Читать книгу Rethinking Prototyping - Группа авторов - Страница 96

The trade fair company Messe Frankfurt announced in 2008 an architectural competition for the new design of the entrance gates for the exhibition grounds. In the competition the design for two entrances, the north and the south gate, was asked. For each of the entrance gates a canopy with a signalling effect sheltering the service personal and a guardhouse had to be designed. The roof structure consists of crossing flat steel lamellas in an irregular arrangement with a wooden plate on the top. The load bearing girder grid is supported by triangular columns chamfered towards the top. While the southern gate is located on the ground, the northern gate is structurally constrained due to its position on a bridge. The competition-winning proposal designed by Ingo Schrader in close collaboration with Bollinger + Grohmann Ingenieure forms the northern entrance gate for the premises of the trade fair in Frankfurt. The oval shape of the roof - with a size of 20 by 40m - guarantees shelter for rain for the staff at the entrance gate.

To minimize the overall surface of the roof and the overlapping with the public road, which runs parallel to the trade fair entrance lane, the architect Ingo Schrader decided on an oval shape for the roof instead of a circle, which was originally envisaged (Fig. 4). The bottom surface of the roof is the most exposed part since the gate is approached from below via a sloping ramp (Fig. 3). Particular attention was therefore put into the design of ceiling, which became a structural ornament.

Fig. 2 Lamella Configurations for different roof geometries North- South - West Canopy. Whereas the south gate was postponed the north gate canopy with an oval shape and a span of 20 by 40 m supported by 4 columns will be constructed in the summer of 2013.