ETH RAPLAB 2019 spring semester's seminar week, together with our participating students, we have built a concrete shell on the ETH Hönggerberg Campus.

I was part of the RAPLAB lecturing team and also worked on the 3D scanning of the shell and made the filming/editing for documentation.

In our workshop we made plaster prototypes inspired by Heinz Isler's process of making shell structures.

I 3D scanned a plaster shell to prepare a digital 3D model in Rhino3D. The 3D model then served as measuring and planning reference.

Starting with a steel bar construction we then applied meshes to tighten them over the base structure.

Then we pushed concrete into the mesh structure starting on the three bases, working our way up.


Type:            Hanging form / Pneumatic form
Material:      Reinforced concrete (Sika MonoTop)
Long sides: 8m
Short side:  7m
Height:        3m
Thickness:  4-12cm
Weight:        Approx. 4 Tons