System for Forming Ventilated Crawl Spaces or Interspaces or Elevated Platforms Composed by Dome-Shaped Formwork Elements Supported on Supporting Tubes Resting on a Foundation or on a Surface

Abstract

A system for forming ventilated crawl spaces or interspaces or elevated platforms which comprise dome-shaped formwork elements supported on supporting tubes; the ventilated crawl space or interspace or elevated platform comprises first, second and third interconnection elements, which communicate with a lower end of the supporting tubes, which are adapted to form a channeled receptacle, which rests on a foundation or surface, for reinforcements; such channeled receptacle is adapted to receive a concrete casting to form a connecting beam between the supporting tubes.

Claims

1. A system for forming ventilated crawl spaces or interspaces or elevated platforms which comprise dome-shaped formwork elements supported on supporting tubes, wherein said ventilated crawl space or interspace or elevated platform comprises first, second and third interconnection means, which communicate with a lower end of said supporting tubes, which are adapted to form a channeled receptacle, which rests on a foundation or on a surface, for reinforcements and is adapted to receive a concrete casting to form a connecting beam between said supporting tubes.

2. The system according to claim 1, wherein said first interconnection means, associable with the lower end of said supporting tubes and communicating with said supporting tubes, are constituted by feet which have a pedestal, substantially circular in plan, from which a hollow and substantially cylindrical body protrudes axially, on which four first openings are provided diametrically, said pedestal being blended with said body by means of reinforcement ribs which act in regions adjacent to said first openings.

3. The system according to claim 1, wherein a center distance provided between two of said first interconnection means, which are mutually contiguous, with which said second and third interconnection means are associated, corresponds to a center distance between the overlying formwork elements supported by said supporting tubes the lower ends of which are interconnected to said first interconnection means, said supporting tubes being perfectly vertical.

4. The system according to claim 2, wherein on said pedestal there are first appendages, either of the quick-coupling type and thus substantially cylindrical in shape with elastically-compressible axial splits or constituted by a pair of ridges which protrude in a region interposed between two of said ribs at each of said first openings, second appendages protruding from the portion of said pedestal that is within said body and lying at a same radius that passes through said first appendages.

5. The system according to claim 4, wherein an upper end of said body, having a circular shape, is constituted by four distinct annular elements, a second opening adapted to permit the placement of at least one rebar being defined between each of said two annular elements that are mutually adjacent.

6. The system according to claim 5, wherein said four distinct annular elements are arranged along a circular arc defined by two radii passing through a midpoint of each of said first openings, said second opening lying on a diametrical plane that passes through two of said first appendages, third appendages protruding upward from each of said annular elements, an outside diameter of said annular elements being substantially equal to an inside diameter of said supporting tubes.

7. The system according to claim 6, wherein said first openings can be closed, in particular on a side of said feet that are not connected to other feet, as in the case of feet placed on the outside perimeter of said ventilated crawl space or interspace or elevated platform, by means of partitions which are constituted by a front wall, which is arced and shaped complementarily to said first openings and from a lower end of which a wing protrudes at right angles which is shaped like a circular sector and is adapted to be positioned inside said body, a first hole being provided in each wing and being arrangeable on one of said second appendages, a first raised portion protruding externally from said front wall of each of said partitions, starting from an upper end, and being substantially parallelepipedal in shape, arranged axially and in a central region of said front wall, said lower end of one of said overlying supporting tubes being able to rest on said first raised portion once one of said feet has been installed and one of said partitions has been associated with it.

8. The system according to claim 7, wherein said first raised portion has a pair of tabs which protrude transversely from the first raised portion and are arranged, once one of said feet has been installed and one of said partitions has been associated with it, below said second opening, so as to interact with said body of said foot and improve the grip of said partition.

9. The system according to claim 6, wherein said second interconnection means, which are associable with each of said feet, are constituted by lower half-tunnels which are, in a transverse cross-section, substantially U-shaped so as to define a first end face from which a pair of first wings extends, a length of said lower half-tunnels being determined as a function of dimensions of remaining components of said ventilated crawl space while a width and a height of said lower half-tunnels is such as to allow their placement in an interspace defined by said first opening, so that said first end face rests on said pedestal and said first wings rest on said ribs, fourth appendages protruding from said first end face at right angles, proximate to the lateral ends, and being axially perforated, substantially cylindrical, and of a chosen height.

10. The system according to claim 9, wherein once one of said lower half-tunnels has been installed, said fourth appendages accommodate one of said first appendages in order to determine a stable connection with said foot, first engagement means being associated with an outer lateral surface of each of said first wings and being located proximate to a longitudinal perimetric edge of said first wings and being constituted by T-shaped mushroom-like members a stalk of which protrudes at right angles from said outer lateral surface and the head of which is arranged approximately parallel to said outer lateral surface, said mushroom-like members being in a chosen number and being arranged in pairs along a same axis which is transverse to said lower half-tunnel; each pair being arranged at a chosen distance from the other, first reinforcement ridges being present outside each of said lower half-tunnels, for part of their length, and being arranged parallel to each other and transversely to said lower half-tunnel, which, once installed, rests on a foundation or surface, said head being capable of being slightly axially offset, in a direction of inclined portions, with respect to said stalk, a clearance being present between said feet and said lower half-tunnel since said fourth appendages have an inside diameter that is greater than the outside diameter of said first appendages.

11. The system according to claim 10, wherein said first wings have, at one of said lateral terminal ends, one of said inclined portions adapted to facilitate an insertion of third interconnection means.

12. The system according to claim 10, wherein said third interconnection means, associable with each of said feet, are constituted by upper half-tunnels which are, in a transverse cross-section, substantially U-shaped so as to define a second end face or cover from which a pair of second wings extends, a length of said upper half-tunnels being determined as a function of dimensions of remaining components of said ventilated crawl space or interspace or elevated platform and being substantially equal to the length of said lower half-tunnels, second engagement means being associated with an outer lateral surface of each of said second wings and being located proximate to a longitudinal perimetric edge of said second wings, said second engagement means being constituted by L-shaped hooks which protrude beyond a longitudinal perimetric edge of said second wings and a free end of each of which is directed and oriented toward a same end of the two lateral ends of each of said upper half-tunnels.

13. The system according to claim 12, wherein a distance between two of said mutually adjacent pairs of hooks is such as to allow, during laying, an overlapping, on the respective longitudinal perimetric edges of said first and second wings, of said lower half-tunnels and upper half-tunnels so that said hooks are positioned alongside said mushroom-like members with said free ends placed below said heads.

14. The system according to claim 13, wherein as a result of an axial displacement of said upper half-tunnel with respect to said lower half-tunnel, the displacement and engagement of said free end of each of said hooks with one of said heads is achieved, allowing a mutual and stable coupling of said upper and lower half-tunnels to each other.

15. The system according to claim 14, wherein outside each of said upper half-tunnels there are, for part of length thereof, second reinforcement ridges arranged parallel to each other and transversely to said upper half-tunnel.

16. The system according to claim 12, wherein second raised portions are present at each of said lateral ends and protrude axially and outside said second end face or cover and are substantially parallelepipedal in shape and of suitable length, said second raised portions having dimensions such that they can be positioned and accommodated in said second openings present in said feet so that when said supporting tube is installed, it rests with its lower end on said second raised portion proper.

17. The system according to claim 16, wherein a width and a height of said upper half-tunnels is such as to allow placement thereof in an interspace defined by said first opening, and wherein once it is associated with said lower half-tunnel, a lower end of one of said supporting tubes rests on said second raised portions.

18. The system according to claim 12, wherein said first, second and third interconnection means, once installed and therefore associated with said lower end of said supporting tubes and with said foot, form a channeled receptacle which communicates between the upper ends of said supporting tubes with which the dome-shaped formwork elements that constitute the ventilated crawl space or interspace or elevated platform are associated, each of said channeled receptacles extending within each one of said supporting tubes, within each one of said feet, and within said lower half-tunnel and said upper half-tunnel, once they are coupled to each other.

19. The system according to claim 18, wherein rebars are positioned within each of said channeled receptacles, in number and with dimensions correlated to the dimensions of said ventilated crawl space or interspace or elevated platform, said rebars being substantially L-shaped so as to define a reinforcement which is adapted to receive a concrete casting in order to form a connecting beam between said channeled receptacle and said supporting tubes.

20. A method for installing ventilated crawl spaces or elevated platforms in general according to claim 1, comprising the steps of: laying first interconnection means, provided by feet, on a foundation or surface, one lower half-tunnels is placed between two of said feet which are adjacent, placing lateral ends thereof at first openings, positioning rebars inside said feet and inside a lower half-tunnel, inserting in the first opening one of lateral ends of an upper half-tunnel, taking care to tilt said upper half-tunnel so that a lateral end thereof rests on an inclined portion of said lower half-tunnel, pushing said upper half-tunnel inside the foot, rotating it until it is positioned at an underlying lower half-tunnel, in this condition hooks being laterally adjacent to mushroom-like members, moving said upper half-tunnel axially toward said foot that is not yet engaged, so achieving mutual coupling between said hooks and said mushroom-like members as well as a positioning of raised portions at second openings provided on said feet, mutually fixing said lower half-tunnel and said upper half-tunnel in a manner that is stable and resistant to the pressures that will occur during the final pouring of the fluid concrete, placing said supporting tubes at appendages of said feet until their lower end rests on annular elements, and then associating upper ends of said supporting tubes with said dome-shaped formwork elements, prior to the insertion of supporting tubes onto said appendages of said feet, unaffected first openings of said second and third interconnection means being closed by means of partitions which, if necessary, are inserted from above and from the inside of said feet, where the partitions are guided into a correct position for closing said opening by virtue of a shape structure of an arced front wall thereof and the presence of a wing shaped like a circular sector which is positioned within said body, and the presence of a first raised portion having a pair of tabs which are arranged, once one of said feet is installed and one of said partitions is associated with it, below said second opening, and the presence of said second appendages, which protrude from said pedestal and on which first holes provided in said wing of said partition are positioned, pouring concrete into said channeled receptacle.

21. Ventilated crawl spaces or interspaces or elevated platforms, comprising first, second and third interconnection means, which communicate with a lower end of supporting tubes, which are adapted to form a channeled receptacle, which rests on a foundation or on a surface, for reinforcements and is adapted to receive a concrete casting to form a connecting beam between said supporting tubes.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Further characteristics and advantages of the disclosure will become better apparent from the detailed description of a particular, but not exclusive, aspect, illustrated by way of non-limiting example in the accompanying drawings wherein:

[0019] FIG. 1 is a perspective view of the ventilated crawl space or interspace or elevated platform;

[0020] FIG. 2 is a partially cross-sectional view of a part of the ventilated crawl space or interspace or elevated platform of FIG. 1;

[0021] FIG. 3 is a side view of the disclosure of the previous figure;

[0022] FIG. 4 is a view from above of the disclosure of the previous figure;

[0023] FIG. 5 is a cross-sectional view taken along the line V-V in FIG. 4;

[0024] FIG. 6 shows a detail of the previous figure;

[0025] FIG. 7 is an exploded side view of the components in FIG. 2;

[0026] FIG. 8 is a perspective side view of a lower half-tunnel;

[0027] FIG. 9 is a view from above of the lower half-tunnel of the previous figure;

[0028] FIG. 10 is a front elevation view of the lower half-tunnel of the previous figure;

[0029] FIG. 11 is a perspective side view of an upper half-tunnel;

[0030] FIG. 12 is a front elevation view of the upper half-tunnel of the previous figure;

[0031] FIG. 13 is a perspective side view of a foot without a partition;

[0032] FIG. 14 is a first side view of the foot of the previous figure with the partition removed;

[0033] FIG. 15 is a second side view of the foot and the partition of the previous figure, rotated ninety degrees;

[0034] FIG. 16 is a side view of the foot with the partition associated with it;

[0035] FIG. 17 is a cross-sectional view taken along the line XVII-XVII of FIG. 16;

[0036] FIG. 18 is a cross-sectional view taken along the line XVIII-XVIII of FIG. 16;

[0037] FIG. 19 is a view similar to FIG. 14, partially cross-sectional, illustrating the positioning of the lower half-tunnel without the upper half-tunnel;

[0038] FIGS. 20, 21, 22 and 23 and 25, 26, 27, and 28 show the assembly sequence of the various components of the ventilated crawl space or interspace or elevated platform of FIG. 1;

[0039] FIG. 24 is a cross-sectional view taken along a plane diametrical to the feet of FIG. 23.

[0040] In the aspects illustrated, individual characteristics shown in relation to specific examples may in reality be interchanged with other, different characteristics, existing in other aspects.

DETAILED DESCRIPTION

[0041] With reference to the figures, the system described below makes it possible to provide ventilated crawl spaces, ventilated floors, interspaces and elevated platforms in general, designated with the reference numeral 1, for example used in the construction and renovation of civil and industrial buildings, tanks for collecting and accumulating runoff rainwater, septic tanks, buried channels, honeycomb concrete beds, cold rooms or freezer rooms, pools, raised platforms, railway platforms or footpaths, plazas and terraced urban furnishing elements.

[0042] The ventilated crawl space or interspace or elevated platform 1 thus obtained comprises a plurality of formwork elements 2, disposable, dome-shaped, conventional, and arranged in several rows in a matrix arrangement and made with suitable and selected materials, such as for example plastic material, and which advantageously are quadrilateral in plan view and are dome-shaped.

[0043] Such formwork elements 2 are generally formed by a dome 3 that extends laterally and downward with four legs 4.

[0044] The legs 4 form four side arches, the edges of which are contoured to form a recess which is open upward, in order to allow the coupling by overlapping of contiguous dome-shaped formwork elements 2.

[0045] Each one of the legs 4 can, at the lower end 5, be associated with the edge 6 of the upper end 7 of a supporting tube 8 which is arranged vertically, and this supporting tube 8, which is disposable, is preferably circular in cross-section.

[0046] An example of this implementation is given in EP1092816B1.

[0047] The ventilated crawl space or interspace or elevated platform 1 comprises first interconnection means, which are associable with the lower end 9 of the supporting tubes 8 and communicating with them, and are constituted by feet 10 which have a pedestal 11, preferably circular in plan, from which a hollow and preferably cylindrical body 12 protrudes axially, on which four first openings 13 are provided diametrically.

[0048] Advantageously the pedestal 11 is blended with the body 12 by means of adapted reinforcement ribs 14 which act in regions adjacent to the first openings 13.

[0049] On the pedestal 11 there are first appendages 15, either of the quick-coupling type and therefore substantially cylindrical with elastically-compressible axial splits (as shown in FIG. 13) or constituted by a pair of mutually parallel ridges (as shown in FIG. 2), which protrude in a region interposed between two of the ribs 14 at each of the first openings 13.

[0050] Second appendages 16 with cylindrical form furthermore protrude from the portion of the pedestal 11 that is within the body 12, and lie on the same radius that passes through the first appendages 15.

[0051] The upper end 17 of the body 12, which is circular, is constituted by four distinct annular elements 18 which are arranged along a circular arc defined by two radii passing through the midpoint of each of the first openings 13 so as to form, between each of the two adjacent annular elements, a second opening 19 which lies on a diametrical plane that passes through two of the first appendages 15.

[0052] Third appendages 18 protrude upward from each of the annular elements 20.

[0053] The outside diameter of the annular elements 18 is substantially equal to the inside diameter of the supporting tubes 8.

[0054] Then it is possible to insert the supporting tubes 8 onto the annular elements 18 until the lower end 9 of the supporting tubes 8 rests upon the annular elements 18 proper.

[0055] The first openings 13 can be closed, in particular on the side of the feet 10 that are not directly connected to other feet 10, as in the case of the feet 10 located on the outer perimeter of the ventilated crawl space or interspace or elevated platform 1, by means of adapted partitions 21 which are constituted by a front wall 22, which is arced and shaped complementarily to the first openings 13, from the lower end of which a wing 23 protrudes at right angles which is shaped like a circular sector and is adapted to position itself inside the body 12.

[0056] A first hole 24 is provided in each wing 23 and is arrangeable on one of the second appendages 16.

[0057] A first raised portion 26 protrudes externally from the front wall 22 of each partition 21, starting from the upper end 25, and is substantially parallelepipedal in shape, arranged axially and in a central region of the front wall 22.

[0058] The lower end 9 of an overlying supporting tube 8 can rest on the first raised portion 26 once a foot 10 has been installed and a partition 21 has been associated with it.

[0059] Likewise, the first raised portion 26 has a pair of tabs 50a, 50b which protrude transversely from it and arrange themselves, once a foot 10 has been installed and a partition 21 has been associated with it, below the second opening 19, so as to interact with the body 12 of the foot 10 and improve the grip of the partition 21, as shown for example in FIG. 17.

[0060] When a foot 10 is installed, it rests on a foundation or surface 37.

[0061] The ventilated crawl space or interspace or elevated platform 1 comprises second interconnection means, which are associable with each foot 10 and are constituted by lower half-tunnels 27 which are, in a transverse cross-section, substantially U-shaped so as to define a first end face 28 from which a pair of first wings 29a, 29b extends.

[0062] The length of the lower half-tunnels 27 will be determined as a function of the dimensions of the remaining components of the ventilated crawl spaces 1.

[0063] The width and the height of the lower half-tunnels 27 is such as to allow their placement in the interspace defined by the first opening 13, so that the first end face 28 rests on the pedestal 11 and the first wings 29a, 29b rest on the ribs 14.

[0064] Fourth appendages 31a, 31b protrude from the first end face 28 at right angles, proximate to the lateral ends 30a, 30b, and are axially perforated, substantially cylindrical, and of a chosen height.

[0065] Once a lower half-tunnel 27 has been installed, the fourth appendages 31a, 31b accommodate one of the first appendages 15 in order to determine a precise and stable connection with the foot 10.

[0066] Still in the condition wherein a lower half-tunnel 27 has been installed, a clearance 51 is present between the foot 10 and the lower half-tunnel 27 since the fourth appendages 31a, 31b have an inside diameter that is greater than the outside diameter of the first appendages 15, as shown in FIG. 6.

[0067] First engagement means are associated with the outer lateral surface 32 of each of the first wings 29a, 29b and are located proximate to the longitudinal perimetric edge of the first wings 29a, 29b and constituted by T-shaped mushroom-like members 33 the stalk 34 of which protrudes at right angles from the outer lateral surface 32 and the head 35 of which is arranged approximately parallel to the outer lateral surface 32.

[0068] There is a chosen number of mushroom-like members 33 and they are arranged in pairs along a same axis which is transverse to the lower half-tunnel 27; each pair is arranged at a chosen distance from the other.

[0069] Advantageously, outside each of the lower half-tunnels 27 there are, for part of their length, first reinforcement ridges 36 arranged parallel to each other and transversely to the lower half-tunnel 27.

[0070] Once it has been installed, a lower half-tunnel 27 rests, as shown in FIGS. 1 and 5, on a foundation or surface 37.

[0071] Conveniently, the first wings 29a, 29b have, at one of the lateral terminal ends 30a, 30b, an inclined portion 38 adapted to facilitate the insertion of third interconnection means 39, as described below.

[0072] The head 35 can also be slightly axially offset, in the direction of the inclined portions 38, with respect to the stalk 34.

[0073] The ventilated crawl space or interspace or elevated platform 1 comprises third interconnection means, which are associable with each foot 10 and are constituted by upper half-tunnels 39 which are, in a transverse cross-section, substantially U-shaped so as to define a second end face or cover 40 from which a pair of second wings 41a, 41b extends.

[0074] The length of the upper half-tunnels 40 will be determined as a function of the dimensions of the remaining components of the ventilated crawl spaces 1 and will substantially be equal to the length of the lower half-tunnels 27.

[0075] Second engagement means are associated with the outer lateral surface 42 of each of the second wings 41a, 41b and are located proximate to the longitudinal perimetric edge of the second wings 41a, 41b, the second engagement means being constituted by L-shaped hooks 43 which protrude beyond the longitudinal perimetric edge of the second wings 41a, 41b and the free end 44 of each of which is directed and oriented toward the same end of the two lateral ends 45a, 45b of each upper half-tunnel 39.

[0076] There is a chosen number of hooks 43 and they are arranged in pairs along a same axis which is transverse to the upper half-tunnel 39; each pair is arranged at a chosen distance from the other.

[0077] The distance between two of the mutually adjacent pairs of hooks 43 is such as to allow, during laying, the overlapping, on the respective longitudinal perimetric edges of the first and second wings 29a, 29b, 41a, 41b, of the lower half-tunnels 27 and upper half-tunnels 39 so that the hooks 43 are positioned alongside the mushroom-like members 33 with the free ends 44 placed below the heads 35.

[0078] As a result of an axial displacement of the upper half-tunnel 39 with respect to the lower half-tunnel 27, as shown in FIG. 26, the displacement and engagement of the free end 44 of each hook 43 with one of the heads 35 is achieved, allowing the mutual and stable coupling of the upper and lower half-tunnels 39, 27 to each other.

[0079] Advantageously, outside each of the upper half-tunnels 39 there are, for part of their length, second reinforcement ridges 46 arranged parallel to each other and transversely to the upper half-tunnel 39.

[0080] Second raised portions 47 are present at each of the lateral ends 45a, 45b and protrude axially and outside the second end face or cover 40 and are substantially parallelepipedal in shape and of suitable length.

[0081] The second raised portions 47 have dimensions such that they can be positioned and accommodated at the second openings 19 present in the feet 10 so that, when the supporting tube 8 has been installed, it rests with its lower end 9 on that same second raised portion.

[0082] The width and the height of the upper half-tunnels 39 is such as to allow their placement in the interspace defined by the first opening 13, and in that once it is associated with the lower half-tunnel 27, the lower end 9 of a supporting tube 8 rests on the second raised portions 47.

[0083] The first, second and third interconnection means 10, 27, 39, once installed and therefore associated with the lower end 9 of the supporting tubes 8 and with the foot 10, form a channeled receptacle 48 which communicates between the various upper ends 7 of the supporting tubes 8 with which the dome-shaped formwork elements 2 that constitute the ventilated crawl space or interspace or elevated platform 1 are associated.

[0084] Each channeled receptacle 48 therefore extends within each supporting tube 8, within each foot 10 and within the lower half-tunnel 27 and upper half-tunnel 39, once they are coupled to each other.

[0085] Rebars 49 can be positioned within each channeled receptacle 48, in number and with dimensions correlated to the dimensions of said ventilated crawl space or interspace or elevated platform 1, the rebars being advantageously L-shaped so as to define a reinforcement which is adapted to receive a concrete casting in order to form a connecting beam between the channeled receptacle 48 and the supporting tubes 8.

[0086] It should be noted that the center distance created between two mutually contiguous feet 10 with which the lower half-tunnels 27 and the upper half-tunnels 39 are associated, is exactly the same as the center distance of the overlying formwork 2 supported by the supporting tubes 8 the lower ends 9 of which are interconnected with the feet 10.

[0087] In other words, the supporting tubes 8 are perfectly vertical.

[0088] The method of assembly of the ventilated crawl space or interspace or elevated platform 1 is the following: initially the feet 10 are placed on the foundation or surface 37; subsequently a lower half-tunnel 27 is placed between two adjacent feet, placing its lateral ends 30a, 30b at the first openings 13.

[0089] Then the rebars 49 are positioned inside the feet 10 and inside the lower half-tunnel 27.

[0090] Then one of the lateral ends 45a, 45b of the upper half-tunnel 39 is inserted in the first opening 13, taking care to tilt the upper half-tunnel 39 so that its lateral end rests on the inclined portion 38 of the lower half-tunnel 27, as shown in FIG. 24.

[0091] Then the upper half-tunnel 39 is pushed inside the foot 10, rotating it until it is positioned at the underlying lower half-tunnel 27.

[0092] In this condition the hooks 43 are laterally adjacent to the mushroom-like members 33: the subsequent axial displacement of the upper half-tunnel 39 toward the foot 10 that is not yet engaged entails the mutual coupling between the hooks 43 and the mushroom-like members 33 as well as the positioning of the second raised portions 47 at the second openings 19 provided on the feet 10.

[0093] The lower half-tunnel 27 and upper half-tunnel 39 will be fixed to each other in a manner that is stable and resistant to the pressures that will occur during the final pouring of the fluid concrete.

[0094] Subsequently, the supporting tubes 8 are positioned on the third appendages 20 of the feet 10 and then the disposable dome-shaped formwork elements 2 are associated with the upper ends 7 of the supporting tubes 8.

[0095] Prior to the insertion of the supporting tubes 8 onto the third appendages 20 of the feet 10, the first openings 13 that are unaffected by the second and third interconnection means 27, 39 are closed by means of the partitions 21.

[0096] The partitions 21, if necessary, are inserted from above and from the inside of the feet 10, where they are guided into the correct position for closing the opening 13 by virtue of the shape structure of the arced front wall 22 thereof and the presence of the wing 23 shaped like a circular sector which is positioned within the body 12, and the presence of the first raised portion 26 having the pair of tabs 50a, 50b which arrange themselves, once a foot 10 is installed and a partition 21 is associated with it, below the second opening 19, and the presence of the second appendages 16, which protrude from the pedestal 11 and on which the first holes 24 provided in the wing 23 of the partition are positioned.

[0097] In the final step, the concrete is poured into the channeled receptacle 48 thus obtained.

[0098] For the pouring, a fluid concrete with inert materials of a suitable particle size distribution must be used, so that the channeled receptacles 48 are completely filled and as a consequence the connecting beams between the columns determined by the supporting tubes 8 form downwardly, resting on the foundation or surface 37.

[0099] Thus it has been found that the system according to the disclosure has achieved the intended aim and objects, a system having been obtained for providing ventilated crawl spaces and ventilated floors, which is constituted by dome-shaped formwork elements which are connected to each other via overlapping of the respective side edges and with which tubular elements are associated downwardly which are arranged vertically on the ground, so as to increase their height above the ground, such system making it possible to obtain a nascent concrete structure, known as a trellis, a grid or a lattice, which offers excellent static characteristics over time.

[0100] The system thus provided is low cost and is simple to execute on-site.

[0101] The disclosure is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims.

[0102] Naturally the materials used as well as the dimensions of the individual components of the disclosure may be more relevant according to specific requirements.

[0103] The characteristics indicated above as advantageous, convenient or the like, may also be missing or be substituted by equivalent characteristics.