Frei Otto, Günther Behnisch. Olympic Stadium. Munich

December 17, 2009

Frei Otto, Günther Behnisch. Olympic Stadium. Munich

In a conversation which took place with Juan María Songel (GG Barcelona, 2008 p 91) Frei Otto regrets that the Olympic stadium roof could not be lighter, owing to the necessity to adapt it to a form previously designed by the winner of the competition, the architect Günter Benisch.

The engineer's desire was to achieve minimum impact on the park, like a veil laid over the hill. For the first time in his experimentation with cable mesh nets, the form was not generated by natural physical processes, but by a preconceived design.

Photos taken by a+t.

Frei Otto, Günther Benisch
Olympic Stadium
Olympiapark
Munich  1972



The roof is suspended from 12 articulated steel masts of varying heights


The roof has a surface area of 74,800m2


A network of rectangular mesh pre-stressed cables, spaced at 75cm in both directions and with a varying intersection angle enabling them to be accommodated to the curvatures of the roof








The roof covering consists of a 2.9 x 29 m, 4 mm thick sheet of PVC-coated polyester fabric. To avoid deformation caused by temperature change, it rests on neoprene pedestals


Given the lack of previous experience working with these dimensions, the authors made an initial 1:125 scale model. Later workshop drawings were made of the whole roofing surface on 1:10, thanks to a computer program developed for the occasion


The original capacity was for 80,0000 spectators, later reduced to 69,000








New seating


Original seating







 


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