This document provides specifications for reinforced concrete and masonry construction. It specifies concrete strengths, cement types, steel reinforcement sizes and spacings. Concrete strengths for foundations are higher than for slabs and walls. Reinforcement is specified with diameter, quantity and cover distances. Formwork must resist concrete pressures and maintain tolerances. Curing methods like wet burlap are described to prevent cracking. Seismic parameters, structural systems and maximum displacements are also specified, complying with Peruvian codes.