It was brought to my attention that in 1997, Thomas Heatherwick designed a project for King Cross (London) that would have probably been the first fully glass bridge working exclusively in compression. This nice piece of engineering is interesting in the mechanical system it implies on the two banks (800 tons of pressure on each side). The pressure would have been so important than there was no need for mechanical fixing between the 1334 glass sheets of 12mm thick composing the bridge !I have no idea if somebody is still working on this idea currently (the renderings are certainly not from 1997 !) but it seemed interesting enough to be spoken of.
Thanks Bradley.
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