Fischer push-fit connectors introduce loads into the old structure

“Fischer’s fastening systems were used in almost all of the company group’s trades during the renovation work,” reports Thomas Held, who supported the project as a field service technician. “For the first time, our new FCC push-fit connectors were used for the installation of the new penthouse apartments.” Fischer provided a suitable system with the FCC push-fit connector for a friction-locking connection of the old concrete support layer of the flat roof with the new in-situ concrete supplement. “The FCC anchor was glued in with the FIS EM injection mortar and the load was thus introduced into the old supporting structure,” emphasises Thomas Held. The connection of the in-situ concrete layer took place during embedding and was dimensioned according to head bolt theory. This allowed the customer to lay the foundation for the structures of the penthouse apartments. The panels of the rising wooden structure were anchored in the reinforced concrete ceiling with the Fischer FAZ II anchor bolt. The partially renewed balcony structures were anchored using the fischer high bond system, which was the only system capable of introducing the modified loads into the supporting structure.

“A particular highlight in facade insulation was the fastening of the insulation panels with the fischer/Sto Ecotwist, which was able to clearly demonstrate its universal use in this project,” says fischer key account manager Adolf Hoffmann. The innovative insulation anchor was quickly installed by the craftsmen because it is very easy to install. “Due to the widely varying insulation thicknesses, the Ecotwist was the optimal anchor for this construction project,” also confirmed foreman H. Steiger from the rendering company Märte, Sipplingen. The existing concrete substructure with its 20 mm thick old plaster layer, 60 mm to 240 mm thick PS insulation boards, Sto Top 32, was used for the residential buildings in Singen. The panels with a thickness from 100 mm were anchored with Ecotwist 10-30.

Winner of the German Construction Award 2015/2016

The developer had put out an architectural competition for the renovation measures on Überlinger Straße, which the architectural firm Hermann and Bosch from Stuttgart had won. The bathrooms, facades, windows, balconies, flat roofs and outdoor facilities were modernised. The improvement of the living environment, the elderly-friendly adaptation including barrier-free house access, modernised lifts and modified balconies contribute significantly to improving the quality of the neighbourhood.

“Despite the uniform structure of the overall ensemble, each building has its own identity thanks to the differently coloured ribbons,” says the jury of the German Building Award 2015/2016. Building development has been reorganised to be barrier-free. The new threshold-free entrances to the entrance foyers are accessed via external ramps, stairs and automatic sliding doors. "Savings in construction costs and shorter construction times were made possible by using prefabricated modules for roof renovation and upgrading, as well as by reusing the old waste disposal shafts for vertical reorganisation of the risers.

Thanks to sensitive tenant support, the conversion was successful in the occupied state. The jury agreed that the interplay of these many measures ensured the future viability of the residential complex," the jury concludes.