for a span width between 8 and 14 meters, making the system ideal for use in office and high-rise construction. Using 3D-printed mineral formwork, which is 100 percent recyclable, Stahlton prefabricated the individual slabs in their factory and transported them to NEST for assembly in the unit.
By combining digital planning and 3D printing, Stahlton was able to reduce the amount of material used as well as the emitted CO₂ by 40 percent compared to conventional flat concrete ceilings. Finally, the slabs contain an acoustic solution, consisting of 3D-printed boxes that were fitted with clay foam from BASF for better sound insulation.


Further information
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Exterior view of the NEST unit STEP2
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Holistic energy concept and adaptive façade


The engineering firm WaltGalmarini has developed a comprehensive energy and comfort concept for STEP2. Its façade is the key element when it comes to optimizing the building's indoor climate and simultaneously increasing its energy efficiency. Hence, it makes use of a new double skin façade developed by Aepli Metallbau with integrated shading and controlled natural ventilation. The façade itself is a test and development platform: with little effort, it is possible to replace individual modules in the coming years, thus, allowing to install and test new technologies. In the first phase, for instance, a window element from New Digital Craft with an integrated, 3D-printed structure is used to provide shading adapted to the sun's path.
Another focus lies on STEP2's energy production. The façade should have a positive effect on the building's energy balance. To this end, the team combined various technologies and installation positions for photovoltaics in the façade, in order to test their efficiency and cost-effectiveness. The ongoing operation of the unit also allows to take into account the effective user behavior and, thus, provides valuable data.


Further information
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Beyond Zero: Buildings as carbon sinks


The Beyond Zero unit promotes promising CO₂-reduced and CO₂-negative innovations in the building sector and shows whether and how buildings can act as carbon sinks. The unit uses innovative building materials developed at Empa, such as concrete or insulation materials, which can bind carbon. The project also analyzes the global feasibility of such technologies and shows how the transformation of the construction industry could be achieved. Beyond Zero is currently in the planning phase.


Website Beyond Zero
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Developing market-ready solutions through co-creation


Construction usually works in a serial manner: every involved partner completes their work at a certain point in the overall timeline and then hands over the site to the next party. When it comes to innovation, though, this approach does not lead to satisfactory results. For the quality of realized solutions, it is imperative that all involved parties work together along the value chain from the beginning, thus contributing to a common goal with their individual and valuable expertise. The two-story unit STEP2 demonstrates in an impressive manner, what is possible by applying this cooperative approach. Involving every partner, the project team carefully evaluated and defined a business case for each innovation ahead of construction, because the ambition was to realize only what has real market potential in the construction industry. Therefore, over a period of three years, partners from the industry and from research have developed innovations in the field of circular economy, industrial and digital fabrication, as well as building envelope and energy systems that fulfill this claim.


Usage: two-story innovation workshop and office space


Opening: August 2024


Partners: Empa, BASF, ROK Architekten, Digital Building Technologies – ETH Zürich, Aepli Metallbau, Stahlton Bauteile, SW Umwelttechnik, WaltGalmarini, Bartenbach, Forward AM Technologies, Hilti, New Digital Craft, re-fer


Website STEP2
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DroneHub: An aviary for drone research


The DroneHub at NEST will be a test environment that facilitates the integration and interaction of robots such as drones or climbing robots with infrastructure systems. Leveraging the ability of robots to act autonomously, the DroneHub serves as test-bed to perform challenging tasks and thus lowering both the risks for humans and the cost of operation. This includes inspection of fasçade elements, repairs of cracks or surface cleaning in areas, which are dangerous for humans to work at.
The DroneHub is being developed by the Empa Laboratory of Sustainability Robotics in collaboration with Imperial College London. It is currently in the planning phase.


Website DroneHub
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move: Mobility of the future


The next few decades will be a major challenge for the mobility sector. Today, road traffic depends almost entirely on fossil energy. By 2050, it should be powered solely by renewable energy.
move is Empa's future mobility demonstrator. Together with partners from research, industry and the public sector, concepts for mobility without fossil fuels are implemented and operated at move. move complements the research performed in Empa's laboratories. The focus lies on electric and hydrogen mobility as well as on vehicles powered by synthetic fuels.


Website move
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