The invention corresponds to a metallic profile (1), or of another suitable material, with appropriate structural characteristics for the construction, and to a structural slab (6) that uses these profiles, which is able to satisfy the structural requirements exceptionally well and with aislación, a real estate project, and requires of a smaller significant quantity of elements of levered up during its construction, involving low costs of acquisition of parts, transfer and installation in work. The section of this profile (1) is hollow and abierta in his part superior and its contour he is similar to the one of a “inverted T”. This structural slab (6) is constructed with a horizontal adjustment of these profiles (1), a plurality of located blocks of insulating material (7) between the same, it enmeshes metallic (8), or of another material adapted, located on the same and a piece of concrete (9) that unites the other parts of the structural slab (6) allowing which they work like a compound system.