This work presents a comprehensive bibliographic review of lattice structures by additive manufacturing, regarding their categorization, design parameters, their mechanical properties and applications within the current market. From such a review, a substantial lack of an easily applicable design methodology, for applying lattice structures to additively manufactured structural components, emerged. The goal was then set to study a design method where lattices, acting as a lightweight reinforcing structure, could be applied with the best performance to weight ratio. A simple test specimen where a lattice reinforcement could be applied was defined, and the lattice was set to live within a design space, where the geometrical properties of the lattice, the presence of skins and the geometric configuration of the reinforcing structure could change.