The Hellwies school complex in Volketswil is to be renovated and expanded to create space for 18 additional classrooms and a new gymnasium. The project will involve increasing the number of floors in the existing buildings. Its vertical consolidation concept is characterised by an economical use of land resources, minimal consumption of grey energy and the creation of focal centres.
The existing Hellwies school complex consists of three blocks. Built in 1968/69, the two Blocks A and C will be upgraded and a floor will be added. Block A in the existing buildings has three floors. The supporting structure consists of reinforced concrete and masonry. Block C of the existing buildings has one to two floors and is constructed in part from bricks and steel. The two buildings are founded on Franki piles. One floor will be added to both buildings using a lightweight construction method over the entire base area. The roof of the extra floor is made of wooden beams. In Block A, these span a learning-scape of more than 24 m without columns. In Block C, they span a new gymnasium with dressing rooms along the sides. The floors of the storeys added are composed of a beam grid made of a reinforced concrete composite structure, which distributes the loads specifically to the strongest vertical load-bearing elements of the existing building. In Block C, particular consideration has to be given to the strong dynamic effects from gymnasium activities on the wide-span grid with its lightweight construction. The existing building will be supplemented or reinforced where necessary so as to allow the new loads to be transferred to the ground.
2018 bis 2020
weberbrunner architekten ag, Zürich
FUNCTION WITHIN PROJECT
Analysis of current condition as well as structural and fire protection planning from the competition phase to implementation