Abstract: The invention is directed to a prefabricated stair formwork structure (1) for making a stair flight, comprising: a first space (A) for containing a concrete cast defined by two longitudinal beam elements (11, 12), arranged parallel to one another, and two transversal beam elements (13,14), also arranged parallel to one another and each coupled with both said longitudinal beam elements (11, 12) at their respective ends; a plurality of shaped elements (15) each defining a second containment space (S) for a concrete cast of corresponding steps, said shaped elements (15) being fixed in succession above said at least two longitudinal beam elements (11, 12); an element (16) for closing the bottom of the formwork structure (1), fixed to said longitudinal and/or transversal beam elements on the opposite side with respect to said shaped elements (15); and a reinforcement structure (C) of the concrete housed in said first containment space (A).

Abstract: A floor structure (1) of the type having “crossed reinforcement rods” is described comprising: a) a plurality of composite construction elements (2) arranged side by side and comprising: a1) an elongated body (3) made of expanded plastic material provided with an upper face (3a); a2) at least one reinforcing section bar (4) longitudinally extending in the elongated body (3) and having an upper portion (4c) protruding from the upper face (3a) of the body (3); b) a substantially reticular reinforcement metal structure (10) of a concrete casting (9), supported by the upper portion (4c) of the aforementioned at least one reinforcing section bar (4) at a predetermined distance from the upper face (3a) of the elongated body (3) made of expanded plastic material. Advantageously, the floor structure (1) exhibits lightness and self-supporting characteristics and allows to achieve a substantial reduction of the labor and costs for its manufacture.

Abstract: A composite for constructing concrete floors is completely factory assembled and comprises a body of expanded plastic having at least two parallel channels, open on the upper surface of the panel, extending the length of the article, adapted to be filled with concrete. A steel reinforcement bar fabric is installed into each channel, which may comprise at least two parallel steel bars connected by cross bars. At least some cross bars extend beyond a lowest reinforcement fabric bar to provide spikes long enough to pass through the plastic bottom and protrude therefrom.

Abstract: A self-supporting construction element (1) is described, comprising: a) an elongated body (2) made of expanded plastic material; substantially parallelepipedic and provided with respectively lower (8) and upper (9) opposite faces; b) at least one reinforcing section bar (12, 13) transversely extending in the body (2) between the faces (8, 9); wherein the elongated body (2) made of expanded plastic material is provided with at least one recess (14, 27) open at an upper side for housing a concrete casting (15) and wherein the reinforcing section bar (12, 13) extends at least in part in the aforementioned at least one recess (14, 27). Advantageously, the construction element (1) exhibits both optimum self-supporting characteristics and a good fire resistance in case of fire.

Abstract: A composite construction element (2) particularly useful for manufacturing building floors, comprises: a) an elongated body (3) made of expanded plastic material, provided with at least one longitudinal channel (4) open on the upper side for receiving a concrete casting (5); b) a reinforcement metal structure (11) of the casting (5), housed in the longitudinal channel (4), associated to the elongated body (3) and having opposite free ends (12) protruding from longitudinally opposite parts of the elongated body (3) for a portion of predetermined length. Advantageously, the composite construction element (2) possesses optimum load bearing characteristics, lightness and flexibility of use.

Abstract: A composite for constructing concrete floors is completely factory assembled and comprises a body of expanded plastic having at least two parallel channels, open on the upper surface of the panel, extending the length of the article, adapted to be filled with concrete. A steel reinforcement bar fabric is installed into each channel, which may comprise at least two parallel steel bars connected by cross bars. At least some cross bars extend beyond a lowest reinforcement fabric bar to provide spikes long enough to pass through the plastic bottom and protrude therefrom.

Abstract: A self-supporting construction element (1, 101) of expanded plastics, in particular for manufacturing floor elements and walls of buildings in general comprises: (1) a central body (2), substantially parallelepipedic in shape and having two opposite faces (6, 7); at least one reinforcing section bar (8,9) transversally extending across the central body (2) between the faces (6,7) thereof and embedded in the expanded plastics; a lath (16) for supporting at least one layer (17) of a suitable covering material, associated to a fin (11,12) of the reinforcing section bar (8,9) lying flush with and substantially parallel to at least one of the faces (6,7) of the construction element (1,101).

Abstract: An apparatus for molding a continuous foamed plastics element (2), such as a floor construction member of the type comprising a substantially parallelepipedic central body (3) and at least one lateral projection (5,6), includes a mold (13) comprising a forming chamber (13a) and a stabilization chamber (13b) defined between a bottom wall (22), a pair of opposite side walls (20,21), and a cover (23). Advantageously, the cover (23) and/or one or both the side walls (20,21) of the mold (13) comprise a plurality of structurally independent segments which may be adjustably positioned toward and away from the bottom wall (22) of the mold (13) for independently adjusting, in a substantially continuous manner, the height of the molding seats of the central body (3) and/or of the lateral projection (5,6) of the continuous element (2) in each of the forming (13a) and stabilization (13b) chambers of the mold (13).

Abstract: A sectional nog structure for fastening a covering element to a foamed plastic slab (5, 6, 35, 39, 49, 54) comprises at least one insert (2, 3), flush-insertable in the slab (5, 6, 35, 39, 49, 54) and associated with a tierod (4), having a base (10) accessible from the outside of the slab and constituting respective means for fastening to the slab (5, 6, 35, 39, 49, 54) the chosen covering element. Advantageously, this sectional nog structure allows to manufacture composite and modular construction elements, such as for example lost formworks and panels incorporating at least one foamed plastic slab and being able to support any covering element.

Abstract: An apparatus for molding a continuous foamed plastic element, such as a floor element having a substantially parallelepipedic central body and at least one side lug, includes a mold in which respective molding cavities of the central body and of the side lug are defined between a bottom wall, a pair of opposite side walls and a cover. A mechanism adjustably positions at least one of the cover and one or both of the side walls of the mold, away from and towards the bottom wall, to regulate, in an adjustable and substantially continuous manner, the height of the molding cavities for at least one of the central body and the at least one side lug of the continuous element.

Abstract: A composite panel (1) particularly suited for erecting buildings with a structural load-bearing wooden framework (4) is formed by a substantially parallelepiped body of expanded synthetic material having a standardized thickness, a modularly standardized width and a customized height, which is congruent with the design floor height of the building to be constructed. The panels have a plurality of longitudinal channels extending for the whole height of the panel. A series of channels (2,3) uniformly spaced and staggered in the sense of said width and of said thickness of the panel, are open on the adjacent face of the panel and have a T-shaped cross section. In these open channels fit T-shaped cross section wooden posts (4), the stem portion (4b) of which emerges out of said open channels and project from the surface of the panel.

Abstract: A self-supporting construction element (1, 101) of expanded plastics, in particular for manufacturing floor elements and walls of buildings in general comprises: (1) a central body (2), substantially parallelepipedic in shape and having two opposite faces (6, 7); at least one reinforcing section bar (8,9) transversally extending across the central body (2) between the faces (6,7) thereof and embedded in the expanded plastics; a lath (16) for supporting at least one layer (17) of a suitable covering material, associated to a fin (11,12) of the reinforcing section bar (8,9) lying flush with and substantially parallel to at least one of the faces (6,7) of the construction element (1,101).