1964 Bochum, Ruhr-University
At that time Mr. Battermann - a founder member of Calenberg - developed the Calenberg products Compact Bearing CR 2000 and Perforated™ Bearings. This was brought about by the development of the demanding new building construction with prefabricated sections for the Ruhr University of Bochum, the largest construction site of Europe at that time.
More than 20,000 Calenberg bearings were installed. Still today after 45 years of extreme load conditions the bearings comply completely with all requirements. Standard approvals or guidelines for bearings in building construction did not exist in the sixties of the last century.
For that reason extensive testing and safety verifications were part of the contract with the Ruhr University of Bochum. Well known research scientists like Prof. Fritz Leonhardt, Prof. Dr.-Ing. H. Rainer Sasse, Prof. Dr.-Ing. Karlhans Wesche et al prepared 13 expert opinions in all.
Calenberg Ingenieure GmbHAm Knübel 2-4
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