fischer undercut anchors secure building facade in Europaallee

Secure hold for new Zurich hub of life

fischer undercut anchors secure building facade in Europaallee
The total area of Europaallee is approximately 78,000 m². The Swiss Federal Railways (SBB) as owner and developer are building around 400 new apartments on the site. With Zurich main station within walking distance and opportunities to work, shop, and dine nearby, the district represents the new center of life for many people.

The so-called “Construction Site F” covers a total of about 39,000 m². On 28,000 m² of this, according to the plans of the Zurich office Boltshauser Architekten, a building for 168 rental apartments (16,300 m² of living space) is being constructed. Additionally, offices (7,500 m²), shops and services (800 m²), gastronomy (500 m²), and much more will find space there. Construction work began in 2016 and is scheduled to be completed in 2019. Great importance is attached to the new facade made of glass and natural stone. The combination of modern transparency with high-quality Sellenberg shell limestone and red Main sandstone gives the building—and thus the entire residential district—a friendly face and a representative appearance. Beyond aesthetics, the reliability of the building envelope plays the most important role. Because when facades fail, they endanger public safety as well as life and limb. Therefore, the correct choice and application of anchors are very important.

When anchoring the natural stone elements, the company Zeidler & Wimmel from Kirchheim/Unterfranken, which was commissioned for this, worked closely with the ACT facade specialists of the Fischer Group. This collaboration resulted in the use of around 55,000 Fischer FZP undercut anchors. This facade fastening offers higher holding forces and is suitable for lower plate bending moments than conventional systems, and is installed invisibly from the outside, form-fitting, and completely free of expansion pressure in the undercut drilled hole of the natural stone.  
Until the ideal solution was found, however, some preliminary work and tests with the Sellenberg shell limestone and the red Main sandstone were necessary. The FZP undercut anchors were tested with both materials. For this purpose, the fischer experts, in cooperation with the engineering office IBT, defined a special test program to represent the installation situation on site as realistically as possible.

Due to the porous stone material, a second series of tests with a greater embedment depth was required to meet the demands of wind and dead loads. For this purpose, the fischer project engineers and the engineering office IBT pooled their expertise. Since two stones with different properties are used, these were considered separately and the fastenings were independently optimized according to the respective technical characteristics.
 
The plates used are 40 mm thick with a size of 1,400 by 900 mm. The fischer FZP undercut anchors were the ideal solution for mounting these formats. A comparative consideration of the otherwise frequently used dowel fastening in facade construction (a dowel with a mortar anchor) showed that the minimum plate thickness of 40 mm could not have been maintained in many areas. This would have made the already fully planned substructure unfeasible. The Sellenberg shell limestone and the red Main sandstone are assembled into facade elements with the fischer anchors and then mounted on the buildings.

The result is a facade that combines functionality and safety with an attractive look and can thus shape the new Europaallee district for years to come.

Property Profile

Number of products used:
55,000 units
Contracting Company:
Zeidler & Wimmel from Kirchheim/Lower Franconia
Planning Office:
Boltshauser Architects, Zurich
Client:
Swiss Federal Railways (SBB)
Overall project scope:
The area of Europaallee measures approximately 78,000 m² in total. The Swiss Federal Railways (SBB), as owner and developer, are building around 400 new apartments on the site
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