Optimization of a lattice for 3D-Printing – September 2015

This space truss prototype is one of XtreeE’s earliest projects. It allowed XtreeE to demonstrate his design capacities as well as the potential of its fabrication methods. Since its fabrication, the space truss prototype has been exhibited many times, including at the Synthetic exhibition 2015 in Le Mans and in several shows (more information on the News page).


During the design stage, XtreeE’s team chose to use a genetic algorithm to generate the space truss’ shape. By manipulating potential solutions, comparing and combining them, a genetic algorithm produces over time more and more suitable solutions to the problem posed. The genetic algorithm created by XtreeE’s team for the space truss project aims to reduce the number of bars and therefore the amount of matter in the truss, while resisting to the load cases imposed on the structure.


To fabricate the complex geometry obtained through the genetic algorithm, XtreeE’s team used its clay 3D-printing technique to print a mold, in which ultra-high performance concrete was poured. Once the concrete had set, the clay was washed away in order to remove the truss. XtreeE’s team finally smoothed the truss, initally ribbed due to the mold’s ridges.

Pictures: XtreeE / Nikolaz Lecoq