All signs green for new police and justice building

fischer undercut anchors secure PJZ Zurich

All signs green for new police and justice building
References
When the former 63,608 square meter goods station area in the Zurich district of Aussersihl-Hard was to be redeveloped, those responsible thought big: The Construction Directorate of the Canton of Zurich planned the Police and Justice Center Zurich (PJZ) as a center of expertise for combating crime on an area of 35,558 square meters. The new building brings together departments of the cantonal police, the public prosecutor's office, and the penal system, as well as the forensic institute, the Zurich police academy, and parts of the coercive measures court. Upon completion, the PJZ will have around 2030 workplaces. In addition, there will be around 280 prison places for pre-trial detainees and remand prisoners. The PJZ enables the consolidation of the cantonal police, currently spread across more than 30 locations, with the law enforcement authorities and the police and justice prison.
Image: Construction Directorate Canton of Zurich, Photographer: Till Forrer

Object Fact Sheet

Architect
Theo Hotz Partner Architects
Jobs
2030, plus 280 prison places
Total Area
35,558 sq m
Facade material
green shimmering natural stone "Verde Salvan"
A distinctive feature of the building complex, designed by the Zurich office Theo Hotz Partner Architects, is the facade made of glass and green shimmering natural stone. This is Verde Salvan (also known as Vert de Salvan), which is quarried in the Wallis town of Salvan. The installation of the stone slabs on the concrete structure posed great challenges for all planners and executors. The engineering office IBT was involved. The company Marvit was responsible for the substructure and the construction of the facade. The planning was in the hands of Atelier P3 AG. The 3D natural stone slabs were up to 40 millimeters thick. Accordingly, the load level for the anchors was high. "A challenge with the facade of the PJZ was the diagonally running joints," says Uwe Kirchesch from IBT Engineering Office, who in his life has statically designed over 1,000,000 m² of facade surface area. "According to regulations, no dowel anchors may be used here. The joint would first need to be straightened. That is why I very much like to resort to the FZP II undercut anchor from fischer here. Thus, I was able to ensure a compliant and at the same time visually appealing execution."
Image: Building Department Canton Zurich, Photographer: Till Forrer
„We have conducted numerous pull-out tests. As a result, our undercut anchors FZP II 13x15 M8/23 Carbon were perfectly suitable for transferring the high loads,“ confirms Steven-Henrik Maier, Market Manager fischer Facade Systems. „In the technical support we provided for the project, the good cooperation between the IBT engineering office and our business unit fischer Facade Systems proved successful.“ The Zykon plate anchors FZP II ensure a positively locking and completely expansion-free fastening in the conically undercut drilled hole. Their rear mounting enables fastening at the fifth-point of the facade panel. This technique achieves particularly low panel bending moments and high load capacities. And if the need arises, thanks to the FZP II, individual panels on the facade can also be replaced.
Image: General partner & Architect: Theo Hotz Partner Architekten, Zurich - Visualization: Raumgleiter, Zurich
“From an aesthetic point of view, it was also advantageous in the project that our anchors enable the invisible fastening of the panels,” says Steven-Henrik Maier. “The undercut anchors are not visible from the facade view side, even in the joint pattern. This ensures a harmonious building appearance.” Architect Stefan Adler from the office Theo Hotz Partner Architects highlights the effect of the facade made of glass and green-gray natural stone. “‘Verde Salvan’ is a so-called conglomerate rock, which stands out as a real ‘natural’ stone due to its lively structure with various stone inclusions and its color nuances,” says the planner. “At the same time, ‘Verde Salvan’ has enormous strength, which is a prerequisite for implementing the three-dimensional, sharp-edged geometry of the PJZ facade. And as a timeless and robust material, the stone also conveys the dignity of a ‘government building,’ not least.” In 2022, the officials are expected to move into the new quarter. 
Image: Building Directorate Canton of Zurich, Photographer: Till Forrer
From an aesthetic point of view, it was also advantageous for the project that our anchors allow for invisible fastening of the panels. The undercut anchors are not visible in the joint pattern from the facade viewing side itself. This ensures a harmonious building appearance.
Steven-Henrik Maier, Market Manager fischer Facade Systems

The clever undercutting technique behind the green shimmering facade gives the office building a dignified appearance for a long time and combines security and functionality with a modern look.

Further information at: www.pjz.ch

Image: Building Directorate Canton Zurich, Photographer: Till Forrer

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