FR2751012A1 - Support for facing panels for buildings - Google Patents

Abstract

The support has a frame (1) with square hooks (10) each having a plate (11) for fixing to the frame, a first wing (12) for fixing of a first facing and a second wing (13) for a second facing. The wings (12,13) are perpendicular to the panel. The second wing is positioned on the lower face of the first wing, parallel to it and defining, with the first wing, an unhooking section. The fixing plate can be formed by a foot (110) disposed on one of the side edges of the first wing. The foot can have an extension oriented upwardly.

Description

 The present invention relates to a device for supporting cladding cassettes on a frame of a building and a cladding cassette fixed by this support device.

 The present invention also relates to a method of installing cladding cassettes directly on a frame of a facade of a building.

 Some buildings, such as industrial or tertiary buildings, have a main frame formed in particular of concrete walls or beams or profiles, on which are fixed elements or cladding cassettes forming a covering of the main frame.

 These cladding cassettes which are formed by narrow panels, are positioned on the main frame of the building next to each other and are each formed by a covering plate provided at its lateral edges with cooperating hook returns. with fixing members provided on said main frame.

 However, the main frame generally has verticality defects which obviously have repercussions on the cladding cassettes if these are fixed directly to the main frame.

 To this end, a secondary frame is interposed between the main frame and the cladding cassettes to compensate for the flatness defects of this main frame and any alignment defects of the uprights of said main frame.

 This secondary framework is generally made up of horizontally and vertically adjustable spacers and means for hooking cladding cassettes.

 The spacers intended to be fixed on the main framework are most often constituted by heddles making it possible to compensate for positioning faults and the spacers intended to receive the means for attaching the cladding cassettes are constituted by adjustable supports fixed on the corresponding smooth and making it possible to compensate for flatness defects.

 But, when the cladding cassettes have too large dimensional deviations, their attachment causes a bulge detrimental to the aesthetics of the facade.

 In practice, before installing the cladding cassettes, it is therefore necessary with this fixing device to provide a secondary framework adjusted vertically in two orthogonal horizontal directions and a support comprising lugs mounted vertically sliding to adapt to the position of the cassettes cladding and possibly their dimensional defects.

 However, the drawback of this device for fixing cladding cassettes to a facade of a building lies above all in its complexity and in the number of parts required.

 The object of the invention is to avoid these drawbacks by proposing a device for supporting cladding cassettes which is simple to implement and which makes it possible to fix the cladding cassettes directly to the framework of the building and consequently to reduce the assembly time. , while offering the possibility of making up for the dimensional defects of said cladding cassettes and of correctly adjusting the alignments thereof.

 The invention therefore relates to a device for supporting cladding cassettes on a frame of a building, characterized in that it comprises hooking pieces in the form of a square each comprising a fixing plate on the frame. , a first wing for fixing a first cladding cassette and a second wing for fixing a second cladding cassette juxtaposed with the first cladding cassette, said wings being perpendicular to the plate and said second wing being arranged on the edge lower of the first wing, parallel to the latter and providing with said first wing a recess.

According to other features of the invention
- the fixing plate on the frame is formed by a tab disposed on one of the lateral edges of the first wing,
- the tab has an extension extending upwards,
- the fixing plate on the frame is formed by a first tab disposed on one of the side edges of the first wing and by a second tab disposed on one of the side edges of the second wing and below the first leg,
the fixing plate on the frame is formed by two tabs arranged on one of the lateral edges of the first wing and on either side of said first wing,
- one of the legs has an extension extending upwards,
- the recess between the first and second wings of the square-shaped attachment piece extends in a direction opposite to the direction of mounting of the cladding cassettes,
- the width of the offset corresponds to the spacing to be obtained between two cladding cassettes juxtaposed horizontally.

 The invention also relates to a cladding cassette, characterized in that it is formed by a covering plate comprising, on the one hand, on at least the upper part of its lateral edges with fixing returns and, d 'on the other hand, on its lower and upper edges of the securing returns with the adjacent cladding cassettes, lower and upper.

According to other features of the invention
- one of the fixing returns has an upwardly extending extension at its upper part,
- Each fixing return has at its upper part an extension extending upwards.

The invention also relates to a method of installing cladding cassettes directly on a frame of a facade of a building, characterized in that it consists
- to place and position on the lower part of the framework, at least one support piece forming a horizontal reference element,
- to place and position a vertical reference element on the left edge of the building facade,
placing a first cladding cassette on said support piece in such a way that the lower return for securing said first cladding cassette rests on said support piece,
to fix the first cladding cassette to said vertical reference element by means of the left fixing return,
- to position a hanging piece on the upper part of the right fixing return,
- to fix said attachment piece to the framework by means of the fixing plate,
- to fix on the second wing of said attachment piece the right fixing return of the first cladding cassette,
- to lay and fix in the same way and successively cladding cassettes and hanging pieces over the entire height of the building to form a first vertical row of cladding cassettes,
placing a cladding cassette juxtaposed on the right of the first cladding cassette of the first vertical row on said support piece, so that the lower return for securing said cladding cassette rests on said support piece,
- to be fixed on the first wing of the attachment piece previously placed, said cladding cassette by means of the left fixing return,
- to position a hanging piece on the upper part of the right fixing return,
- to fix said attachment piece to the framework by means of the fixing plate,
- to be fixed on the second wing of this right attachment piece, the right fixing return of said cladding cassette,
- to install and fix in the same way and successively cladding cassettes and hanging pieces over the entire height of the building to form a second vertical row of cladding cassettes,
- And to install and successively attach cladding cassettes and attachment pieces to form over the entire height of the building vertical and adjacent rows of cladding cassettes and this over the entire length of said building.

The subject of the invention is also a method of installing cladding cassettes directly on a frame of a building facade, characterized in that it consists
- to place and position on the lower part of the framework, at least one support piece forming a horizontal reference element,
- placing and positioning a vertical reference element on the right edge of the facade of the building,
placing a first cladding cassette on said support piece in such a way that the lower return for securing said first cladding cassette rests on said support piece,
- fixing the first cladding cassette to said vertical reference element by means of the right fixing return,
- to position a hanging piece on the upper part of the left fixing return,
- to fix said attachment piece to the framework by means of the fixing plate,
- to fix on the second wing of said attachment plate the left fixing return of the first cladding cassette,
- to lay and fix in the same way and successively cladding cassettes and hanging pieces over the entire height of the building to form a first vertical row of cladding cassettes,
placing a cladding cassette juxtaposed to the left of the first cladding cassette of the first vertical row on said support piece so that the lower return for securing said cladding cassette rests on said support piece,
- to be fixed on the first wing of the right attachment piece previously laid on said cladding cassette by means of the right fixing return,
- place a hanging piece on the upper part of the left fixing return,
- to fix said attachment piece to the framework by means of the fixing plate,
- to fix on the second wing of this left hooking piece the left fixing return of said cladding cassette,
- to install and fix in the same way and successively cladding cassettes and hanging pieces over the entire height of the building to form a second vertical row of cladding cassettes,
- And to install and successively attach cladding cassettes and attachment pieces to form over the entire height of the building vertical and adjacent rows of cladding cassettes and this over the entire length of the building.

Other characteristics and advantages of the invention will become apparent during the description which follows, given with reference to the appended drawings, in which
- Fig. 1 is a schematic perspective view of part of a facade of a building partially covered with cladding cassettes fixed to said facade by a support device according to the invention,
- Fig. 2 is a perspective view of a cladding cassette,
- Fig. 3A to 3E are perspective views showing different embodiments of the attachment pieces of the cladding cassettes,
- Figs. 4A to 4C are schematic elevation views showing different embodiments of the returns of securing the cladding cassettes between it,
- Figs. 5 to 7 are schematic perspective views showing the different stages of fixing the cladding cassettes with the support device according to the invention.

 In Fig. 1, there is shown schematically a part of a facade of a building, such as for example an industrial or tertiary building, which comprises a main framework 1 formed of concrete walls or a network of metal or wooden beams or profiles.

In the embodiment shown in
Fig. 1, the main framework 1 is formed by a concrete wall.

 This main frame 1 is intended to be covered with cladding cassettes 2 fixed on said frame 1 and arranged one next to the other to form a covering for the building.

 As shown in Fig. 2, each cladding cassette 2 is formed by a narrow panel which comprises a covering plate 3 of rectangular or square shape and provided, on the one hand, on at least the upper part of its lateral edges with fixing returns, respectively 4a and 4b and, on the other hand, on its lower and upper edges, of joining returns, respectively 5a and 5b, with the adjacent cladding cassettes 2, lower and upper, as will be seen later.

 One of the fixing returns of each cladding cassette 2, such as for example the fixing return 4a has, at its upper part, an extension 4c extending upwards.

 According to a variant, each fixing return 4 and 4b has at its upper part an extension 4c extending upwards.

 The cladding cassettes 2 are intended to be fixed to the main framework 1 by means of hooking pieces 10 in the form of a square.

 As shown in Figs. 3A to 3E, each hooking piece 10 in the form of a square comprises an island plate for fixing to the frame 1, a first wing 12 for fixing a cladding cassette 2 and extending perpendicular to the plate 11 and a second wing 13 for fixing another cladding cassette 2 juxtaposed horizontally with the first cladding cassette 2. The second wing 13 extends perpendicularly to the plate 11.

 The second wing 13 is arranged on the lower edge of the first wing 12, parallel to it and provides a recess 14 with said first wing 12.

 According to a first embodiment shown in FIG. 3A, the plate 11 for fixing to the frame 1 is formed by a tab 110 disposed on one of the lateral edges of the first wing 12.

 According to a second embodiment shown in FIG. 3B, the tab 110 has an extension 110a extending upwards.

 According to a third embodiment shown in FIG. 3C, the plate 11 for fixing to the frame 1 is formed by a first tab 111 disposed on one of the side edges of the first wing 12 and by a second tab 112 disposed on one of the side edges of the second wing 13 and below the first leg 111.

 According to a fourth embodiment shown in FIG. 3D, the plate 11 for fixing to the frame 1 is formed by two tabs 113 and 114 arranged on one of the lateral edges of the first wing 12 and on either side of said first wing 12.

 According to a fifth embodiment shown in FIG. 3E, one of the legs 113 or 114 has an extension 114a extending upwards.

 As shown in Fig. 3E, the extension 114a is arranged on the tab 114.

 The recess 14 between the first and second wings 12 and 13 of the attachment piece 10 extends in a direction opposite to the direction of mounting of the cladding cassettes 2.

 Thus, when the cladding cassettes 2 are mounted on the facade 1 from the left to the right, the recess 14 extends to the left of the first wing 12 and when the cladding cassettes 2 are mounted on the facade 1 from the right to the left, the recess 14 extends to the right of the first wing 12.

 The first wing 12 of the attachment piece 10 is intended to receive an attachment return 4a or 4b of a cladding cassette 2 and the second wing 12 of said attachment piece 10 is intended to receive a return of hooking 4a or 4b of another cladding cassette 2.

 In Figs. 4A to 4C, there are shown diagrammatically several embodiments of the joining returns 5a and 5b of the cladding cassettes 2.

 According to a first embodiment shown in FIG. 4A, the upper 5a and lower 5b securing returns of each cladding cassette 2 each have the shape of a Z so that, when the cladding cassettes 2 are mounted on the frame 1, the lower securing return 5b of each cladding cassette 2 fits onto the upper securing return 5a of the cladding cassette 2 located below.

 According to a second embodiment shown in FIG. 4B, the upper 5a and lower 5b securing returns of each cladding cassette 2 each have the shape of an L, extending downwards for the lower securing return 5b and extending upwards for the return of upper securing 5a.

When mounting the cladding cassettes 2 on the frame 1, the vertical branch 6b of the lower securing return 5b of the upper cladding cassette 2 is applied to the vertical branch 6a of the upper securing return 5a of the cassette cladding 2 lower, as shown in
Fig. 4B.

 The vertical branches 6a and 6b are interconnected by suitable means, such as for example by rivets 7.

 According to a third embodiment shown in FIG. 4C, the lower securing return 5b of each cladding cassette 2 is constituted by a folded edge comprising two parallel folds, respectively 8b and 9b, which form two longitudinal gutters, respectively 8c and 9c, an gutter 8c directed upwards and a gutter 9c directed downwards.

 In this embodiment, the upper securing return 5a of each cladding cassette 2 has the shape of an L comprising a vertical branch 15a extending upwards.

When mounting the cladding cassettes 2 on the frame 1, the vertical branch 15a of the lower cladding cassette 2 is fitted into the gutter 9c of the lower securing return 5b of the upper cladding cassette 2, as shown in the
Fig. 4c.

 A seal 16 is, in this case, disposed in the gutter 8c.

 Referring now to Figs. 5 to 7, we will describe the different stages of mounting the cladding cassettes 2 on the frame 1 of the building.

 First of all, at least one support piece 20 is placed and positioned on the lower part of the framework 1, the essential function of which is to serve as a horizontal reference element when installing the cladding cassettes 2.

 This support piece 20 can be formed of a single element extending over the entire length of the facade of the building or by several independent and juxtaposed elements.

 The support piece 20 has a profile substantially identical to the profile of the cladding cassettes 2 and is fixed and positioned on the main frame 1 by means of fixing members, not shown, constituted for example by simple brackets or by pieces hook 10 in the form of a square.

 Each support piece 20 comprises, as shown in FIG. 5, securing returns, respectively 20a and 20b, for example having a profile identical to the profile of the securing returns 5a and 5b of the cladding cassettes 2.

 In FIG. 5, the cladding cassettes 2 have been shown in dotted lines so as to be able to show the hooking pieces 10 in the form of a square.

 At this stage, two methods of mounting the cladding cassettes 2 are possible, the first consisting in mounting these cladding cassettes on the facade of the building from left to right and the second consisting in mounting said cladding cassettes 2 on this facade from right to left.

 Referring to Figures 5 to 7, we will describe the mounting method of the cassettes 2 from left to right.

 First of all, a vertical reference element 30 is formed and positioned on the left edge of the facade of the building, for example by an L-shaped beam.

 After the installation of this vertical reference element 30, a first cladding cassette 2 is placed on the support piece 20 so that the lower securing return 5b of said first cladding cassette 2 rests on said support piece 20.

 The cladding cassettes 2 used in this mounting method have an extension 4c at the top of the left fixing return 4a.

 The first cladding cassette 2 is fixed on the element 30 by means of this extension 4c of the left fixing return 4a by means, for example, of self-drilling screws 17.

 Then, a hooking piece 10 is positioned on the upper edge of the right fixing return 4b and this hooking piece 10 is fixed to the framework 1 by means of the fixing plate 11 and for example of screws, not shown.

 The right fixing return 4b of the first cladding cassette 2 is fixed to the second wing 13 of said attachment piece 10 by means of, for example, self-drilling screws 17.

 The verticality of this cladding cassette 2 is adjusted when the said cladding cassette 2 is fixed to the attachment piece 10.

 After installing the first cladding cassette 2, a second cladding cassette 2 is placed on this first cladding cassette 2 so that the lower securing return 5b of said second cladding cassette 2 is supported on the return of securing 5a of the first cladding cassette 2.

 The second cladding cassette 2 is fixed on the vertical reference element 2 by means of the extension 4c of the left fixing return 4a.

 Is positioned on the upper edge of the right fixing return 4b, the recess 14 of a second attachment piece 10 and is fixed, for example by means of screws not shown, on the frame 1 said attachment piece 10 by via the fixing plate 11.

 The fixing return 4b of the second cladding cassette 2 is then fixed on the second wing 13 of the corresponding hooking piece 10.

 The same is done for the other cladding cassettes 2, by successively placing cladding cassettes 2 and hanging pieces 10 over the entire height of the building to form a first vertical row A of cladding cassettes.

 Following the installation of the first vertical row A of cladding cassettes 2, a cladding cassette 2 is placed on the support piece 20 juxtaposed to the right of the first cladding cassette 2 of the first vertical row A of such so that the lower securing return 5b of said cladding cassette 2 rests on said support piece 20.

 Is fixed, for example by means of self-drilling screws 17, on the first wing 12 of the left hooking piece 10 previously placed said cladding cassette 2 via the extension 4c of the left fixing return and positioned on the edge upper part of the right fixing return 4b, the recess 14 of another attachment piece 10.

 By means of self-drilling screws 17, said attachment part 10 is fixed to the framework 1 by means of the fixing plate 11 and, on the second wing 13 of this attachment part 10, is fixed, the right fixing return 4b of said cladding cassette 2.

 The cladding cassettes 2 and the hooking pieces 10 are placed and fixed in the same way and successively over the entire height of the building to form a second vertical row B of cladding cassettes 2.

 We proceed in the same way by successively placing and fixing cladding cassettes 2 and the hanging pieces 10 to form over the entire height of the building vertical and adjacent rows of cladding cassettes 2 and this over the entire length of the building. .

 In the case where the cladding cassettes 2 are mounted on the frame 1 of the building facade is carried out from right to left, these cladding cassettes 2 have an extension 4c extending upwards on the return side of fixing 4b.

 In this case, the recess 14 of the attachment pieces 10 extends from the left to the right when this attachment piece 10 is fixed to the frame 1.

 The installation of cladding cassettes 2 is carried out as follows.

 First of all and as before, at least one support piece 20 is placed and positioned on the lower part of the framework 1 forming a horizontal reference element and an element 30 is positioned on the right edge of the facade of the building vertical reference formed for example by a smooth L-shaped section.

 Then, a first cladding cassette 2 is placed on said support piece 20 so that the lower securing return 5b of said first cladding cassette 2 is supported on the support 20 and the first is fixed to the element 30 cladding cassette 2 via the extension 4c of the right fixing return 4b.

 Is positioned on the upper edge of the left fixing return 4a of said first cladding cassette 2, the recess 14 of a hooking piece 10 and is fixed, for example by means of screws not shown, on the frame 1 said attachment piece 10 via the fixing plate 11.

 Then, the left fixing return 4a of the first cladding cassette 2 is fixed on the second wing 13 of this attachment piece 10.

 Cladding cassettes 2 and attachment pieces 10 are placed and fixed in the same way and successively over the entire height of the building to form a first vertical row A of cladding cassettes 2.

 After mounting this first vertical row A of cladding cassettes 2, a cladding cassette 2 juxtaposed to the left of the first cladding cassette 2 of the first vertical row A is placed on the support piece 20 so that the return lower attachment 5b of said cladding cassette 2 is supported on said support piece 20.

 Is fixed, on the first wing 12 of the right attachment piece 10 previously installed, said cladding cassette 2 by means of the extension 4c of the right fixing return 4b and is positioned on the upper edge of the left fixing return 4a the recess 14 of another attachment piece 10, then one fixes, for example by means of screws not shown, on the frame 1 said attachment piece 10 by means of the fixing plate 11.

 Finally, on the second wing 13 of this left attachment piece 10, the fixing return 4a of said cladding cassette 2 is fixed.

 We proceed in the same way by placing and successively fixing cladding cassettes 2 and hooking pieces 10 to form a second vertical row B of cladding cassettes 2 and successively placing cladding cassettes 2 and pieces of hanging 10 to form over the entire height of the building vertical and adjacent rows of cladding cassettes 2 and this over the entire length of the building.

 The recess 14 of the attachment pieces 10 makes it possible to slide this attachment piece 10 on the upper edge of one of the corresponding fixing returns 4a or 4b, which facilitates the positioning of the attachment piece 10 relative to the frame 1 before its final fixing on this frame 1.

 In the case where each cladding cassette 2 has an extension 4c on the two fixing returns 4a and 4b, the mounting of these cassettes 2 can also be carried out on the frame 1 from left to right or from right to left.

 In this case, the extensions 4c are fixed on the faces of the corresponding wings 12 or 13 of the attachment pieces 10.

 The width of the recess 14 of each attachment piece 10 makes it possible to compensate for the thickness of the corresponding fixing return and the thickness of the head of the self-drilling screw 17 intended to fix this fixing return.

 This width of the recess 14 of each attachment piece 10 may be greater or less depending on the disposition to obtain cladding cassettes 2 on the frame 1 of the building.

 In fact, in certain applications, seals and joint covers are interposed between the lateral edges of the adjacent cladding cassettes 2 and in this case the width of the recess 14 of each attachment piece 10 is greater.

 Furthermore, the cladding cassettes and the hanging pieces can also be mounted horizontal row by horizontal row and this over the entire height of the building.

 Given the small depth of the cladding cassettes, the configuration of the support pieces in the form of a square has the advantage of being able to fix the fixing returns of these cladding cassettes to the corresponding wings of the hooking parts without having to insert the screwing tool between the covering plate of these cladding elements and the frame of the building, which facilitates the mounting of these cladding cassettes.

 In addition, the fixing on the facade of the building of each cladding cassette is completely independent of the upper and lower cassettes which allows and allow the assembly of cladding cassettes by a single person which is economically very advantageous.

 On the other hand, it offers, taking into account the numerous possible adjustments, the possibility of catching up with the dimensional variations of the cladding cassettes and of correctly adjusting the alignment thereof.

 Finally, by its design, the support device according to the invention makes it possible to avoid successive ascents and descents on the scaffolding since the attachment pieces and the cladding cassettes are mounted in successive rows, for example from the bottom to the top of the building, so that only one ascent on the scaffolding is necessary.

Claims (13)

 1. Device for supporting cladding cassettes (2) on a frame (1) of a building, characterized in that it comprises hooking parts (10) in the form of a square each comprising a plate (11) for fixing to the frame (1), a first wing (12) for fixing a first cladding cassette (2) and a second wing (13) for fixing a second cladding cassette (2) juxtaposed with the first cladding cassette (2), said wings (12, 13) being perpendicular to the plate (11) and said second wing (13) being arranged on the lower edge of the first wing (12), parallel to the latter and providing with said first wing (12) a step (14).  2. Device according to claim 1, characterized in that the plate (11) for fixing to the frame (1) is formed by a tab (110) disposed on one of the side edges of the first wing (12).  3. Device according to claim 2, characterized in that the tab (110) has an extension (110a) extending upwards.  4. Device according to claim 1, characterized in that the plate (11) for fixing to the frame (1) is formed by a first tab (111) disposed on one of the side edges of the first wing (12) and by a second tab (112) disposed on one of the lateral edges of the second wing (13) and below the first tab (111).  5. Device according to claim 1, characterized in that the plate (11) for fixing to the frame (1) is formed by two tabs (113, 114) disposed on one of the side edges of the first wing (12 ) and on either side of said first wing (12).  6. Device according to claim 5, characterized in that one of the legs (113, 114) has an extension (114a) extending upwards.  7. Device according to claim 1, characterized in that the recess (14) between the first and second wings (12, 13) of the hooking piece (10) in the form of a square extends in a direction opposite to the direction of assembly of the cladding cassettes (2).  8. Device according to claims 1 and 7, characterized in that the width of the recess (14) corresponds to the spacing to be obtained between two cladding cassettes (2) juxtaposed horizontally.  9. Cladding cassette, characterized in that it is formed by a covering plate (3) comprising, on the one hand, on at least the upper part of its lateral edges of the fixing returns (4a, 4b) and , on the other hand, on its lower and upper edges, securing returns (5a, 5b) with the cladding cassettes (2) adjacent, lower and upper.  10. Cladding cassette according to claim 9, characterized in that one (4a) of the fixing returns has at its upper part an extension (4c) extending upwards.  11. Cladding cassette according to claim 9, characterized in that each fixing return (4a, 4b) has at its upper part an extension (4c) extending upwards.  12. Method for installing cladding cassettes (2) directly on a frame (1) of a building facade, characterized in that it consists  - to be placed and positioned on the lower part of the framework (1), at least one support piece (20) forming a horizontal reference element,  - placing and positioning a vertical reference element (30) on the left edge of the building facade,  - placing on said support piece (20) a first cladding cassette (2) so that the lower securing return (5b) of said first cladding cassette (2) rests on said support piece (20 ),  - to fix on said element (30) the first cladding cassette (2) by means of the left fixing return (4a),  - to position on the upper part of the right fixing return (4b), a hooking piece (in),  - to fix on the frame (1) said attachment piece (10) by means of the fixing plate (11),  - to fix on the second wing (13) of said attachment piece (10) the right fixing return (4b) of the first cladding cassette (2),  - to lay and fix in the same way and successively cladding cassettes (2) and hanging pieces (10) over the entire height of the building to form a first vertical row A of cladding cassettes (2),  - placing on said support piece (20) a cladding cassette (2) juxtaposed to the right of the first cladding cassette (2) of the first vertical row A so that the lower securing return (5b) of said cladding cassette (2) rests on said support piece (20),  - to be fixed on the first wing (12) of the left attachment piece (10) previously placed on said cladding cassette (2) by means of the left fixing return (4a),  - to position on the upper part of the right fixing return (4b), a hooking piece (10),  - to fix on the frame (1) said attachment piece (10) by means of the fixing plate (11),  - to be fixed on the second wing (13) of this right attachment piece (10), the right fixing return (4b) of said cladding cassette (2),  - placing and fixing in the same way and successively cladding cassettes (2) and hooking pieces (10) over the entire height of the building to form a second vertical row B of cladding cassettes (2),  - and to install and successively fix cladding cassettes (2) and hooking pieces (10) to form vertical and adjacent rows of cladding cassettes (2) over the entire height of the building and this over the entire length of the building.  13. Method for installing cladding cassettes (2) directly on a frame of a facade of a building, characterized in that it consists  - to be placed and positioned on the lower part of the framework (1), at least one support piece (20) forming a horizontal reference element,  - placing and positioning a vertical reference element (30) on the right edge of the facade of the building,  - placing a first cladding cassette (2) on said support piece (20) so that the lower securing return (5b) of said first cladding cassette (2) is supported on the support (20),  - to fix on said element (30) the first cladding cassette (2) by means of the right fixing return (4b),  - to position on the upper part of the left fixing return (4a), a hooking piece (10),  - to fix on the frame (1) said attachment piece (10) by means of the fixing plate (11),  - to fix on the second wing (13) of said attachment piece (10) the left fixing return (4a) of the first cladding cassette (2),  - to lay and fix in the same way and successively cladding cassettes (2) and hanging pieces (10) over the entire height of the building to form a first vertical row A of cladding cassettes (2),  - placing on said support piece (20) a cladding cassette (2) juxtaposed to the left of the first cladding cassette (2) of the first vertical row A so that the lower securing return (5b) of said cladding cassette (2) rests on the support piece (20),  - to be fixed on the first wing (12) of the right attachment piece (10) previously placed on said cladding cassette (2) by means of the right fixing return (4b),  - to position on the upper part of the left fixing return (4a), a hooking piece (10),  - to fix on the frame (1) said attachment piece (10) by means of the fixing plate (11),  - to be fixed on the second wing (13) of this left attachment piece (10), the left fixing return (4a) of said cladding cassette (2),  - placing and fixing in the same way and successively cladding cassettes (2) and hooking pieces (10) to form a second vertical row B of cladding cassettes (2),  - and to install and successively fix cladding cassettes (2) and hooking pieces (10) to form vertical and adjacent rows of cladding cassettes (2) over the entire height of the building and this over the entire length of said building.