The Livia-Castelo precast slab provides an optimised solution for the construction of flat slabs. The up-to-date design of the elements delivers solutions for residential or industrial construction. The Livia-Castelo slab is a precast/prestressed element that has a flat interior side, ready to be coated after its joints are sealed. The advantages of the element lie in its formwork function during the construction of the slab. The precast concrete parts support the poured concrete. Two lateral ribs and a central rib extend from the inferior side of the precast slab. The central rib features steel reinforcement in the form of a truss.