WO2025074267A1

WO2025074267A1 - Assembly for fixing a prop to a grid-like structure for the provision of floor slabs

Info

Publication number: WO2025074267A1
Application number: PCT/IB2024/059629
Authority: WO
Inventors: Giacomo DALLA FONTANA; Guido Faresin
Original assignee: Faresin Formwork SpA
Current assignee: Faresin Formwork SpA
Priority date: 2023-10-04
Filing date: 2024-10-02
Publication date: 2025-04-10
Anticipated expiration: 2026-04-04

Abstract

An assembly (10, 110) for fixing a prop (11, 111) to a grid-like structure (12, 112) for the provision of floor slabs, which comprises in the following order: - a first fixing portion (13, 113), to be associated with the grid-like structure (12, 112) and with the upper end of the prop (11, 111), - a post (14, 114), extending between the first fixing portion (13, 113) and a second fixing portion (15, 115), - the second fixing portion (15, 115), arranged below the first fixing portion (13, 113) to be associated with the prop (11, 111) and with the grid¬ like structure (12, 112), the second fixing portion (15, 115) comprising means (16, 116) for quick coupling to the prop (11, 111).

Description

ASSEMBLY FOR FIXING A PROP TO A GRID-LIKE STRUCTURE FOR THE PROVISION OF FLOOR SLABS

The present invention relates to an assembly for fixing a prop to a grid-like structure for the provision of floor slabs.

Nowadays, for providing concrete floor slabs, formwork panels with lengths in the order of 25 m and casting surfaces of up to 150 m² are widely used.

Such formwork panels are made by coupling grid-like structures, such as trusses, to props for resting on the ground.

Secondary beams are arranged above the grid-like structures, to support panels adapted to define the casting surface.

Such prior art has a number of drawbacks.

In fact the coupling between props and grid-like structures is done using fixing elements such as bolts, and this results in a procedure to assemble and disassemble the formwork that is long and inconvenient.

The aim of the present invention is to provide an assembly for fixing a prop to a grid-like structure for the provision of floor slabs that is capable of improving the known art in one or more of the above-mentioned aspects.

Within this aim, an object of the invention is to provide an assembly for fixing a prop to a grid-like structure for the provision of floor slabs that enables construction of formwork that is easier and quicker with respect to what occurs in the prior art.

Another object of the invention is to provide an assembly for fixing a prop to a grid-like structure for the provision of floor slabs that necessitates a limited number of bolts and in any case a fewer number of bolts than are used in similar solutions in the prior art.

A further object of the invention is to provide an assembly for fixing a prop to a grid-like structure for the provision of floor slabs that allows the fully assembled formwork to be lifted and shifted, in order to speed up its use on the site. Furthermore, the present invention sets out to overcome the drawbacks of the background art in a manner that is alternative to any existing solutions.

Another object of the invention is to provide an assembly for fixing a prop to a grid-like structure for the provision of floor slabs that is highly reliable, easy to implement, and at low cost.

This aim and these and other objects which will become better apparent hereinafter are achieved by an assembly for fixing a prop to a gridlike structure for the provision of floor slabs, said assembly being characterized in that it comprises in the following order:

- a first fixing portion to be associated with said grid-like structure and with the upper end of said prop,

- a post, extending between said first fixing portion and a second fixing portion,

- said second fixing portion, arranged below said first fixing portion, to be associated with said prop and with said grid-like structure, said second fixing portion comprising means for quick coupling to said prop.

Further characteristics and advantages of the invention will become better apparent from the detailed description that follows of a preferred, but not exclusive, embodiment of the assembly for fixing a prop to a grid-like structure for the provision of floor slabs, according to the invention, which is illustrated by way of non-limiting example in the accompanying drawings wherein:

- Figure 1 is a perspective view of a first embodiment of an assembly for fixing a prop to a grid-like structure for the provision of floor slabs, according to the invention in a use application;

- Figure 2 is a perspective view of the use application of the fixing assembly of Figure 1, wherein some elements have been omitted;

- Figures 3a and 3b are two different perspective views of the fixing assembly of Figure 1, in a first configuration; - Figure 4 is a perspective view of an enlarged detail of a first part of the fixing assembly of Figure 3b;

- Figures 5a and 5b are two different perspective views of the fixing assembly of Figure 1, in a second configuration;

- Figure 6 is an enlarged detail view of a second part of the fixing assembly, according to the invention;

- Figures 7a, 7b and 7c are three different front perspective views of a second embodiment of an assembly for fixing a prop to a grid-like structure for the provision of floor slabs, according to the invention, in the open configuration;

- Figure 8 is a perspective view of an enlarged detail of the fixing assembly of Figure 7a;

- Figures 9 a and 9b are two different rear perspective views of the fixing assembly of Figures 7a, 7b and 7c;

- Figure 10 is a perspective view of a use application of the fixing assembly of Figures 7a, 7b and 7c;

- Figures 11 and 12 are two different perspective views of use applications of the fixing assembly of Figures 7a, 7b and 7c;

- Figures 13a, 13b and 13c are cross-sectional views from above of the fixing assembly of Figures 7a, 7b and 7c in a use application.

With reference to Figures 1 to 6, an assembly for fixing a prop to a grid-like structure for the provision of floor slabs, according to the invention, in a first embodiment, is generally designated by the reference numeral 10.

Figures 1 and 2 show a use application of a plurality of fixing assemblies 10, according to the invention, which connect a respective prop

11 to a respective grid-like structure 12 constituted by a truss.

In particular, the fixing assembly 10 comprises in the following order:

- a first fixing portion 13 to be associated with the grid-like structure

12 and with the upper end of a prop 11, - a post 14, extending between the first fixing portion 13 and a second fixing portion 15,

- such second fixing portion 15, arranged below the first fixing portion 13 to be associated with the prop 11 and with the grid-like structure 12, such second fixing portion 15 comprising means 16 for quick coupling to the prop 11.

In the present description, the terms “upper”, “lower”, “above”, “below”, etc., refer to the configuration for use of the fixing assembly 10.

The expression “quick coupling means” in the present description means coupling means that do not require the use of a tool in order to be closed or opened.

The first fixing portion 13 comprises:

- a plate 17, arranged on a plane that is at right angles to the axis of extension of the post 14 and provided with first through holes 21 for the insertion of fixing screws (not shown in the figures) at the upper end of the prop 11,

- a first bracket 18, arranged above the plate 17 to be associated with the grid-like structure 12, such first bracket 18 having a substantially C- shaped cross-section with the core 19 of the C-shape arranged parallel to the axis of extension of the post 14 and being provided with a plurality of second holes 20 for the insertion of screws (not shown in the figures) for fixing to the grid-like structure 12,

- two flaps 22a, 22b, which are mirror-symmetrical with respect to the sagittal plane of symmetry of the fixing assembly 10, which have a an L- shaped cross-section, such flaps 22a, 22b extending from the plate 17, below it,

- two first appendages 24a, 24b, which are mirror- symmetrical with respect to the sagittal plane of symmetry of the fixing assembly 10, such first appendages 24a, 24b extending from the plate 17, below it, and being each provided with a third through hole 25a, 25b for the insertion of a first pin 26,

- a raised portion/pin 27, extending from the plate 17, at right angles to it and below it, such raised portion/pin 27 having an axis of extension that lies substantially on the sagittal plane of symmetry of the fixing assembly 10, and being adapted to center the upper plate 23 of the prop 11.

The term “sagittal plane”, in the present description, means the plane that runs in the fore-and-aft direction dividing a body into two parts, right and left.

The first bracket 18 is integral with and fixed to the post 14.

The flaps 22a, 22b define an insertion seat for the upper plate 23 of the prop 11.

The first pin 26 has an L-shaped extension with a first core 29 and a first wing 30, and is provided with a first lug 28 which is arranged at right angles to the axis of extension of the first core 29 proximate to its free end.

Advantageously, at least one third hole 25b has an edge which is shaped so as to:

- allow the passage of the first core 29 with the first lug 28, when the latter is arranged in a preset position,

- produce an interference with the first lug 28, so preventing the removal of the first pin 26 from such third hole 25b, when the first lug 28 is arranged in a position other than the preset one.

The first lug 28 has an axis of extension that lies on a plane which is parallel to the plane of arrangement of the axis of extension of the first wing 30, and rotated with respect to it.

In this manner, after inserting the first core 29 with the first lug 28 into the third hole 25b, by virtue of the force of gravity, the first wing 30 is arranged vertically, below the first core 29, as a consequence rotating the latter and shifting the first lug 28 so as to produce an interference between the first lug 28 and the edge of the third hole 25b.

The second fixing portion 15 comprises: - a second bracket 31 to be associated with the grid-like structure 12, such second bracket 31 having a substantially C-shaped cross-section with the core 32 of the C- shape arranged parallel to the axis of extension of the post 14 and being provided with a plurality of fourth through holes 33 for the insertion of screws (not shown in the figures) for fixing to the grid-like structure 12,

- the means 16 for quick coupling to the prop 11, constituted by a clamp provided with:

- a fixed part 34, extending monolithically with the second bracket 31,

- a jaw 35, which is hinged to the fixed part 34 and can move on a plane that is at right angles to the axis of extension of the post 14.

The jaw 35 has two parallel arc-like elements 36, which lie on planes that are at right angles to the axis of extension of the post 14, and which are at least partially shaped complementarily to the profile of the prop 11 , and which have:

- a first end 37, coupled to the fixed part 34,

- a second end 38, with a fifth through hole 39.

Each fifth hole 39 is adapted to correspond to a respective sixth through hole 40, which is provided on the fixed part 34, for the insertion of a second pin 41.

The second pin 41 has an L-shaped extension with a second core 42 and a second wing 43, and is provided with a second lug 44 which is arranged at right angles to the axis of extension of the second core 42 proximate to its free end.

Advantageously, each fifth hole 39 and each sixth hole 40 has an edge which is shaped so as to:

- allow the passage of the second core 42 with the second lug 44, when the latter is arranged in a preset position,

- produce an interference with the second lug 44, so preventing the removal of the second pin 41 from the fifth hole 39 and from the sixth hole 40 when the second lug 44 is arranged in a position other than the preset one.

The post 14 is fixed:

- at a first end, to the first fixing portion 13,

- at a second end, which is opposite to the preceding one, to the second fixing portion 15.

In particular, the post 14 has a C-shaped cross-section with:

- a core 45 which faces and is in contact with the core 19 of the first bracket 18 and with the core 32 of the second bracket 31,

- two mirror-symmetrical wings 46a, 46b, each one provided with two or more seventh through holes 47, for the insertion of screws for fixing to corresponding diagonal elements 48 for mutually stabilizing two parallel grid-like structures 12, as shown in Figure 2.

In particular, each one of such wings 46a, 46b, of the post 14 has seventh holes 47, proximate to/at its longitudinal ends.

Advantageously, once the assembly 10 is fixed to the grid-like structure 12, the post 14 acts as a post of that grid-like structure 12.

The fixing assembly 10 is also provided with two tension members 49a, 49b which are mirror- symmetrical with respect to its sagittal plane of symmetry, each one extending between the plate 14 and a respective second appendage 50a, 50b of the second bracket 31, the latter protruding toward the outside of a respective wing of the second bracket 31.

Such tension members 49a, 49b have an axis of extension that is inclined with respect to the axis of extension of the post 14.

The use of the fixing assembly 10, according to the invention, is the following.

The assembly 10 is fixed to a grid-like structure 12, by associating:

- the first portion 13 with a first longitudinal member 51a of the gridlike structure 12, by means of screws inserted in the second holes 20,

- the second portion 15 with a second longitudinal member 51b of the grid-like structure 12, by means of screws inserted in the fourth holes 33.

Then a prop 11 is associated with the assembly 10:

- by inserting the upper plate 23 of the prop 11 into the seat defined by the flaps 22a, 22b, and locking the prop 11 by means of the insertion of the first pin 26 into the third holes 25a, 25b,

- by closing the jaw 35 around the prop 11 and locking the prop 11 by means of the insertion of the second pin 41 into the fifth holes 39 and corresponding sixth holes 40.

It should be noted that the insertion of the upper plate 23 of the prop 11 into the seat defined by the flaps 22a, 22b makes it possible to keep the prop 11 integral with the grid-like structure 12 while the form work is being lifted and shifted.

In this manner it is possible to speed up the use on-site of formwork panels, with respect to similar, conventional solutions.

With reference to Figures 7a to 13 c, an assembly for fixing a prop to a grid-like structure for the provision of floor slabs, according to the invention, in a second embodiment, is generally designated by the reference numeral 110.

The assembly 110 is used to connect a prop 111 to a respective gridlike structure 112 constituted by a truss.

In particular, the fixing assembly 110 comprises, in the following order:

- a first fixing portion 113 to be associated with the grid-like structure 112 and with the upper end of a prop 111,

- a post 114, extending between the first fixing portion 113 and a second fixing portion 115,

- such second fixing portion 115, arranged below the first fixing portion 113 to be associated with the prop 111 and with the grid-like structure 112, such second fixing portion 115 comprising means 116 for quick coupling to the prop 111. The first fixing portion 113 comprises:

- a plate 117, arranged on a plane that is at right angles to the axis of extension of the post 114 and provided with first through holes 121 for the insertion of fixing screws (not shown in the figures) at the upper end of the prop 111,

- a first bracket 118, arranged above the plate 117 to be associated with the grid-like structure 112, such first bracket 118 having a substantially C-shaped cross-section with:

- the core 119 of the C-shape arranged parallel to the axis of extension of the post 114 and such first bracket 118 being provided with a plurality of second holes 120 for the insertion of screws (not shown in the figures) for fixing to the grid-like structure 112,

- the wings 160a, 160b of the C-shape arranged at right angles to the core 119, and at least partially connected by a first bridge element 161, and provided with eighth through holes 162 for the insertion of screws (not shown in the figures) for fixing to the grid-like structure 112,

- two third brackets 163a, 163b which are mirror- symmetrical with respect to the sagittal plane of symmetry of the assembly 110, each one extending from a respective one of such wings 160a, 160b of the first bracket 118, at right angles to it, each one of such third brackets 163a, 163b having a substantially C-shaped cross-section with:

- the core 164 of the C-shape arranged on a plane that is at right angles to the axis of extension of the post 114, below the plate 117, and provided with a plurality of ninth holes 165 for inserting a tension member 149a, 149b,

- the wings 166a, 166b of the C-shape arranged at right angles to the core 164, on planes that are at right angles to the plane of arrangement of the plate 117, at least partially connected by a second bridge element 167 at the first bracket 118,

- two first appendages 124a, 124b, which are mirror- symmetrical with respect to the sagittal plane of symmetry of the fixing assembly 110, such first appendages 124a, 124b extending from the plate 117, below it and protruding from the third brackets 163a, 163b, and being each provided with a third through hole 125a, 125b for the insertion of a first pin 126.

The first bracket 118 is integral with and fixed to the post 114.

The two third brackets 163a, 163b define an insertion seat for the upper plate 123 of the prop 111.

In particular, with reference to Figure 7c, between the core 164 of the third brackets 163a, 163b and the plate 117, and inside the bulk defined by the two first appendages 124a, 124b, a recess/undercut S is provided which allows the insertion of the upper plate of the prop 111.

The first pin 126 has an L-shaped extension with a first core 129 and a first wing 130, and is provided with a first lug 128 which is arranged at right angles to the axis of extension of the first core 129 proximate to its free end.

Advantageously, at least one third hole 125b has an edge which is shaped so as to:

- allow the passage of the first core 129 with the first lug 128, when the latter is arranged in a preset position,

- produce an interference with the first lug 128, so preventing the removal of the first pin 126 from such third hole 125b, when the first lug 128 is arranged in a position other than the preset one.

The first lug 128 has an axis of extension that lies on a plane which is parallel to the plane of arrangement of the axis of extension of the first wing 130, and rotated with respect to it.

In this manner, after inserting the first core 129 with the first lug 128 into the third hole 125b, by virtue of the force of gravity, the first wing 130 is arranged vertically, below the first core 129, and consequently rotating the latter and shifting the first lug 128 so as to produce an interference between the first lug 128 and the edge of the third hole 125b.

The second fixing portion 115 comprises: - a second bracket 131 to be associated with the grid-like structure 112, such second bracket 131 having a substantially C-shaped cross-section with the core 132 of the C-shape arranged parallel to the axis of extension of the post 114 and being provided with a plurality of fourth through holes 133 for the insertion of screws (not shown in the figures) for fixing to the grid-like structure 112,

- the means 116 for quick coupling to the prop 111, constituted by a clamp provided with:

- a fixed part 134, extending monolithically with the second bracket 131,

- a jaw 135, which is hinged to the fixed part 134 and can move on a plane that is at right angles to the axis of extension of the post 114.

The jaw 135 has two parallel arc-like elements 136, which lie on planes that are at right angles to the axis of extension of the post 114, and which are at least partially shaped complementarily to the profile of the prop 111, and which have:

- a first end 137, coupled to the fixed part 134,

- a second end 138, having a fifth through hole 139,

- a first hollow 168, arranged in a substantially central position, adapted to allow form-fit coupling with some particular types of props 111, as shown in Figure 13a and 13b, in order to improve the fixing thereto and prevent their rotation.

Each fifth hole 139 is adapted to correspond to a respective sixth through hole 140, which is provided on the fixed part 134, for the insertion of a second pin 141.

The second pin 141 has an L-shaped extension with a second core 142 and a second wing 143, and is provided with a second lug 144 which is arranged at right angles to the axis of extension of the second core 142 proximate to its free end.

The second pin 141 also has a tenth through hole 169 proximate to the second lug 144 and to the free end of the second core 142, for the insertion of a stop element 170 adapted to prevent the extraction of the second pin 142 from at least one sixth hole 140.

Advantageously, each fifth hole 139 and each sixth hole 140 has an edge which is shaped so as to:

- allow the passage of the second core 142 with the second lug 144, when the latter is arranged in a preset position,

- produce an interference with the second lug 144, so preventing the removal of the second pin 141 from the fifth hole 139 and from the sixth hole 140 when the second lug 144 is arranged in a position other than the preset one.

The post 114 is fixed:

- at a first end, to the first fixing portion 113,

- at a second end, which is opposite to the preceding one, to the second fixing portion 115.

In particular, the post 114 has a quadrangular cross-section with:

- two parallel and mirror-symmetrical first sides 171a, 171b, one of which (the side 171a) is facing and in contact with the core 119 of the first bracket 118 and with the core 132 of the second bracket 131, the first sides 171a, 171b having a plurality of mutually corresponding eleventh holes 172a, 172b, for the insertion of screws (not shown in the figures) for fixing to the grid-like structure 112,

- two parallel and mirror- symmetrical second sides 173a, 173b interposed between the first sides 171a, 171b.

Advantageously, once the assembly 110 is fixed to the grid-like structure 112, the post 114 acts as a post of that grid-like structure 112.

The fixing assembly 110 furthermore has two tension members 149a, 149b, which are mirror- symmetrical with respect to its sagittal plane of symmetry, each one extending between a respective third bracket 163a, 163b and a corresponding wing 174a, 174b of the C-shape that constitutes the cross-section of the second bracket 131.

Such tension members 149a, 149b have an axis of extension that is inclined with respect to the axis of extension of the post 114.

One of the peculiarities of the fixing assembly 110 consists in that it comprises at least one transverse element 175, 176 for connection to one or more diagonal elements 148 for mutually stabilizing (wind-bracing) two parallel grid-like structures 112, as shown in Figures 11 and 12.

In the example shown in the figures, the fixing assembly 110 comprises:

- a first transverse element 175, proximate to/at the first fixing portion 113,

- a second transverse element 176, proximate to/at the second fixing portion 115.

In particular, the first transverse element 175 comprises two first elongated portions 177a, 177b, which are mirror-symmetrical with respect to the sagittal plane of symmetry of the assembly 110, which extend from the post 114 at right angles to it, and which are closed at the respective free ends by a perforated first plate 178a, 178b.

Such first plate 178a, 178b is adapted for the insertion of a screw 179 for fixing one or more diagonal elements 148.

Advantageously, the two first elongated portions 177a, 177b are monolithic.

The second transverse element 175 comprises two second elongated portions 180a, 180b, which are mirror-symmetrical with respect to the sagittal plane of symmetry of the assembly 110, which extend from the post 114 at right angles to it, and which are closed at the respective free ends by a perforated second plate 181a, 181b.

Such second plate 181a, 181b is adapted for the insertion of a screw 182 for fixing one or more diagonal elements 148.

Advantageously, the two second elongated portions 180a, 180b are monolithic.

The assembly 110 comprises a first angular element 183, with an L- shaped profile, arranged proximate to/at the first transverse element 175.

Such first angular element 183 has:

- a first side 184, associated with the post 114 at one of its first sides 171a,

- a second side 185, at right angles to the first side 184 and horizontal in the configuration for use, arranged below the plate 117, between the tension members 149a, 149b, such second side 185 having:

- a contoured second central hollow 186, adapted to allow form-fit coupling with some particular types of props 111, not shown in the figures, in order to improve the fixing thereto and prevent their rotation,

- one or more twelfth through holes 187, for the insertion of elements for fixing to some particular types of props 111, not shown in the figures.

The assembly 110 comprises a second angular element 188, with an L-shaped profile, arranged proximate to/at the second transverse element 176.

Such second angular element 188 has:

- a first side 189 associated with the core 132 of the second bracket 131,

- a second side 190, at right angles to the first side 189 and horizontal in the configuration for use, arranged parallel to the first side 184 of the first angular element 183 and below the second transverse element 176, such second side 190 having:

- a contoured third central hollow 191, adapted to allow form-fit coupling with some particular types of props 111, as shown in Figure 13b, in order to improve the fixing thereto and prevent their rotation,

- one or more thirteenth through holes 192, for the insertion of elements for fixing to some particular types of props 111, not shown in the figures. Advantageously, the first angular element 183 and the second angular element 188 have the same dimensions and the second angular element 188 is contained inside the bulk defined by the wings 174a, 174b of the C-shape that constitutes the cross-section of the second bracket 131.

The use of the fixing assembly 110, according to the invention, is the following.

The assembly 110 is fixed to a grid-like structure 112, by associating:

- the first portion 113 with a first longitudinal member 151a of the grid-like structure 112, by means of screws inserted in the second holes 120,

- the second portion 115 with a second longitudinal member 151b of the grid-like structure 112, by means of screws inserted in the fourth holes 133.

Then a prop 111 is associated with the assembly 110:

- by inserting the upper plate 123 of the prop 111 into the seat defined by the two third brackets 163a, 163b, and by the recess/undercut S, and locking the prop 111 by means of the insertion of the first pin 126 into the third holes 125a, 125b,

- by closing the jaw 135 around the prop 111 and locking the prop 111 by means of the insertion of the second pin 141 into the fifth holes 139 and corresponding sixth holes 140.

With reference to Figures 13a to 13c, it should be noted that the second portion 115 of the assembly 110 allows coupling and fixing to various types of prop 111 available on the market, which have different cross-sections.

Optionally it is possible to further stabilize the grid-like structure 112 by fixing diagonal elements 148 to the cross-members 175, 176.

It should be noted that the insertion of the upper plate 123 of the prop 111 into the seat defined by the two third brackets 163a, 163b, and by the recess/undercut S, makes it possible to keep the prop 111 integral with the grid-like structure 112 while the form work is being lifted and shifted. In this manner it is possible to speed up the use on-site of formwork panels, with respect to similar, conventional solutions.

In practice it has been found that the invention fully achieves the intended aim and objects by providing an assembly for fixing a prop to a grid-like structure for the provision of floor slabs that enables construction of formwork that is easier and quicker with respect to what occurs in the prior art.

With the invention an assembly has been devised for fixing a prop to a grid-like structure for the provision of floor slabs that necessitates a limited number of bolts and in any case fewer than are used in similar solutions in the prior art.

Also, with the invention an assembly has been provided for fixing a prop to a grid-like structure for the provision of floor slabs that allows the fully assembled formwork to be lifted and shifted, in order to speed up its use on the site.

The invention, thus conceived, is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims. Moreover, all the details may be substituted by other, technically equivalent elements.

In practice the materials employed, provided they are compatible with the specific use, and the contingent dimensions and shapes, may be any according to requirements and to the state of the art.

The content of Italian patent applications no. 102023000020466 and no. 102024000020755 from which this application claims priority is incorporated herein by reference.

Where technical features mentioned in any claim are followed by reference signs, such reference signs have been inserted for the sole purpose of increasing the intelligibility of the claims and accordingly such reference signs do not have any limiting effect on the interpretation of each element identified by way of example by such reference signs.

Claims

1. An assembly (10, 110) for fixing a prop (11 , 111) to a grid-like structure (12, 112) for the provision of floor slabs, said assembly (10, 110) being characterized in that it comprises in the following order:

- a first fixing portion (13, 113) to be associated with said grid-like structure (12, 112) and with the upper end of said prop (11, 111),

- a post (14, 114), extending between said first fixing portion (13, 113) and a second fixing portion (15, 115),

- said second fixing portion (15, 115), arranged below said first fixing portion (13, 113) to be associated with said prop (11, 111) and with said grid-like structure (12, 112), said second fixing portion (15, 115) comprising means (16, 116) for quick coupling to said prop (11, 111).

2. The assembly (10, 110) according to claim 1, characterized in that said second fixing portion (15, 115) comprises:

- a second bracket (31, 131), having a substantially C-shaped crosssection with the core (32, 132) of the C-shape arranged parallel to the axis of extension of said post (14, 114) and provided with a plurality of fourth through holes (33, 133),

- said means (16, 116) for quick coupling to said prop (11, 111), constituted by a clamp provided with:

- a fixed part (34, 134), extending monolithically with said second bracket (31, 131),

- a jaw (35, 135), which is hinged to said fixed part (34, 134) and ismovable on a plane that is at right angles to the axis of extension of said post (14, 114).

3. The assembly (10, 110) according to claim 2, characterized in that said jaw (35, 135) has two parallel arc-like elements (36, 136), which lie on planes that are at right angles to the axis of extension of said post (14, 114), said arc-like elements (36, 136) being at least partially shaped complementarily to the profile of said prop (11, 111), said arc-like elements (36, 136) having:

- a first end (37, 137), coupled to said fixed part (34, 134),

- a second end (38, 138), provided with a fifth through hole (39, 139), said fifth hole (39, 139) being adapted to correspond to a respective sixth through hole (40, 140) which is provided on said fixed part (34, 134) for the insertion of a second pin (41, 141).

4. The assembly (10, 110) according to one or more of the preceding claims, characterized in that it comprises said second pin (41, 141), said second pin (41, 141) having an L-shaped extension with a second core (42, 142) and a second wing (43, 143), said second pin (41, 141) being provided with a second lug (44, 144) which is arranged at right angles to the axis of extension of said second core (42, 142) proximate to its free end, said fifth hole (39, 139) and said sixth hole (40, 140) having an edge which is shaped so as to:

- allow the passage of said second core (42, 142) with said second lug (44, 144), when the latter is arranged in a preset position,

- produce an interference with said second lug (44, 144), so preventing the removal of said second pin (41, 141) from said fifth hole (39, 139) and from said sixth hole (40, 140) when said second lug (44, 144) is arranged in a position other than the preset one.

5. The assembly (10) according to one or more of the preceding claims, characterized in that said first fixing portion (13) comprises:

- a plate (17), arranged on a plane that is at right angles to the axis of extension of said post (14) and provided with first through holes (21),

- a first bracket (18), arranged above said plate (17), having a substantially C-shaped cross-section with the core (19) of the C-shape arranged parallel to the axis of extension of said post (14) and provided with a plurality of second holes (20),

- two flaps (22a, 22b), which are mirror-symmetrical with respect to the sagittal plane of symmetry of said fixing assembly (10), said flaps having an L-shaped cross-section, said flaps (22a, 22b) extending from said plate (17), below it, said flaps (22a, 22b) defining an insertion seat for the upper plate (23) of said prop (11),

- two first appendages (24a, 24b), which are mirror- symmetrical with respect to the sagittal plane of symmetry of said fixing assembly (10), said first appendages (24a, 24b) extending from said plate (17), below it, said first appendages (24a, 24b) being each provided with a third through hole (25a, 25b) for the insertion of a first pin (26).

6. The assembly (10) according to one or more of the preceding claims, characterized in that said first portion (13) comprises a raised portion/pin (27), which extends from said plate (17), at right angles to it and below it, said raised portion/pin (27) having an axis of extension that lies substantially on said sagittal plane of symmetry of said fixing assembly (10).

7. The assembly (10) according to one or more of the preceding claims, characterized in that said first pin (26) has an L-shaped extension with a first core (29) and a first wing (30), and is provided with a first lug (28), said first lug (28) being arranged at right angles to the axis of extension of said first core (29) proximate to its free end, said at least one third hole (25b) having an edge which is shaped so as to:

- allow the passage of said first core (29) with said first lug (28), when the latter is arranged in a preset position,

- produce an interference with said first lug (28), when said first lug (28) is arranged in a position other than the preset one.

8. The assembly (10) according to one or more of the preceding claims, characterized in that said post (14) is fixed:

- at a first end, to said first fixing portion (13),

- at a second end, which is opposite to the preceding one, to said second fixing portion (15), said post (14) having a C-shaped cross-section with: - a core (45) which faces and is in contact with said core (19) of said first bracket (18) and with said core (32) of said second bracket (31),

- two mirror-symmetrical wings (46a, 46b), each one provided with two or more seventh through holes (47).

9. The assembly (110) according to one or more of claims 1 to 4, characterized in that it comprises at least one transverse element (175, 176) for connection to one or more diagonal elements (148).

10. The assembly (110) according to claim 9, characterized in that said first fixing portion (113) comprises:

- a plate (117), arranged on a plane that is at right angles to the axis of extension of said post (114), said plate (117) being provided with first through holes (121),

- a first bracket (118), which is arranged above said plate (117), said first bracket (118) having a substantially C-shaped cross section with:

- the core (119) of said C-shape arranged parallel to the axis of extension of said post (114) and provided with a plurality of second holes (120),

- the wings (160a, 160b) of said C-shape arranged at right angles to said core (119), at least partially connected by a first bridge element (161), and provided with eighth holes (162),

- two third brackets (163a, 163b) which are mirror- symmetrical with respect to the sagittal plane of symmetry of said assembly (110), each one of said third brackets (163a, 163b) extending from a respective one of said wings (160a, 160b) of said first bracket (118), at right angles to it, said third brackets (163a, 163b) each having a substantially C-shaped cross-section with:

- the core (164) of the C-shape arranged on a plane that is at right angles to the axis of extension of said post (114), below said plate (117), and provided with a plurality of ninth holes (165),

- the wings (166a, 166b) of the C-shape arranged at right angles to said core (164), on planes that are at right angles to the plane of arrangement of said plate (117), at least partially connected by a second bridge element (167) at said first bracket (118),

- two first appendages (124a, 124b), which are mirror-symmetrical with respect to the sagittal plane of symmetry of said fixing assembly (110), said first appendages (124a, 124b) extending from said plate (117), below it, and protruding with respect to said third brackets (163a, 163b), said first appendages (124a, 124b) being each provided with a third through hole (125a, 125b) for the insertion of a first pin (126).

11. The assembly (110) according to claim 10, characterized in that said first bracket (118) is integral with and fixed to said post (114), said two third brackets (163a, 163b) defining an insertion seat for an upper plate (123) of said prop (111), between said core (164) of said third brackets (163a, 163b) and said plate (117) and inside the bulk defined by said two first appendages (124a, 124b) there being a recess/undercut (S).

12. The assembly (110) according to one or more of the preceding claims, characterized in that it comprises said first pin (126), said first pin (126) having an L-shaped extension with a first core (129) and a first wing (130), said first pin (126) being provided with a first lug (128) which is arranged at right angles to the axis of extension of said first core (129) proximate to its free end, at least one third hole (125b) having an edge which is shaped so as to:

- allow the passage of said first core (129) with said first lug (128), when the latter is arranged in a preset position,

- produce an interference with said first lug (128), so preventing the removal of said first pin (126) from said at least one third hole (125b) when said first lug (128) is arranged in a position other than the preset one, said first lug (128) having an axis of extension that lies on a plane which is parallel to the plane of arrangement of the axis of extension of said first wing (130) and rotated with respect to it.

13. The assembly (110) according to one or more of the preceding claims, characterized in that said post (114) has a quadrangular crosssection with:

- two parallel and mirror- symmetrical first sides (171a, 171b), one of which (171a) is facing and in contact with said core (119) of said first bracket (118) and with said core (132) of said second bracket (131), said first sides (171a, 171b) having a plurality of mutually corresponding eleventh holes (172a, 172b),

- two parallel and mirror- symmetrical second sides (173a, 173b) interposed between said first sides (171a, 171b).

14. The assembly (110) according to one or more of the preceding claims, characterized in that it comprises:

- a first transverse element (175), proximate to/at said first fixing portion (113),

- a second transverse element (176), proximate to/at said second fixing portion (115).

15. The assembly (110) according to one or more of the preceding claims, characterized in that it comprises a first angular element (183), with an L-shaped profile, arranged proximate to/at said first transverse element (175), said first angular element (183) having:

- a first side (184), associated with said post (114) at one of said first sides (171a) of said post (114),

- a second side (185), at right angles to said first side (184) and horizontal in the configuration for use, said second side (185) being arranged below said plate (117) between said tension members (149a, 149b), said second side (185) having:

- a contoured central second hollow (186),

- one or more twelfth through holes (187).

16. The assembly (110) according to one or more of the preceding claims, characterized in that it comprises a second angular element (188), with an L-shaped profile, arranged proximate to/at said second transverse element (176), said second angular element (188) having:

- a first side (189) associated with said core (132) of said second bracket (131), - a second side (190), at right angles to said first side (189) and horizontal in the configuration for use, said second side (190) being arranged parallel to said first side (184) of said first angular element (183) and below said second transverse element (176), said second side (190) having: - a contoured central third hollow (191),

- one or more thirteenth through holes (192).

17. The assembly (110) according to one or more of the preceding claims, characterized in that said arc-like elements (136) have a first hollow (168), arranged in a substantially central position.

18. The assembly (10, 110) according to one or more of the preceding claims, characterized in that it has two tension members (49a, 49b, 149a, 149b) which are mirror- symmetrical with respect to said sagittal plane of symmetry.