The study of this work presents a partial structural analysis of the chassis of a mobile concrete plant with erectable silo, designed and produced in a company of the metalmechanical industry. The main objective of the author was to perform a partial analysis of the chassis structure that supports the cement silo, due to a deformation presented in the beams where the hydraulic cylinders are fixed, and thus to design a chassis with truss to support the maximum stresses presented in the concrete plant. To certify that the place of the deformation is, in fact, the region of greater concentration of stress, a Von Mises stress analysis was performed through SolidWorks - Simulation on the original structure. A chassis with plane truss was modelled to replace the original deformed structure. To design this new truss chassis, MDSolid 4.0 was used, which was used to calculate the stresses in the truss members, and through these stresses the truss was designed and another structural analysis was performed using SolidWorks - Simulation.