ClientMunicipality of Rptterdam
ArchitectZwarts & Jansma
Project size25.000 m2 GFA
Start of project2009
Consulting servicesStructural design, specifications, detail drawings and calculations
The obvious approach was to take of the excising roof and to install a new roof. But, then the central zone would be exposed to weather conditions and it would be impossible to work there. In this way the planning would not be feasible. Aronsohn introduced an approach in which the new roof with trusses of 90 m length was constructed above the old one. After this the old roof could be demolished from inside. In this way the building remained watertight all the time. It introduced several critical building phases that had to be checked. In the end it was a very successful approach.