WO2009092890A2

WO2009092890A2 - Prefabricated modular dry-floor element, method of producing such a modular element and dry floor comprising a plurality of modular elements

Info

Publication number: WO2009092890A2
Application number: PCT/FR2008/001526
Authority: WO
Inventors: Yves Hamelin; Yves Benkemoun; Jacques Denimal; Claude Gabel; Céline GUERET; André Rivaud; Patrick Truquin; Chantha Moum
Original assignee: Placoplatre; Arcelor Construction France
Priority date: 2007-10-30
Filing date: 2008-10-29
Publication date: 2009-07-30
Also published as: FR2922916A1; WO2009092890A3; FR2922916B1; EP2220304A2

Abstract

A prefabricated modular dry-floor element of the type that comprises a plurality of metal profiles and a plurality of closed ribs, the profiles being designed to rest on a bearing wall or beam and constituting supports on the opposing longitudinal edges of the closed ribs, is characterized in that the modular element (10) comprises a closed rib (20) and at least one profile (30), both being preassembled, the profiles being connected to the closed rib in the vicinity of the two longitudinal edges (23) of the closed rib, and the profile (30, 40) of each modular element working in conjunction with the profile (30, 40) of a juxtaposed modular element to form the dry floor and having at least one right-angled Z section.

Description

Prefabricated dry floor modular element, method of manufacturing such a modular element and dry floor comprising a plurality of modular elements

The present invention relates to the production of floor or other structural element for the building and more particularly a modular element including dry floor and a dry floor comprising a plurality of modular elements juxtaposed.

Traditionally, a floor comprises a plurality of parallel beams horizontal and equidistant on the one hand, and interjoists placed on adjacent beams made of prestressed concrete or bent steel on the other hand. Interjoists are made of material having thermal and acoustic insulation characteristics and typically expanded polystyrene. The interjoists have in the vicinity of their longitudinal edges spoilers that rest on the heels of each of the two adjacent beams. Thus interjoists form bridges or interlayers between the beams and contribute to the realization of a continuous support for the casting of a concrete slab.

When the beams are made of reinforced concrete, high weight, their installation involves the implementation of lifting equipment. In addition, the dry floor resulting from the installation of expanded plastic interjoists on the heels of the beams has a low mechanical resistance determined in particular by spoilers of reduced thickness of interjoists resting on the heels. Such a dry floor has a very low resistance to breakage interjoists and it is the casting of concrete that provides the connection between the beams and interjoists and a substantially flat and continuous surface for subsequent laying of coating. Furthermore, the duration of the setting of drying of a concrete pour on a dry floor of this type is of the order of 3 weeks to 1 month, which delays by the same construction of the building concerned. Also known is the document FR 2 872 187 which describes a formwork system comprising a plurality of parallel and equidistant beams of folded steel, for example made of galvanized sheet, of general section. in omega. These beams are first attached to the wall or support beams and then each interjoists is introduced between pairs of adjacent beams to achieve the dry floor. Then the concrete must be poured over all the beams and interjected to obtain a flat and continuous surface. The mechanical strength of the floor thus obtained is particularly variable at the level of the beams where can occur a strumming effect. In addition to the low flexural strength at the omega beams, such a floor has a low thermal insulation capacity at omega beams since the interior of these beams is an empty cavity.

Also known is the slab element MPH Euromac 2 from the company EUROMAC 2 which is a slab consisting of an expanded polystyrene formwork block comprising a pair of longitudinal sections Z section right embedded in the expanded polystyrene mass and disposed of a symmetrical way inside the formwork blocks. These profiles form reinforcing elements or reinforcing elements. The slab elements are placed on walls and abut against each other at their heels. Beams are arranged in the recess formed between adjacent slab elements and welded mesh laid on all the slab elements before pouring the concrete which provides the connection between the slab elements, the beams and the welded mesh.

Document FR 2 202 212 describes a prefabricated floor element of the vault type or expanded polystyrene slab comprising a wooden beam fastened to a longitudinal edge of the floor element by means of nails. Such prefabricated floor elements are placed on prestressed concrete beams before pouring a concrete screed to secure the prefabricated floor elements to the prestressed concrete beams.

The document FR 2 861 768 describes a structure of slabs able to be placed between two beams of prestressed concrete or wire mesh to ensure the formwork and the insulation of the compression slab in the floor. To avoid damage, the underside of the polystyrene block has a layer or foil metallized very thin.

FR 2 606 323 discloses a flexible reinforcing tape, for example a metal foil or thin plastic material to adhere in a region of interjoists where tearing of the expanded polystyrene is likely to occur under the effect of a bending effort.

Also known is US 4 941 304 which discloses an insulation panel comprising plates and channel profiles made of aluminum sheet whose inner cavities are filled with a compressible insulation material. The longitudinal edges consist of male and female channel sections to ensure the connection between two juxtaposed panels.

The document WO2007 / 095948 describes a wall or partition system of building comprising insulating panels arranged between section sections in C or U. The profiles and panels are assembled to each other on the building. To this end, one of the longitudinal edges of each panel has a slot for receiving one of the wings of the corresponding profile during installation. The profiles may include a tip to penetrate when laying in a longitudinal edge of a panel on the opposite side of the wings of the profile concerned.

Finally, US 5,524,400 discloses a wall assembly comprising a plurality of panels comprising a parallelepiped block of expanded polystyrene and U-shaped vertical sections attached to the opposite vertical edges of the block on the one hand and horizontal profiles also U-shaped attached to upper and lower edges of this plurality of panels, on the other hand, these horizontal sections ensuring the structural integrity of the wall assembly thus produced.

The present invention aims to improve or eliminate the disadvantages of dry floors of the state of the art. According to one aspect of the invention there is provided a prefabricated modular element including dry floor comprising a interjoists and a profile having a straight Z-section secured to one and / or the other of the longitudinal edges of the interjoists.

According to another aspect of the invention, there is provided a dry floor comprising a plurality of such modular elements juxtaposed. The modular element of the present invention has many advantages over sets consisting of joists and interjoists and in particular: ease and speed of mounting a dry floor from the modular elements; better mechanical strength of the modular elements avoiding buckling, and better mechanical strength of the dry floor resulting therefrom; a reduced weight; and the possibility of eliminating the casting of a concrete screed prior to the installation of the floor covering.

According to one aspect of the invention, there is provided a prefabricated modular element including dry floor comprising a plurality of metal profiles and a plurality of interjoists, the profiles being intended to rest on a bearing wall or beam and constituting supports on the opposite longitudinal edges of the interjoists, characterized in that at least one section of each modular element is Z-section right and comprises a preassembled interjoists or the profiles being secured to the interjoists near one or both longitudinal edges of the latter. Such prefabricated modular element including dry floor may further comprise one or more of the following characteristics:

Thus, one of the profiles may have a right Z section and the other section may have a U or C section.

The profile or profiles may be glued to the interjoists, or the profile or profiles may be welded by interstage molding.

The interjoists may be made partially or entirely of a thermal insulating material, and in particular an expanded plastic material such as polystyrene or expanded polyurethane having a density between

10 and 40 kg / m3 or made partially or entirely based on glass fibers or compacted mineral fibers.

The interjoists may have a generally parallelepipedic shape, the right Z-section profiles may be arranged in a symmetrical manner and secured to the opposite longitudinal edges of the interjoists and arranged in a symmetrical manner.

A free edge of a sole of each profiled section Z right may include a return engaged in a slot or notch made on one side of the interjoists.

The section or profiles with a straight Z section may comprise a sole at each end of a core, one of the two longitudinal sides of the interjoists having a shoulder, one of the soles of the corresponding profile covering the lower surface of the shoulder. One of the profiles may be of larger dimensions than the other, so that when two modular elements are disposed edge to edge, the smaller dimension of one of the elements can fit into the larger profile of the other modular element.

The interjoists may have a parallelepipedal general shape and the section secured to one of the longitudinal sides of the interjoists has a U or C section, the legs of the U-section or C covering the edges of the opposite faces of the between you.

The interjoists may have slots or notches capable of receiving returns to the free edges of the U-section or C. The interjoists may have a generally parallelepipedal shape, the outer surface of a sole of the profile (s) being substantially continuity with a corresponding face of the interjoists and at the level of the latter.

The interjoists may have a parallelepipedal general shape, an upper portion has a shoulder to a longitudinal side and a recess to the opposite longitudinal side.

A sole of a right Z-section profile may cover a lower surface of the shoulder and another sole of the profile may cover an edge of the opposite face. The core or the bottom of a section section U or C can cover a part of the corresponding longitudinal side of the interjoists, the legs of the U-shaped or C-section respectively covering an edge of a face of the interjoists and an edge cleared by the depression.

According to another aspect of the invention, there is provided a method of manufacturing a modular element by joining a profile near one or both longitudinal edges of a interjoists.

Similarly, the profile can be secured to one of the two opposite longitudinal sides of the interjoists by gluing, welded by molding, or even by a mechanical fastening means, such as screwing, bolting, riveting or else buttoning. According to another aspect of the invention, there is provided a dry floor comprising a plurality of elements that can be arranged in parallel, Ie or the profiles of each of the modular elements adapted to cooperate with a profile of the modular element juxtaposed.

One of the profiles of each of the modular elements of the dry floor can fit into the profile of a modular element juxtaposed.

The upper surface of the dry floor obtained from the juxtaposed modular elements may be substantially continuous and flat.

The exposed surface of the dry floor can be defined by the upper surface of the interjoists, the interjoists of the juxtaposed modular elements being in edge-to-edge contact.

The exposed surface of the dry floor can be defined by the upper surface of the interjoists and the upper surface of a sole of the profile disposed between the upper face of the interjoists modular elements juxtaposed. The lower surface of the plurality of modular elements may be substantially planar.

The lower face of the dry floor can be defined by the underside of interjoists interjoists being in edge-to-edge contact.

The lower surface of the dry floor can be defined by the underside of the interjoists and the outer surface of a sole of the profile disposed between the underside of the interjoists modular elements juxtaposed. Such a dry floor according to the invention constitutes a monolithic element.

One or more insulating plates may cover the bottom surface of the plurality of modular elements. Embodiments of the modular dry floor element of the present invention will be described by way of example with reference to the accompanying figures:

- Figure 1 is an end view of a modular element according to a first embodiment of the invention; - Figure 2 is an end view of two modular dry floor elements as shown in Figure 1, juxtaposed to form part of a dry floor;

FIG. 3 is a perspective view of the modular element of FIG. 1; FIG. 4 is a perspective view of a variant of the modular dry floor element of the first embodiment;

FIG. 5 is an end view of a modular element according to a second embodiment of the invention;

- Figure 6 is a partial end view of two modular elements of Figure 5 juxtaposed to form part of a dry floor;

FIG. 7 is an end view of a modular element according to a third embodiment of the invention;

- Figure 8 is an end view of two modular elements of Figure 7 juxtaposed to form a part of a dry floor;

FIG. 9 is an end view of a modular element according to a variant of the third embodiment;

- Figure 10 is a perspective view of a plurality of modular elements according to the present invention mounted on a foundation wall to provide a dry floor; - Figure 11 is a perspective view of a plurality of modular elements according to the present invention mounted on the beams attached to the load-bearing wall to form a dry floor;

FIG. 12 is an end view of a modular element according to another variant of the second embodiment;

- Figure 13 is a partial end view of two modular elements of Figure 12 juxtaposed to form a part of a dry floor.

The prefabricated modular element in particular dry floor according to the present invention comprises a interjoists and at least one pre-assembled metal profile, or the metal profiles being secured to the interjoists near one or both sides or longitudinal edges interjoists.

In the first embodiment illustrated in FIGS. 1 to 3, the modular dry floor element 10 comprises an interjoists 20 and metal sections 30, 40, each metal section being secured to the interjoists near one of the two sides. or longitudinal edges 23, 24 of the interjoists.

In practice, the interjoists comprise a block of parallelepipedal general shape, for example 3 to 6 m, or even 8 m long, about 50 to 60 cm wide, and about 15 to 30 cm high, and made of a thermal insulating material, such as an expanded plastic material and especially expanded polystyrene or polyurethane, having a density of between 10 and 40 kg / m ³ . The interjoists can be made of two or more components of insulating materials with different thermal insulation and / or acoustic characteristics, these components being joined together by gluing, welding or a mechanical fixing means.

In this first embodiment of the metal profiles 30, 40 have a straight Z-section and are symmetrically disposed at opposite sides or longitudinal edges 23, 24 of the block of thermal insulating material, and secured to sides or edges. The metal sections 30, 40 having a straight Z section comprise a core 31, 41 and a sole 32, 42 at the upper end of the core and a sole 34, 44 at the lower end of the core; the soles are in practice substantially perpendicular to the core 31, 41 and extend transversely in opposite directions. Preferably a return 33, 35, 43, 45 is disposed at the free end of each of the flanges 32, 34, 42, 44. The return 35, 45 of the lower flanges is housed in a slot or notch 21A, 21 B presented in the lower face 21 of the interjoists 20.

According to this embodiment the inner surface of each lower sole 34, 44 and that of the core 31, 41 respectively wedge the edge or marginal portion of the underside 21 of the interjoists 20 and the longitudinal side or edge 23, 24 20. According to one embodiment, the inner surface of the core 31, 41 is welded or glued by an adhesive adapted to the longitudinal side or edge 23, 24 of the interjoists 20 to ensure the joining of the profiles to the interjoists. Preferably, the core 31, 41 is welded or glued to the longitudinal side or edge 23, 24 over its entire height. The core 31, 41 may be welded or glued continuously along its entire length or in places. The inner surface of the lower flanges 34, 44 may also be secured by welding or gluing to the edge of the underside 21 of the interjoists 20. It may be the same between the upper surface of the sole 42 with the lower face 26 of the shoulder 27 of the interjoists 20.

Other securing means of the profiles 30, 40 to the interjoists 20 are possible and in particular mechanical fastening means such as rivets, staples, screws, bolts, buttons, metal or plastic.

According to another embodiment of the modular dry floor element, the inner surface of the core 31, 41 and that of the lower soleplate 34, 44 constitute removable walls of a mold (not illustrated) in which the interjoists are molded. Permanent walls of the mold form the longitudinal edge 25 of the shoulder, the upper surface 22 of the interjoists, the upper part 23A on the side or longitudinal edge 23 which is above the sole 32, the lower face 21 of the between slots or notches 21 A, 21 B, and finally, if necessary, at least one wall of the latter. In such an embodiment, during the molding of the expanded plastic material, the inner surface of the profiles and more particularly the inner surface of the core 31, 41 is secured by welding to the longitudinal side or edge 23, 24 of the interjoists and possibly the inner surface of the lower flanges 34, 44 or the inner surface of the returns 35, 45 with a corresponding wall of the slot or notch 21 A, 21 B.

Whatever the securing means, it must ensure the immobilization of the profiles and more particularly the souls 31, 41 relative to the interjoists. Thus this fastening prevents the spill of the profiles when a set of modular elements are mounted in dry floor and subjected to the load.

As shown in Figure 10, the profiles of the modular elements and interjois modular elements juxtaposed can be placed and fixed directly on the load-bearing walls, or on the beams attached to the walls, as shown in Figure 11.

Furthermore an opening (not shown) can be practiced in a central portion of such a dry floor to be able to pose a staircase between two levels. To this end, the modular elements of the dry floor on either side of the opening are shortened and interconnected by transverse profiles forming the opposite edges of this opening in the dry floor and ensuring the maintenance of these shortened modular elements and the integrity of the dry floor. In the first embodiment, the metal profiles both have a straight Z-section but one of them and the profile 30 have slightly larger dimensions, in particular the core 31 being higher than the core 41 and the sole 32 wider than the sole 42.

Furthermore, since the profiles 30, 40 are secured to the interjoists, the prefabricated modular elements can be delivered on site ready for mounting in dry floor. Such modular elements have a relatively low weight allowing the installation by two workers without help lifting equipment or other heavy equipment. These modular elements are placed side by side, the sole 32 of the profile 30 bearing on the sole 42 of the profile 40 as shown in Figure 2. Since the profile 30 is slightly larger than the profile 40, the sole lower 42 and its return 43 fit between the core 31 and the return 33 of the profile 30 juxtaposed interjoists. Similarly, longitudinal edge 25 of the shoulder 27 is in abutment with the longitudinal edge 23A of the interjoists 20 of the modular element 10 juxtaposed.

One and / or the other ends of the flanges 33, 43 are preferably fixed by means of bolting or screwing to the load-bearing wall or the support beam on which the modular elements are placed. The soles 33, 43 may be perforated for this purpose. A bore (not shown) may pass through the interjoists shoulder 27 for screwing, bolting or riveting and then filled by a suitably shaped plug of the same material as the interjoists or other filling material, so that to reconstruct the continuity of the upper face 22. The anchoring profiles at one end is advantageous since it allows the expansion of the profiles without producing stresses or deformations of the dry floor. The dry floor, which results from the assembly of the modular elements 10 is a monolithic assembly, which comprises an upper surface defined by the upper face 22 of all the modular elements and is substantially continuous and plane. With such a dry floor we can do without a concrete screed and metal reinforcements without compromising the mechanical strength of the floor. However, a concrete screed, a few centimeters thick (typically 4 to 6 cm), can still be poured on the upper surface of the dry floor. But, advantageously, the flooring is installed without such a screed. For this purpose, suitable gypsum plasterboard such as PLACOSOL ^® gypsum plasterboard from PLACOPLATRE are attached to the interjoists to receive the coating.

To improve the thermal and acoustic insulation of such a dry floor and eliminate the formation of a thermal bridge, a rod or spar (not shown) also made of expanded plastic material including expanded polystyrene or polyurethane rectangular section and dimension corresponding to that of the rectangular cavity defined by webs 31, 41 opposite and the sole 42 is inserted and secured in particular by bonding to the outer surfaces of the profiles forming the cavity. Where the lower surface of the dry floor is no longer accessible after the modular elements have been laid, the chords or side members must be attached to one of the sections before laying modular elements. With the installation of a rod or spar in the cavity formed between two sections, the lower surface of the dry floor is also substantially continuous and flat. Indeed, the outer surface of the flanges of the profiles 34, 44 are substantially at the same level of the lower face 21 of the interjoists 20. As a variant, the edges of the lower face 21 of the interjoists may be slightly set back from the underside of the interjoists between the slots 21A, 21B so that when the profiles are secured to the interjoists, the outer surface of the flanges 34, 44 is substantially in the plane of the central portion of the lower face of the between the slots 21 A, 21 B.

Preferably and as shown in Figure 2, the modular elements 10 are oriented so that the face 22 of the interjoists 20 is the upper face. But it is also possible to assemble modular elements in the opposite direction. Thus with such an orientation, the upper surface is defined by the face 21 of the interjoists 20 and the outer surface of the flanges 34, 44 and the lower surface of the modular element by the single face 22 of the interjoists. The dry floor made from the modular elements thus inverted would have the advantage of facilitating the introduction of rods or spars between the profiles of two modular elements juxtaposed since the introduction of the rod or spar can be made after the installation of the modular elements without access to the lower surface of the dry floor. But such a dry floor will have a lower mechanical strength since the soles 34, 44 do not serve as a support for interjoists and the maintenance of the whole is ensured exclusively by the joining of the profiles at the sides or opposite edges of the interjoists .

In a variant not shown, the shoulder 27 of the interjoists is eliminated, the longitudinal edge 24 extending from the underside to the upper face of the interjoists. In such a case, to ensure the continuity of the upper surface of the modular element, and therefore the dry floor comprising a plurality of assembled modular elements, rods corresponding to the dimensions of the shoulder 27 are inserted and secured in the empty between the interjoists of two modular elements juxtaposed after the laying of the modular elements, especially when the modular elements are oriented as shown in Figure 2.

FIG. 4 illustrates a variant of this first embodiment in which a plate 60, such as a PLACOSOL® plasterboard for laying a floor covering, is fixed on the upper surface of the interjoists 20. Such a plate can be fixed by any means including riveting, stapling, screwing or bolting. Similarly a lower plate 50 may be attached to the underside 21 of the interjoists 20 and / or the outer surface of the flanges of the profiles. A modular element according to this variant of the first embodiment allows an even faster installation since the upper surface is ready to receive the floor covering and the lower surface does not require any other preparation.

In this first embodiment, the upper surface of the modular element and therefore that of the resulting dry floor is formed by the upper face of the interjoists 20. This interjoists thus comprises an upper portion 28 which extends above the level upper flanges 32, 42. This is not necessarily the case. Indeed, in a non-illustrated variant of this first embodiment, the upper portion 28 of the interjoists is removed and the upper surface of the interjoists is substantially at the same level as the outer surface of the upper flanges 32, 42. With such a variant, a plate of expanded plastic material and / or a gypsum board or the like is placed directly on the upper surface of the interjoists 20 and the upper flanges 32, 42 before the laying of a floor covering, or even before the casting of a concrete screed. A second embodiment of the modular dry floor element of the present invention is illustrated in FIGS. 5 and 6. In this second embodiment, the two metal sections, secured to the longitudinal edges of the interjoists, do not have the same section. As illustrated, one of the metal sections 140 of the modular element 110 has the same right Z-section as the section 40 of the first embodiment, while the other section 130 has a section U or C. This other profile 130 comprises a core 131 which extends parallel to the longitudinal edge 123 of the interjoists and is intended to be secured to the latter. It is the same for an upper sole 132 and a lower sole 134 disposed on the same side of the core 131 and respectively having a return 133 and 135 intended to be engaged in a slot or notch 121 B, 122B. The flanges 132, 134 respectively cover edges or corresponding marginal portions of the upper face 122 and the lower face 121 of the interjoists 120.

As in the first embodiment, this other section 130 having a section U or C can be secured to the interjoists by gluing, welding during molding, or even by mechanical fastening means such as screwing, buttoning, stapling, riveting or buttoning. This connection preferably concerns at least the core 131 and the longitudinal edge 124, if any, the flanges 132, 134 and the marginal part of the upper and lower face 122, 121 of the interjoists. Unlike the mounting of a Z-section section straight or U-shaped on the interjoists, the C section section with returns should normally be mounted by relative longitudinal sliding of the profile 130 relative to the marginal portion of the between 120 while the right Z or U profile can be introduced transversely. But the assembly can also be performed by rotating such a profile at the intersection of the return 35 and the sole 34. To do this, the height of the marginal portion of the upper face above the bottom level of the notch or notch 122B may be reduced to facilitate the passage of the return 33 when rotating to the notch or notch 122B.

To allow the interlocking of the section 130 having a section C or U, the sole 132, and in practice the flanges 132, 134, should have a width slightly smaller than that of the upper flange 142 of the section 140.

The assembly of two modular elements 110 is illustrated in FIG. 6. In this second embodiment, when two modular elements 110 are assembled, the contact between them is done essentially via the respective profiles 130, 140. Indeed during the assembly of two modular elements 110 the profile 140 and more particularly the sole 142 and the return 143 engage around the sole 132 and the return 134, the webs 131, 141 and 132,142 soles constituting the main contact areas between the two juxtaposed modular elements 110. The orientation of the modular elements can be reversed. In this case, the sole 132 is supported on the sole 142 from below, and not the other way around.

The variant of the second embodiment illustrated in FIG. 12 is similar to FIG. 5. In this variant, however, the median lower part consists of a material that is distinct from the material of the remainder of the interlock 120, that is, in practice expanded polystyrene or polyurethane, in order to improve the acoustical performance of interjoists. This median lower part forms a 120A panel of a height determined according to the desired acoustic performance, and made of mineral wool, glass wool or rock wool. The panel can be glued or otherwise fixed in the reserve defined for this purpose in the lower middle part of the interjoists 120. The panel could extend over all or part of the length of the interjoists. In this variant, the lower surface 121 of the interjoists is that of the panel 120A and the notches or notches 121A and 122B are cut in the corresponding part of the panel as illustrated. The manufacture, assembly and assembly of such a variant are the same as those of the embodiment of FIGS. 5 and 6.

FIG. 7 represents a third embodiment where the two sections 130, 140 are the same as those of the second embodiment and bear the same reference numerals whereas the interjoists 220 have an upper part 228 above the level of the soles. 132, 142, preferably formed integrally with the remainder of the interjoists 220. This upper portion 228 has a shoulder 227 which extends above the upper flange 142 of the section 140 and a recess or recess 229 above the upper flange 132 of the other section 130 having a U or C section so that the longitudinal edge 223B of the upper portion 228 is recessed with respect to the major part of the longitudinal edge 223 and the lower part of the interjoists 220. The assembly of two modular elements 210 is illustrated in FIG. 8 after engagement and engagement of the profile 140 on the profile 130 as described in connection with the embodiment of FIGS. 5 and 6. On the other hand, the surface The top of the dry floor, made from the modular elements 220 is defined by the upper face 222 which forms the outer surface of the upper portion 228 of the interjoists 220 is substantially flat and continuous.

In such an embodiment, the upper flanges 142 and 132 can be secured to each other by means of screws, bolts or rivets by passing through the shoulder 227. A bore (not shown) which passes up and down the shoulder 227 to allow screwing, bolting or riveting can be filled by a suitably shaped plug of the same material or other filling material to restore the continuity of the upper face 222 of the interjoists. Figure 9 shows a variant of the form of the third embodiment of Figures 7 and 8. In this variant, the lower face of the modular element 210 is packed. For example, a plate 150, in practice a gypsum board such as a plasterboard PLACOSOL ^® , is fixed by gluing or by mechanical fixing means to the interjoists 220 or even to the lower flanges 44, 134. This plate 150 can then be coated with a layer of plaster 155 or other to form a ceiling of the room or room under the dry floor. This lining may be applied at the time of manufacture of the modular elements or during installation and in this case it may extend under a plurality of modular elements. In all of the embodiments described above and illustrated, profiles have a straight Z or U or C section. These profiles include returns to the end of the flanges. It goes without saying that returns are advantageous but are not essential.

In addition profiles having other cross sections can be adopted. For example, profiles having a core and a sole at one end of the core. The soleplate can extend from one side of the core to form an inverted L or L section profile or both sides to form an inverted T or T section profile. The sole may have at its end or ends a return.

Similarly in all the embodiments described, a section is secured to each edge or longitudinal side of the interjoists but it is also possible to provide a section secured to one of the opposite edges or longitudinal interjoists. In such a case, an inverted T-section section could be particularly suitable for constituting supports for the marginal edge of interjoists modular elements juxtaposed. When a profile is secured to a single side or longitudinal edge of a interjoists, the exposed surface of the core and / or the upper surface of the sole may be glued or provided with fixing means to the interjoists of the modular element juxtaposed.

Finally, the application of the modular element according to the present invention is not limited to the dry floor but can also be used for other applications in the construction of buildings. The length and thickness of the modular element will be adapted to such an application and the profiles are fixed at these ends to the supporting beams of the wall.

Of course, other modifications and variants may be adapted to the modular elements including dry floor described in the present application without departing from the scope of the invention defined by the claims. For example, the variant of FIG. 4 or that of FIG. 9 can be adopted in the embodiment of FIG.

Claims

1. Prefabricated modular element including dry floor of the type comprising a plurality of metal profiles and a plurality of interjoists, the profiles being intended to rest on a bearing wall or beam and constituting supports on the opposite longitudinal edges of interjoists, characterized in that the modular element (10; 110; 210) comprises a pre-assembled interjoists (20; 120; 220) and sections (30, 40; 130, 140), the sections being secured to the interjoists at two longitudinal edges (23, 24, 123, 124, 223, 224) of the latter and at least one of the sections having a straight Z-section are near.

2. Modular element according to claim 1, characterized in that one of the profiles (140) has a right Z-section and the other of the profiles (130) has a section U or C.

3. Modular element according to claim 1 or 2, characterized in that the or profiles (30, 40; 130, 140) are glued to the interjoists (20; 120;

220).

4. Modular element according to any one of the preceding claims, characterized in that the or profiles (30, 40; 130, 140) are welded by molding interjoists (20; 120; 220).

5. Modular element according to any one of the preceding claims, characterized in that the interjoists (20; 120; 220) is made of a thermal insulating material.

6. Modular element according to any one of the preceding claims, characterized in that the intervous (20; 120; 220) is made mainly or entirely of an expanded plastic material.

7. Modular element according to any one of claims 5 or 6, characterized in that the insulating material is expanded polystyrene or polyurethane having a density of between 10 and 40 kg / m3.

8. Modular element according to claim 5, characterized in that the thermal insulating material is partially or entirely made of glass fibers or compacted mineral fibers.

9. Modular element according to any one of claims 1, 3 to 8, characterized in that the interjoists (20; 120; 220) has a generally parallelepipedal shape, the sections with straight Z-section (30, 40) being arranged in a symmetrical manner and secured to the opposite longitudinal edges (23, 24; 123, 124; 223, 224) of the interjoists and arranged in a symmetrical manner.

10. Modular element according to any one of claims 1 to 8, characterized in that a free edge of a sole (34, 44; 134, 144) of each profiled section Z right (30, 40; 130, 140 ) has a return (35, 45) engaged in a slot or slot (21A, 21B; 121A, 121B, 122B; 221A, 221B, 222B) made on one side of the interjoists.

Modular element according to claim 10, characterized in that the right Z-section profile or profiles (30, 40; 140) comprise a sole (32, 34, 42, 44; 132, 134; 144) at each end. a soul, one of the two longitudinal sides of the interjoists (20; 120; 220) having a shoulder (27; 227), one of the flanges (42; 142) of the corresponding section (40; 140). covering the lower surface (26; 226) of the shoulder.

12. Modular element according to any one of claims 1 to 11, characterized in that one of the profiles (30; 130) is larger than the other (40; 140), so that when two modular elements are arranged edge to edge, the smaller profile of one of the elements can fit into the larger profile of the other modular element (10; 110; 210).

Modular element according to one of Claims 1 to 11, characterized in that one of the straight Z-section profiles (30) is of larger dimensions than the other straight Z-section profile (40), so that when two modular elements are disposed edge to edge, the right Z-section section of smaller dimensions of one of the elements can fit into the larger profile of the other modular element.

14. Modular element according to one of claims 2 to 7, characterized in that the interjoists (20; 120; 220) has a generally parallelepiped shape and the section (130) secured to one of the longitudinal sides. (124) Pentrevous (120) having a section U or C, the legs of the U-section or C covering the edges of the opposite faces of the interjoists.

15. Modular element according to claim 14, characterized in that the interjoists (120, 220) has slots or notches (121 B, 122B, 221 B, 222B) adapted to receive returns (133, 135) at the free edges. U or C section.

16. Modular element according to any one of the preceding claims, characterized in that the interjoists has a generally parallelepipedal shape, the outer surface of a sole (34, 44; 132, 134, 142, 144) of the or profiles being substantially in continuity with a corresponding face (21; 121, 122; 221) of the interjoists and substantially at the latter.

17. Modular element according to claim 9, characterized in that the interjoists has a parallelepipedal general shape, an upper portion (228) has a shoulder (227) to a longitudinal side and a recess (229) to the opposite longitudinal side.

Modular element according to claim 17, characterized in that a sole (42; 142) of a straight Z-section profile (40; 140) covers a lower surface of the shoulder (26; 226) and a another sole (44; 144) of the profile overlaps an edge of the opposite face (21; 121).

19. Modular element according to one of claims 17 or 18, characterized in that the core or the bottom (131) of a U-section section or C (130) covers a portion of the longitudinal side (223). corresponding to the interjoists, the legs (132, 134) of the section section U or C respectively covering an edge of a face (221) of the interjoists (220) and an edge cleared by the depression (229). ).

20. Modular element according to any one of the preceding claims, characterized in that the lower middle part of the interjoists (120) comprises a reserve in which is secured a panel (120A) made of a material having acoustic characteristics greater than those of material in which is realized the rest of the interjoists.

21. A method of manufacturing a modular element according to any one of the preceding claims, characterized in that a section (30, 40; 130, 140) is secured near one of the longitudinal sides (23, 24; 124; 223, 224) of a interjoists (20; 120; 220).

22. A method of manufacturing a modular element according to claim 20, characterized in that a section (30, 40; 130, 140) is secured to each of the longitudinal sides (23, 24; 123, 124; 223, 224). ) opposite of the interjoists (20; 120; 220).

23. A method of manufacturing a modular element according to claim 21 or 22, characterized in that a profile (30, 40;

140) at each of the opposite longitudinal sides (23, 24; 123, 124; 223, 224) of the interjoists (20; 120; 220).

24. A method of manufacturing a modular element according to claim 21 or 22, characterized in that a molded interjoists (20, 120; 220) are produced on the inner surfaces of the profile (30, 40; 140) constituting one or more surfaces of the mold in which the interjoists are molded.

25. Dry floor comprising a plurality of prefabricated modular elements according to any one of claims 1 to 20, characterized in that the plurality of modular elements (10; 110; 210) are arranged in parallel, the profile or profiles (30, 40, 130, 140) of each of the modular elements cooperating with the profile (30, 40; 130, 140) of the juxtaposed modular element, and mechanically fixed to each other.

26. Dry floor according to claim 25, characterized in that one of the profiles (30; 130) of each of the modular elements is fitted into a profile (40; 140) of a modular element (10; 110; 210) juxtaposed .

27. Dry floor according to claims 25 or 26, characterized in that the upper surface of the dry floor comprising the plurality of juxtaposed modular elements (10; 110; 210) is substantially continuous and flat.

28. Dry floor according to claim 27, characterized in that the exposed surface of the dry floor defined by the upper face (21; 121; 221) interjoists (20; 120; 220), the interjoists of the juxtaposed modular elements being in edge-to-edge contact.

29. Dry floor according to claim 27, characterized in that the exposed surface of the dry floor is defined by the upper face (122) of interjoists and the upper surface of a sole (132, 142) of the profile (130, 140). arranged between the upper face of the interjoists modular elements juxtaposed.

30. Dry floor according to claims 25 to 29, characterized in that the lower surface of the plurality of modular elements (10; 110; 210) is substantially flat.

31. Dry floor according to claim 30, characterized in that the underside of the dry floor is defined by the underside of the interjoists interjoists being in edge-to-edge contact.

32. Dry floor according to claim 30, characterized in that the lower surface of the dry floor is defined by the lower face (21; 121;

221) interjoists and the outer surface of a sole (34, 44; 134, 144) of the profile (30, 40; 130, 140) disposed between the underside of the interjoists modular elements juxtaposed.

33. Dry floor according to any one of claims 21 to 32, characterized in that one or more insulating plates (50; 150) cover the lower surface of the plurality of modular elements.

34. Dry floor according to any one of claims 25 to 33, characterized in that returns (35, 45; 133, 135, 143, 145) at the free end of the flanges (34, 44, 132, 134, 142, 144) of the profiles (30, 40; 130; 140) are inserted into slots or notches (21A, 21B; 121A, 121B, 122B; 221A, 221B, 222B) made in one face of the interjoists.