EP4628669A1

EP4628669A1 - Stud for a framework for an acoustic insulation system

Info

Publication number: EP4628669A1
Application number: EP24305509.2A
Authority: EP
Inventors: Gary JACQUS; Sylvain BERGER
Original assignee: Saint Gobain Placo SAS
Current assignee: Saint Gobain Placo SAS
Priority date: 2024-04-03
Filing date: 2024-04-03
Publication date: 2025-10-08

Abstract

Stud (10) for a framework for an acoustic insulation system, the stud (10) extending in a main direction (X) and having a length (L) in the main direction (X), the stud (10) comprising two walls (14), at least one wall (14) being configured to be fixedly mounted on a facing board (24), an air blade (16) being disposed between the two walls (14) on at least 20% of the length (L), preferably at least 50% of the length (L), or preferably at least 80% of the length (L) and a maximum of 99% of the length (L), preferably a maximum of 95% of the length (L), the stud (10) comprising a stud head (18) and a stud foot (20), the stud (10) being free of air blade in the stud head (18) and in the stud foot (20).Method of manufacturing the stud and assembly of a stud and a facing board.

Description

Technical area

The invention relates to a framework for an acoustic insulation system, in particular a stud for a framework for an acoustic insulation system, a method of manufacturing the stud.

Prior art

It is known to manufacture a drywall panel comprising a framework and two facing boards, for example plaster boards, fixed on either side of the framework. The framework may be formed by a framework, for example a metal framework. The framework may include furring strips, studs, rails, angle bars and/or spacers. Each of these elements may be metallic.
For example, it is known to manufacture an studs formed by a metal profile having a "U" or "C" shaped section. Such a stud has a stiffness high enough for the panel to have mechanical resistance meeting the criteria imposed by building construction. However, when using such a stud to manufacture the panel, increasing the stiffness of the amount results in a decrease in the sound insulation of the partition panel. Indeed, a stud having a high stiffness allows transmission of an acoustic wave between the two boards without decoupling the wave.
To this end, document WO 2012/131284 describes a partition stud comprising two parts separated from each other. Each of the parts includes a side wall of the stud. The two parts are connected by an element formed by a material allowing acoustic decoupling. However, the manufacture of such a stud is complex, because it includes separate manufacturing steps for each of the parts and a step of bonding each of the parts to the element allowing acoustic decoupling. In addition, the stud described has lower mechanical resistance than a stud devoid of the element allowing acoustic decoupling during the application of high loads.
In addition, the manufacturing of a metal framework consumes a lot of energy and produces significant quantities of greenhouse gases.

Presentation of the invention

The present disclosure aims to remedy at least part of these drawbacks.
Therefore, according to embodiments of the present disclosure, a stud for a framework for an acoustic insulation system is provided. The stud extends in a main direction and has a length in the main direction, the stud comprises two walls, at least one wall being configured to be fixedly mounted on a facing board, an air blade being disposed between the two walls on at least 20% of the length, preferably at least 50% of the length, or preferably at least 80% of the length and a maximum of 99% of the length, preferably a maximum of 95% of the length, the stud comprising a stud head and a stud foot, the stud being free of air blade in the stud head and in the stud foot.
Thanks to the presence of the air blade between the walls of the stud, for deformations of low amplitude, such as deformations generated by an acoustic wave, the energy of the incident acoustic wave is dissipated by the wall of the stud which is free to move relative to the core and the acoustic wave is damped, the transmission of the vibration to the other side of the partition being limited. Acoustic insulation is therefore improved.
When the amplitude of deformation is greater, the wall of the stud may abut against each other, and the deformation is limited to the displacement of the wall relative to each other over a maximum distance equal to the thickness of the air blade. This deformation makes it possible to guarantee the integrity of a facing board which would be fixedly mounted on the stud. The stud therefore makes it possible to improve acoustic insulation while having adequate mechanical resistance for a stud for a framework.
Thus, the stud has non-linear mechanical behavior allowing for damping acoustic waves and having adequate mechanical resistance.
The stud comprising the walls is different from a metal profile, for example a "U" or "C" shaped metal profile.
The presence of the air blade between the walls of the stud makes it possible to use materials other than metal and/or to reduce the use of metal in the framework.
As non-limiting examples, the wall may be made of wood, for example solid wood, chipboard wood, laminated wood, cardboard, or metal.
The use of wood for the stud makes it possible to reduce the production of greenhouse gases, compared to a stud made of a metal profile.
As non-limiting example, the wall may be made of an organic polymer, for example an elastomeric organic polymer or a non-elastomeric organic polymer.
As non-limiting example, the wall may be made of cardboard, for example cellular cardboard.
As a non-limiting example, the two walls may comprise the same material.
As a non-limiting example, the two walls may comprise different materials.
As non-limiting examples, the facing board may be a gypsum board, gypsum fiber board, wood chipboard, laminated wood, or any other suitable construction panel.
As non-limiting example, the first wall is configured to be fixedly mounted on a facing board and the second wall may be configured to be fixedly mounted on a facing board.
As non-limiting example, the second wall may be configured to be fixedly mounted on a wall structure. The wall structure may be a vertical or horizontal structure; the wall structure may form an angle with respect to the vertical of between 0° and 90°.
In some embodiments, the wall has a thickness of between 0.5 mm and 75 mm, preferably between 2 mm and 50 mm, preferably between 5 mm and 30 mm.
The thickness of the wall may vary as a function of the material used and as a function of the length of the stud.
As non-limiting example, when the wall is made of wood, the thickness of the wall may be greater than or equal to 10 mm.
In some embodiments, the air blade has a thickness of between 0.5 mm and 100 mm, preferably between 1 mm and 70 mm, preferably between 1.5 mm and 40 mm, preferably between 2 mm and 10 mm.
The lower value of the range corresponds to the minimum thickness of the air blade and the upper value of the range corresponds to the maximum thickness of the air blade.
In some embodiments, the thickness of the air blade is not constant.
The thickness of the air blade may vary along the length of the stud, having a minimum thickness and a maximum thickness.
In some embodiments, the stud comprises a core, the air blade being a first air blade and the stud comprises a second air blade, each air blade being disposed between the core and one of the walls over at least 20% of the length, preferably over at least 50% of the length, or preferably at least 80% of the length and a maximum of 99% of the length, preferably a maximum of 95% of the length.
The core is sandwiched between the first wall and the second wall. The first wall is spaced from the core by the first air blade and the second wall is spaced from the core by the second air blade.
When the amplitude of deformation is greater than deformations generated by an acoustic wave, the wall of the stud may abut against the core, and the deformation is limited to the displacement of the wall relative to the core over a maximum distance equal to the thickness of the air blade. This deformation makes it possible to guarantee the integrity of a facing board which would be fixedly mounted on the stud. The stud therefore makes it possible to improve acoustic insulation while having adequate mechanical resistance for a stud for a framework.
As a non-limiting example, the core and the wall may comprise the same material.
As a non-limiting example, the core and the wall may comprise different materials.
In some embodiments, the stud head and/or the stud foot comprises a spacer positioned at least partially between the walls.
As non-limiting examples, the spacer may be made of wood, metal, cardboard, organic polymer or a mixture of these materials.
In some embodiments, the spacer and the wall are in one piece.
The spacer is not a separated element from the wall.
In some embodiments, the stud head and/or the stud foot comprises a spacer positioned at least partially between the wall and the core.
In some embodiments, the spacer and the wall are in one piece.
In some embodiments, the spacer and the core are in one piece.
In some embodiments, the spacer has an elastic modulus less than or equal to 100 MPa, preferably less than or equal to 20 MPa and a damping factor greater than or equal to 0.1, preferably greater than or equal to 0.2.
As non-limiting example, the spacer may comprise EPDM, rubber, nitrile, PU, foams.
In some embodiments, the spacer comprises wood.
The elastic modulus is measure according to ISO 18437-2:2005.
In some embodiments, the wall comprises at least one stiffening wedge.
The stiffening wedge is placed in the air blade, between the two walls, and makes it possible to stiffen the stud and thus improve the mechanical strength of the stud.
In some embodiments, the stiffening wedge is fixed on the wall and/or the core.
The stiffening wedge is a distinct element from the wall and/or the core.
In some embodiments, the stiffening wedge and the wall and/or the core are in one piece.
The stiffening wedge is not a separated element from the wall and/or the core.
In some embodiments, the stiffening wedge has a thickness less than or equal to the thickness of the air blade.
It is understood that when the thickness of the air blade is not constant, the thickness of the stiffening wedge is less than or equal to the maximum thickness of the air blade.
As non-limiting example, the stiffening wedge may be in contact with both walls.
As non-limiting example, stiffening wedge may be in contact with one wall only, stiffening locally the wall, and limiting the deformation of the wall of the stud to the thickness of the air blade present between the stiffening wedge and the opposite wall and/or the core and/or an opposite stiffening wedge.
When it is necessary to reduce the height of the stud, the stiffening wedge may also act as a spacer between the web and the wall at the head and/or the stud foot. For the stiffening wedge to be able to act as a spacer at the head and/or a stud foot, the thickness of the stiffening wedge would be equal to the thickness of the desired air blade between the wall and the core of the stud.
According to embodiments of the present disclosure, an assembly of a stud and a facing board is provided. The stud is the above-defined stud and the facing board is fixedly mounted on the wall of the stud.
The facing board may be fixed to the wall by means of fixing elements, for example screws.
In some embodiments, the fixing element has a length at least 0.5 mm less than or equal to the sum of the thickness of the wall, the thickness of the facing board and the thickness of the air blade.
In some embodiments, the fixing element has a length less than or equal to the sum of the thickness of the wall and the thickness of the facing board.
Thus, during slight movements of the facing board, such as those caused by acoustic oscillations of the facing board, the fixing element does not abut against the core of the stud.
In some embodiments, the assembly comprises a second facing board fixedly mounted on the second wall.
According to embodiments of the present disclosure, a method of manufacturing a stud is provided. The stud is the above-defined stud and the method comprises a step of creating the air blade in the stud.
In some embodiments, the step of creating the air blade is carried out by cutting the stud.
In some embodiments, the step of creating the air blade is carried out by a step of assembling the walls.
As non-limiting examples, the assembly of the walls may be carried out by screwing, gluing and/or embedding.
In some embodiments, the method comprises a step of positioning the spacer at least partially between the walls.
The spacer allows for a simple shape of the walls. Indeed, protruding part in the stud head and stud foot is not required for creating the air blade between the two walls.
In some embodiments, the step of creating the air blade is carried out by a step of assembling the core with the walls.
In some embodiments, the method comprises a step of positioning the spacer at least partially between the core and the walls.
In some embodiments, the method includes a step of cutting the stud in a direction perpendicular to the main direction before the step of positioning the spacer.
The same steps of cutting the stud before positioning the spacer may also be carried out during installation, so that the installer may adjust the height of the stud to the precise height required. The length of the stud may be adapted.
In some embodiments, the method includes a step of mounting the stiffening wedge the wall.
It is intended that combinations of the above-described elements and those within the specification may be made, except where otherwise contradictory.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure, as claimed.

Brief description of the drawings

Features, advantages, and technical and industrial significance of exemplary embodiments of the invention will be described below with reference to the accompanying drawings, in which like signs denote like elements.

[Fig. 1] Figure 1 is a schematic perspective view of a stud according to one embodiment.
[Fig. 2] Figure 2 is a schematic view along the section plane II-II of Figure 1 of a stud according to another embodiment.
[Fig. 3] Figure 3 is a schematic sectional view of a drywall comprising the stud of Figure 2.
[Fig. 4] Figure 4 is a schematic view of a drywall with a stud according to another embodiment.
[Fig. 5] Figure 5 is a schematic view of a drywall with a stud according to another embodiment.
[Fig. 6] Figure 6 is a schematic view of a stud according to another embodiment.
[Fig. 7] Figure 7 is a flowchart representing the steps of a method for manufacturing a stud.
[Fig. 8] Figure 8 is a schematic view representing the stages of cutting the stud.
[Fig. 9] Figure 9 is a schematic view of a drywall with a stud according to another embodiment.
[Fig. 10] Figure 10 is a schematic view of a drywall with a stud according to another embodiment.
[Fig. 11] Figure 11 is a schematic view of a drywall with a stud according to another embodiment.
[Fig. 12] Figure 12 is a schematic view of a drywall with a stud according to another embodiment.
[Fig. 13] Figure 13 is a graph representing noise reduction (in dB) versus frequency (in Hz).

Wherever possible, in the figures, same elements are identified by identical reference numbers.

Detailed description

Reference will now be made in detail to exemplary embodiments of the disclosure, examples of which are illustrated in the accompanying drawings.
Figure 1 is a schematic perspective view of a framework stud 10 according to one embodiment of the stud 10.
In the embodiment of Figure 1, the stud 10 comprises a main direction X and has a length L in the main direction X.
In the embodiment of Figure 1, the stud 10 comprises a core 12, a first wall 14A and a second wall 14B. The core 12 is sandwiched between the first wall 14A and the second wall 14B. The first wall 14A is spaced from the core 12 by the first air blade 16A and the second wall 14B is spaced from the core 12 by the second air blade 16B.
In the embodiment of Figure 1, the first wall 14A and/or the second wall 14B is configured to be fixedly mounted on a facing board (not shown).
In the embodiment of Figure 1, the stud 10 comprises a stud head 18 and a stud foot 20. The stud head 18 is located opposite the stud foot 20 in the main direction stud 18 and stud foot 20 are free of air blade. The first air blade 16A and the second air blade 16B are not present over the entire length L of the stud 10.
In the embodiment of Figure 1, the first air blade 16A and the second air blade 16B are present between respectively the first wall 14A and the second wall 14B over at least 20% of the length, preferably over at least 50% of the length, or preferably at least 80% of the length and a maximum of 99% of the length, preferably a maximum of 95% of the length.
In the embodiment of Figure 1, the first air blade 16A has a thickness E16A and a length L16 and the second air blade 16B has a thickness E16B and a length L16.
In the embodiment of Figure 1, the first air blade 16A and the second air blade 16B are of equal dimensions. They could be of different dimensions.
In the embodiment of Figure 1, the first wall 14A has a thickness E14A and a length L14 and the second wall 14B has a thickness E14B and a length L14.
In the embodiment of Figure 1, the first wall 14A and the second wall 14B are of equal dimensions. They could be of different dimensions.
In the embodiment of Figure 1, the core 12 has a length L12.
In the embodiment of Figure 1, the length L12 of the core 12, the length L14 of the first wall 14A and the second wall 14B and the length L16 of the first air blade 16A and the second air blade 16B are equal. Lengths could be different.
In the embodiment of Figure 1, the core 12 is assembled to the first wall 14A and to the second wall 14B by the stud head 18 and the stud foot 20. The assembly may be carried out by screwing, gluing and/or embedding.
Figure 2 represents a schematic view along the section plane II-II of Figure 1 of a stud 10 according to another embodiment of the stud 10. The stud 10 of Figure 2 differs from the stud 10 of Figure 1 in stud head 18 and at the stud foot 20.
In the embodiment of Figure 2, the first air blade 16A and the second air blade 16B are present between respectively the first wall 14A and the second wall 14B over at least 20% of the length, preferably over at least 50% of the length, or preferably at least 80% of the length and a maximum of 99% of the length, preferably a maximum of 95% of the length.
In the embodiment of Figure 2, the first air blade 16A has a thickness E16A and a length L16 and the second air blade 16B has a thickness E16B and a length L16.
In the embodiment of Figure 2, the first air blade 16A and the second air blade 16B are of equal dimensions. They could be of different dimensions.
In the embodiment of Figure 2, the first wall 14A has a thickness E14A and a length L and the second wall 14B has a thickness E14B and a length L.
In the embodiment of Figure 2, the first wall 14A and the second wall 14B are of equal dimensions. They could be of different dimensions.
In the embodiment of Figure 2, the length L12 of the core 12 and the length L16 of the first air blade 16A and the second air blade 16B are equal. Lengths could be different.
In the embodiment of Figure 2, the length L of the stud 10 and the length L of the first wall 14A and the second wall 14B are equal. Lengths could be different.
In the embodiment of Figure 2, the core 12 is assembled to the first wall 14A and to the second wall 14B by the stud head 18 and the stud foot 20. The assembly may be carried out by screwing, gluing and/or embedding.
Figure 3 is a schematic sectional view of a drywall 22 comprising the stud 10 of Figure 2.
In the embodiment of Figure 3, the dry wall 22 comprises a first facing board 24A fixedly mounted on the first wall 14A of the stud 10 and a second facing board 24B fixedly mounted on the second wall 14B of the stud 10 by means fixing elements, for example screws 26.
In the embodiment of Figure 3, the first facing board 24A has a thickness E24A and the second facing board E24B has a thickness E24B. The thicknesses E24A, E24B of the first and second facing boards 24A, 24B are equal. They could be different.
In the embodiment of Figure 3, the screws 26 have a length, measured perpendicular to the main direction X, less than or equal to the sum of the thickness E14A of the first wall 14A and the thickness E24A of the first facing board 24A.
In the embodiment of Figure 3, the screws 26 have a length, measured perpendicular to the main direction X, less than or equal to the sum of the thickness E14B of the second wall 14B and the thickness E24B of the second facing board 24B.
Figure 4 is a schematic sectional view of a drywall 22 according to another embodiment of the stud 10.
In the embodiment of Figure 4, the stud 10 comprises two walls, a first wall 14A and second wall 14B.
In the embodiment of Figure 4, the first facing board 24A is fixedly mounted on the first wall 14A and the second facing board 24B is fixedly mounted on the second wall 14B.
In the embodiment of Figure 4, the screws 26 have a length, measured perpendicular to the main direction X, less than the sum of the thickness E14A of the first wall 14A and the thickness E24A of the first facing board 24A.
In the embodiment of Figure 4, the screws 26 have a length, measured perpendicular to the main direction X, less than the sum of the thickness E14B of the second wall 14B and the thickness E24B of the second facing board 24B.
In the embodiment of Figure 4, the length the length L14 of the first wall 14A and the second wall 14B and the length L16 of the air blade 16 are equal. Lengths could be different. The stud 10 has a length L.
In the embodiment of Figure 4, the first wall 14A is assembled to the second wall 14B by the stud head 18 and the stud foot 20. The assembly may be carried out by screwing, gluing and/or embedding.
As non-limiting example, the thickness E14A of the first wall 14A may be equal to the thickness E14B of the second wall 14B and equal to 20 mm. The thickness E16 of the air blade 16 may be equal to 10 mm.
Figure 5 is a schematic sectional view of a drywall 22 according to another embodiment of the stud 10.
In the embodiment of Figure 5, the stud 10 comprises a first wall 14A and a second wall 14B.
In the embodiment of Figure 5, the first facing board 24A is fixedly mounted on the first wall 14A and the second facing board 24B is fixedly mounted on the second wall 14B.
In the embodiment of Figure 5, the screws 26 have a length, measured perpendicular to the main direction X, less than the sum of the thickness E14A of the first wall 14A and the thickness E24A of the first facing board 24A.
In the embodiment of Figure 5, the screws 26 have a length, measured perpendicular to the main direction X, less than the sum of the thickness E14B of the second wall 14B and the thickness E24B of the second facing board 24B.
In the embodiment of Figure 5, the length L14A of the first wall 14A and the length L16 of the air blade 16 are equal. Lengths could be different. The stud 10 has a length L which is equal to the length L14B of the second wall 14B.
In the embodiment of Figure 5, the first wall 14A is assembled to the second wall 14B by the stud head 18 and the stud foot 20. The assembly may be carried out by screwing, gluing and/or embedding.
As non-limiting example, the thickness E14A of the first wall 14A may be equal to 40 mm and the thickness E14B of the second wall 14B may be equal to 5 mm. The thickness E16 of the air blade 16 may be equal to 10 mm.
Figure 6 is a schematic sectional view similar to that of Figure 2. The embodiment of Figure 6 differs from the embodiment of Figure 2 in that the first wall 14A comprises at least one stiffening wedge 28 disposed between the core 12 and the first wall 14A and the second wall 14B comprises at least one stiffening wedge 28 disposed between the core 12 and the second wall 14B.
In the embodiment of Figure 6, the stud 10 comprises two stiffening wedges 28 disposed between the core 12 and the first wall 14A and two stiffening wedges 28 disposed between the core 12 and the second wall 14B. The stiffening wedges 28 are placed in the first air blade 16A and the second air blade 16B. Either the first air blade 16A or the second air blade 16B may have no stiffening wedges 28.
We understand that although described in the context of the embodiment of Figure 6, the stiffening wedges may be present in the different embodiments described previously and not limited to the number and location of the stiffening wedges of the embodiment of Figure 6.
Figure 7 is a flowchart representing the steps of a manufacturing process 100 of a stud 10 according to one of the embodiments described above.
The manufacturing process 100 includes a step 102 of creating the air blade 16 in the stud 10.
The step of creating 102 of the air blade 16 may be carried out by a step of assembling the core 12 with the wall 14. The assembly may be carried out by screwing, gluing and/or embedding.
The step of creating 102 of the air blade 16 may be carried out by cutting the stud 10.
The manufacturing process 100 may also include a step of cutting 104 of the stud 10 in a direction perpendicular to the main direction X and a step of positioning 106 of the spacer 30 at least partially between the core 12 and the wall 14.
Figure 8 is a schematic view representing the cutting steps 104 of the stud 10 and two embodiments of the positioning of the spacer 30 at the stud head 18.
In one of the embodiments, a first spacer 30A is positioned at the stud head 18 between the core 12 and the first wall 14A and a second spacer 30B is positioned at the stud head 18 between the core 12 and the second wall 14B .
In the other embodiment, the spacer 30 comprises a first part 30A positioned at the stud head 18 between the core 12 and the first wall 14A and a second part 30B is positioned at the stud head 18 between the core 12 and the second wall 14B. In this embodiment, the spacer 30 is therefore positioned at least partially between the first and second walls 14A, 14B and the core 12.
The spacer 30 may be made of material which has a modulus of elasticity less than or equal to 100 MPa, preferably less than or equal to 20 MPa and a damping factor greater than or equal to 0.1, preferably greater than or equal to 0.2.
As non-limiting example, the spacer may comprise EPDM, rubber, nitrile, PU, foams.
The spacer 30 may be made of the same material as the core 12.
The spacer 30 may be made of the same material as the wall 14.
The spacer 30 is shown at the stud head 18, it could be at stud foot 20 or at the stud head 18 and at the stud foot 20.
We understand that it is not necessary to have to cut the stud to use spacers 30. Spacers 30 may be a method of assembly.
Figure 9 is a schematic sectional view similar to that of Figure 2. The embodiment of Figure 9 differs from the embodiment of Figure 2 in that the stud 10 comprises a first wall 14A and a second wall 14B and at least one stiffening wedge 28 disposed between the first wall 14A and the second wall 14B.
In the embodiment of Figure 9, the first wall 14A comprises one stiffening wedge 28 disposed between the first wall 14A and the second wall 14B and the second wall 14B comprises one stiffening wedge 28 disposed between the first wall 14A and the second wall 14B.
In the embodiment of Figure 9, the stiffening wedges 28 are facing one another.
In the embodiment of Figure 9, the air blade 16 has not a constant thickness, the air blade 16 has a minimum thickness E16m and a maximum thickness E16M.
In the embodiment of Figure 9, the thickness E28 of the stiffening wedges 28 is smaller than the maximum thickness E16M of the air blade 16. The thickness E28 of the stiffening wedges 28 may vary from one stiffening wedge to another.
Figure 10 is a schematic sectional view similar to that of Figure 9. The embodiment of Figure 10 differs from the embodiment of Figure 9 in that the first wall comprises two stiffening wedges 28 and the second wall comprises two stiffening wedges 28.
Figure 11 is a schematic sectional view similar to that of Figure 9. The embodiment of Figure 11 differs from the embodiment of Figure 9 in that the stiffening wedge 28 of the first wall 14A is not facing the stiffening wedge 28 of the second wall 14B.
Figure 12 is a schematic sectional view similar to that of Figure 9. The embodiment of Figure 12 differs from the embodiment of Figure 9 in that the stiffening wedges 28 are in one piece with respectively the first wall 14A and the second wall 14B.
Figure 13 is a graph showing noise reduction (in dB) on the Y axis versus frequency (in Hz) on the X axis for different partitions.
For all measurements, the opening that was closed by the drywall has a height of 2.10 m and a width of 1.8 m, the studs are spaced approximately 400 mm apart, the first and second facing boards 24A, 24B are plaster facing boards having a thickness of 13 mm (E24A = E24B = 13 mm), the spacing between the two facing boards is equal to 70 mm. The space between the studs and the facing boards is filled with an insulating material, for example glass wool. The facing boards are fixed to the studs by screws, the screws are spaced vertically about 300 mm.
The phantom curve (curve D) represents the behavior of a metal frame comprising "C"-shaped metal studs.
The solid line curve (curve A) represents the behavior of a fir wood frame comprising massive studs having a section of 44 mm by 70 mm.
The dotted line curve (curve B) represents the behavior of a fir wood frame comprising studs having a section of 44 mm by 70 mm , the core 12 having a thickness E12 measured perpendicular to the plane of the facing boards of 40 mm, the first and second walls 14A, 14B having a thickness E14A, E14B equal to 10 mm and the first and second air blade 16A, 16B having a thickness E16A, E16B equal to 5 mm. The screws are 20 mm long. The core 12, the first wall 14A and the second wall 14B are assembled with screws and by positioning spacers 30 having a thickness of 5 mm between the core 12 and the first wall 14A and between the core 12 and the second wall 14B at the stud head 18 and at the stud foot 20. The spacers are made of fir wood and have a length equal to 100 mm. The first and second air blade 16A, 16B have a length L16 equal to 1.90 mm and the stud 10 has a length L equal to 2.1 m.
The dashed line curve (curve C) represents the behavior of a wooden frame similar to the wooden frame shown in dotted line and comprising stiffening blocks 28 made of fir wood having a thickness of 5 mm, a length in the main direction equal to 30 mm and arranged halfway up the stud 10.
As may be seen, the partitions with frames comprising studs according to one of the embodiments described above have sound reduction characteristics at least equivalent to partitions with metal frames, or even improved.
Although the present disclosure refers to specific exemplary embodiments, modifications may be provided to these examples without departing from the general scope of the invention as defined by the claims. Furthermore, individual characteristics of the different illustrated/mentioned embodiments may be combined in additional embodiments. Therefore, the description and the drawings should be considered in an illustrative rather than in a restrictive sense.

Claims

Stud (10) for a framework for an acoustic insulation system, the stud (10) extending in a main direction (X) and having a length (L) in the main direction (X), the stud (10) comprising two walls (14), at least one wall (14) being configured to be fixedly mounted on a facing board (24), an air blade (16) being disposed between the two walls (14) on at least 20% of the length (L), preferably at least 50% of the length (L), or preferably at least 80% of the length (L) and a maximum of 99% of the length (L), preferably a maximum of 95% of the length (L), the stud (10) comprising a stud head (18) and a stud foot (20), the stud (10) being free of air blade in the stud head (18) and in the stud foot (20).
Stud (10) according to claim 1, in which the wall (14) has a thickness (E14) of between 0.5 mm and 75 mm, preferably between 2 mm and 50 mm, preferably between 5 mm and 30 mm.
Stud (10) according to claim 1 or 2, in which the air blade (16) has a thickness (E16) of between 0.5 mm and 100 mm, preferably between 1 mm and 70 mm, preferably between 1.5 mm and 40 mm, preferably between 2 mm and 10 mm.
Stud (10) according to any one of claims 1 to 3, comprising a core (12), the air blade (16) being a first air blade (16A) and the stud (10) comprising a second air blade (16B), each air blade (16A, 16B) being disposed between the core (12) and one of the walls (14) over at least 20% of the length, preferably over at least 50% of the length, or preferably at least 80% of the length and a maximum of 99% of the length, preferably a maximum of 95% of the length.
Stud (10) according to any one of claims 1 to 4, in which the stud head (18) and/or the stud foot (20) comprises a spacer (30) positioned at least partially between the walls (14).
Stud (10) according to claims 4 and 5, in which the spacer (30) is positioned at least partially between the wall (14) and the core (12).
Stud (10) according to claim 5 or 6, in which the spacer (30) has an elastic modulus less than or equal to 100 MPa, preferably less than or equal to 20 MPa and a damping factor greater than or equal to 0.1, preferably greater than or equal to 0.2.
Stud (10) according to claim 5 or 6, in which the spacer (30) comprises wood.
Stud (10) according to any one of claims 1 to 8, the wall (14) comprises at least one stiffening wedge (28).
Assembly of a stud (10) according to any one of claims 1 to 9 and a facing board (24), the facing board (24) being fixedly mounted on the wall (14) of the stud (10).
Method (100) of manufacturing a stud (10) according to any one of claims 1 to 9, comprising a step of creating (102) the air blade (16) in the stud (10).
Method (100) according to claim 11, in which the step of creating (102) the air blade (16) is carried out by cutting the stud (10).
Method (100) according to claim 11 or 12, in which the step of creating (102) the air blade (16) is carried out by a step of assembling the walls (14).
Method (100) according to any one of claims 11 to 13 in combination with claim 5, comprising a step of positioning (106) the spacer (30) at least partially between the walls (14).
Method (100) according to claim 11 or 12 in combination with claim 4, in which the step of creating (102) the air blade (16) is carried out by a step of assembling the core (12) with the walls (14).
Method (100) according to any one of claims 11 to 13 in combination with claim 6, comprising a step of positioning (106) the spacer (30) at least partially between the core (12) and the walls (14).
Method (100) according to claim 14 or 16, comprising a step of cutting (104) of the stud (10) in a direction perpendicular to the main direction (X) before the step of positioning (106) of the spacer (30).
Manufacturing method (100) according to any one of claims 11 to 17 in combination with claim 9, comprising a step of mounting (108) the stiffening wedge (28) on the wall (14).