Project text The Tipperne bird sanctuary in western Jutland is an important stop for migratory birds, home to the oldest ongoing bird count in Europe. The tower is conceived as a volatile yet elemental structure in symbiosis with the vast, flat surroundings, the ornithologists’ and the public’s needs. By collaborating with a local manufacturer of pylons in solid cylindrical iron bars, we reappropriate an existing manufacturing method, to create a permeable steel structure, enabling the horizon and the moist air to flow uninterrupted through and around the tower.
To achieve a minimal footprint, the tower is constructed in gradually expanding segments in an airy steel construction. The triangular segments results in a clearly defined geometrical figure in contrast to the surrounding nature, and minimise the number of corners, providing maximum outlook and volume in the topmost segment for bird watchers to execute their work and the public to experience the landscape panorama through the sliding doors. The steel is galvanised to minimise maintenance, and achieve a materiality that blends with the sky, softly breaking the light in its cylindrical surfaces.
The tower’s segmentation is a consequence of the galvanization kettle’s dimensions. All horizontal elements are constructed in flat iron plates. They are placed in top and bottom of each segment and enables placement of steel slabs and landings, and the volume’s jettying. Vertical, cylindrical iron bars span between the flat iron plates, defining the tower’s boundaries and taking compression forces. Thinner, diagonal iron bars transfer tensile forces and acts as the stairs’ handrails. The stairs transfer forces between the inner and outer construction. Thus, all building elements plays a part in the overall structural function, they can not be categorized into main structure and cladding. All parts constitute a joint whole where space and construction, detail and building, are one and the same.
Project information Location: Tipperne, Ringkøbing Fjord Client: The Danish Nature Agency Financially supported by: Realdania - Stedet Tæller Year of construction: 2017
Architects: Johansen Skovsted Arkitekter Collaborators: Søren Johansen, Sebastian Skovsted
Site analysis and programme with: Christoffer Thorborg In collaboration with: Bertelsen & Scheving Arkitekter ApS Engineer: NordBase Engineering ApS Engineer foundation: Ingeniørgruppen Vestjylland ApS Contractor: Carl C A/S