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This paper presents the development, results and conclusions obtained with a solid topologyoptimization code, using truss lattices as an alternative to continuum elements. Truss elements areused for the simplicity of the implementation in a new code, in all aspects: boundary conditions,loadings, elemental stiffness matrix. Blocked structures, well posed mechanical equilibrium problemsare assured by a proper truss arrangement, lattice driven, similar to structured or unstructuredmeshing.