Figure 3

Mesh design. Top: In order to achieve a mesh which follows the architects’ design one can employ an iterative procedure which consists of a subdivision process [6], a switch to diagonals, and mesh optimization such that the resulting mesh can be equipped with beams without node torsion (image courtesy Evolute GmbH). Bottom: final mesh corresponding to Figure 4 (image courtesy Waagner-Biro Stahlbau, cf. [7]).