Method and device for strengthening and lightening floor and roof framing

Method and device for strengthening and lightning floor and roof framing, wherein the method mainly uses some devices, prefabricated beams, moulds or blocks, mesh (electro-welded or the like), concrete laid on site, and if necessary, reinforcing rods. The process is essentially characterized by preferably starting transversally installing a device in the beam, which consists of a profile, a pin and two screws. The profile is made from a tensile-strength resistant material, folded preferably into a “U” shape, the lower section of the “U” shaped profile has in its inner wall the shape and dimensions of the base and of its adjacent sides of the beam cross-section, when the profile sides reach the level where the beam cross-section has its higher width, said sides are perpendicularly extended to its base plane, until reaching a height over said plane equal to the distance of the determined plane in order to affix the mesh which will form part of the compression slab, up to the beam base. The profile sides will have in their ends some folds in order to form anchorages. The profile will have several holes and projections. The section is transversally placed on the beam, contacting the profile base with the beam base, and the sides adjacent to the profile base contacting the sides or the edges adjacent to the beam base. The pin consists of an essentially straight rod, which is affixed from one to the other of the profile sides, being able to use said holes in both sides, the pin remaining parallel to the profile base plane and at a distance from this plane, equal to the height of the beam cross-section, such that the pin touching the beam upper section, avoiding the displacement of the section downwards of the beam. The two screws will be symmetrically housed faced to each other, in said holes in both profile sides, located at a height from the profile base plane, equal to the distance from the base of the beam cross-section up to the level wherein said section has its higher width. The screws will have enough length to cover the profile thickness and to have a remaining segment in order to settle the side edges of the moulds. Then, several of these devices will be similarly installed along the beams, spaced to each other according to the requirements of the situation. After, the beams will be settled in their walls or girders, remaining parallel and spaced to each other at a distance according to the dimensions of the moulds or blocks. Subsequently, the moulds will be settled on the protruding segments of the screws, until the spans be covered. If necessary, reinforcing rods will be lengthwise or transversally installed with respect to the beams, the holes and projections of the device can be used as a support. Then, the mesh will be placed by using the device ends as a support. Further, the concrete is poured over the system until filling the channels and the compression slab. After the concrete has properly set, the screws are removed so as to recover the moulds or blocks from below in order to reuse thereof. The device lower section no covered by the concrete remains exposed for the affixation of supports for:

• ducts, ceiling roses, or any other suitable item, without requiring drilling the framing.