The present disclosure is directed to a structural support system that provides damping of sound and vibration, and more specifically, to a double stud wall with acoustic damping members.
It is desirable in many environments to reduce transmission of sound and vibration through walls of adjacent rooms, such as in high occupancy buildings like apartment and office buildings. To this end, products and methods have been developed to reduce the transmission of sound and vibration in buildings.
One measure of the sound damping characteristics of a wall is called the sound transmission coefficient (STC). The STC of a particular wall provides an indication of the attenuation that the wall provides for acoustic waves and, thus, an indication of the sound damping that the wall provides between adjacent rooms. Standard sheets of drywall, such as low gypsum board, may have an STC of approximately 26. Thicker drywall may have STCs in the range of 28 and 29. Two drywall panels placed abutting each other, if each is a standard gypsum board, will have an STC of 34. Generally, an STC in the range of 35 or lower indicates that a significant amount of sound will pass from one room to another and the wall provides little attenuation for acoustic waves.
In order to obtain attenuation to reach an STC in the range of 55-60, which is often desired, it is currently the practice to create two walls, each of which has a set of studs to support the drywall on both sides of the wall, and then place one or more layers of sound-attenuation material, such as an acoustic damping insulation or other material, between them. While such a structure is sufficient to obtain an STC in the range of 55 or higher, it is expensive, time-consuming to construct, and also takes some skill to properly assemble.
Other past attempts to increase the STC of wall assemblies have focused on specialty products which, in many instances, are prohibitively expensive. Further techniques have been to add significant layers of conventional materials that increase the mass, which, while increasing the STC rating, adds significant cost as well as additional labor cost to install. The assembly of walls has also been split into multiple phases in order to add layers of conventional construction material at additional surfaces to achieve a higher STC rating. However, the additional assembly steps or phases increase cost and the time to complete construction, which negatively impacts the construction schedule. Another downside of using multiple layers of materials, or multiple phases, is the reduction in floor area in the finished building as a result of the additional layers of material extending further into a room than single layers of material. Yet a further downside of some methods and products is that material can extend beyond the outer surface of the studs, which can impact drywall installation or create cracking of the drywall with time.
The present disclosure is directed to a sound damping structural support system. The system includes tracks that are configured to be coupled to supports, such as floor joists, concrete, roof beams, or other similar supports. The tracks are coupled to supports in pairs that are arranged parallel and spaced from each other and aligned vertically to define upper and lower boundaries of a wall. In other words, the tracks include a first pair of tracks that are coupled to concrete at the bottom of a wall and arranged parallel to, but spaced apart from each other. A second pair of tracks are coupled to roof beams at the top of a wall in a similar parallel spaced relationship. The second pair of tracks are aligned with the first pair of tracks to allow for installation of a vertical wall. Each track further includes a channel extending along a length of the track.
The system further includes studs with opposite ends that are received in the channels of the tracks. The studs are aligned in pairs in a dual stud construction. Each of the studs and the tracks include a first wall, a second wall coupled to the first wall, and a third wall coupled to the first wall and spaced from the second wall across a width of the first wall to define the channel. The third wall includes a first portion, a second portion, and a third portion where the first portion is perpendicular to the first wall, the second portion is perpendicular to the first portion, and the third portion is perpendicular to the second portion and parallel to the first portion to define an “L” shaped ledge that extends along a length of the third wall. When the tracks are coupled to the supports, the tracks are arranged with the ledges facing each other. Similarly, the studs are coupled to the tracks with the ledges facing each other.
Acoustic damping members are received on the ledge of adjacent pairs of tracks and on the ledge of adjacent pairs of studs. The acoustic damping members have a rectangular shape with a first outermost surface that is planar with the ledge and a second outermost surface that is planar with an outer surface of the first wall, such that the acoustic damping members are flush with the first wall of each of the studs and each of the tracks. This arrangement allows for installation of drywall over the studs in a flat and planar manner while also increasing the attenuation of sound waves through the wall, which increases the sound transmission coefficient of the finished. Further, the use of acoustic damping members during wall assembly is more efficient in terms of labor and material costs compared to known methods and products.
For a better understanding of the embodiments, reference will now be made by way of example only to the accompanying drawings. In the drawings, identical reference numbers identify similar elements or acts. In some figures, the structures are drawn to scale. In other figures, the sizes and relative positions of elements in the drawings are not necessarily drawn to scale. For example, the sizes, shapes of various elements and angles may be enlarged and positioned in the figures to improve drawing legibility.
The present disclosure is generally directed to structural support systems that attenuate acoustic waves.
As shown in
The distance 112 may be less than 1 inch, 2 inches, 3 inches, 4 inches, 5 inches, 6 inches, or more or less, in some embodiments. Further, each pair of studs 104 is spaced from other pairs of studs 104 along the tracks 102 by a distance 114 that is similarly selected according to design factors and load bearing capacity. In some non-limiting examples, the distance 114 is 16 inches or 24 inches on-center, or at any other standard stud spacing used in the industry or a custom selected stud spacing. Further, although
In some embodiments, the tracks 102, studs 104, and acoustic damping members 116 are assembled in a mass-production factory and sent to a job site for installation. For example, according to one embodiment, the aligned pairs of tracks 102 and the acoustic members 116 coupled to the tracks 102 are assembled at the factory and shipped to the job site for installation as a single, integral, unitary track assembly. The unitary assemblies of the tracks 102, studs 104 and acoustic members 116 can be assembled with the tracks 102 at some selected length, such as 6′, 8′, 12′, 16′, etc. Once on site, they can be used at their original length if the building construction plans permit or they can have their length trimmed while at the construction site to exactly fit the correct length.
The studs 104 and the acoustic members 116 coupled to the studs are assembled at the factory as a single, integral, unitary stud assembly. At the job site, the operator installs the track assemblies and the stud assemblies in single steps to form a single, unitary, integral wall assembly, instead of having to construct each track 102 and stud 104 one at a time, which reduces cost and labor hours. Moreover, the acoustic members 116 dampen or attenuate acoustic and vibration waves, as described herein, and eliminate the need for additional insulation between the tracks 102 and studs 104 in some embodiments, which further reduces costs and saves time. However, the component parts of system 100 can also be manufactured and assembled on site in individual units, including with the installation of additional insulation, in some embodiments.
In use, the installer aligns the tracks 102 with the selected location of a wall. The tracks 102 can be secured to supports by any acceptable method, including fasteners such as sheet metal screws, bolts, and other like structures. Then, the studs 104 are inserted into the channels 106 of the tracks 102 and secured to the tracks 102 by any acceptable method, such as with sheet metal screws. The operator can then install sheet rock or drywall over the assembled system 100 by securing the sheet rock to flat and planar surfaces 117 of the track 102 and the studs 104. In some embodiments, the tracks 102 may have pre-fabricated holes at a set spacing along the tracks 102 for receiving sheet metal screws to couple the studs 104 to the tracks 102. Alternatively, the tracks 102 may not have pre-fabricated holes and the operator couples the studs 104 to the tracks 102 by installing sheet metal screws directly through the tracks 102 and into the studs 104 at selected locations.
In another, alternative embodiment, studs 104, and acoustic damping members 116 are assembled in a mass-production factory and sent to a job site for installation and the tracks 102 are sent separately. While at the job site, the aligned pairs of tracks 102 and the acoustic members 116 coupled to the tracks 102 are assembled together. This permits only the tracks 102 to have their length trimmed while at the construction site to exactly fit the correct length and then the studs 104 and the acoustic members 116 coupled to the studs 104 that were assembled at the factory as a single, integral, unitary stud assembly are connected for the first time to the tracks 102 while at the job site. In this embodiment, the proper number of studs 104 having the acoustic members 116 previously coupled to them are connected at the desired spacing to create the wall on the construction site itself.
A third portion 124C of the third wall 122 is coupled to the second portion 124B and is perpendicular to the second portion 124B. As such, the third wall 122 has a step down configuration with the portions 124A, 124B, 124C defining an insert or ledge 126 that extends along the length of each track 102, in some embodiments. In some embodiments, the first wall 118 is vertical and the second wall 120 is horizontal. The first portion 124A of the third wall 122 is vertical and parallel to the first wall 118. The second portion 1246 of the third wall 122 is horizontal and parallel to the second wall 120 and the third portion 124C of the third wall 122 is vertical and parallel to the first wall 118 and the first portion 124A of the third wall 122. However, the first portion 124A and the third portion 124C of the third wall 122 are offset from each other by a distance corresponding to the second portion 124B, or put differently, the first portion 124A is spaced from the third portion 124C across the second portion 124B. In one or more embodiments, each of the first, second and third portions 124A, 124B, 124C have the same size and length. However, in some embodiments, the first, second and third portions 124A, 124B, 124C have different sizes or lengths. Further, the first wall 118 and any portion 124A, 124B, 124C of the third wall 122 may be at any selected angle to the second wall 120, such as any angle between 0 and 90 degrees or between 90 degrees and 180 degrees in one or more embodiments.
Further, the walls 118, 120, 122 define the channel 106, such that the channel 106 has a first width from the first wall 118 to the first portion 124A of the third wall 122 that is greater than a width of the channel 106 from the first wall 118 to the third portion 124C of the third wall 122, in some embodiments. Put a different way, the channel has a major portion 128A defined by the first wall 118, a portion of the second wall 120 and the third portion 124C of the third wall 124C with a volume that is greater than a minor portion 128B defined by the first and second portions 124A, 124B of the third wall 122 and the remaining portion of the second wall 120. In one or more embodiments, the track 102 has an opposite arrangement, namely the second portion 1246 of the third wall extends away from the first wall 118, as described herein, such that the width between the first wall 118 and the third portion 124C of the third wall 122 is greater than the width between the first wall 118 and the first portion 124A of the third wall 122, as shown in more detail in
The acoustic damping member 116 is received on the ledge 126 of each track 102 and is coupled to the track 102 by adhesives, fasteners, or any other acceptable method. In some embodiments, the acoustic damping member 116 is a rectangular block that is planar with a top of the track 102. More specifically, the acoustic damping member 116 is planar and flush with a top or uppermost edge of the third portion 124C of the third wall 122. The acoustic damping member 116 spans the distance between the tracks 102, but does not extend between the first portions 124A of the third walls 122 of the tracks 102. In other words, there is a gap or space 130 between the first portions 124A of the third walls 122 of the pairs of tracks 102, as shown in
The third wall 136 includes a first portion 138A coupled to a second portion 138B and a third portion 138C coupled to the second portion 138B. The first portion 138A of the third wall 136 is perpendicular to the first wall 132 and extends vertically from the first wall 132, in some embodiments. As such, the first portion 138A of the third wall 136 is parallel to the second wall 134. The second portion 138B is perpendicular to the first portion 138A and extends horizontally from the first portion 138A of the third wall 136. The second portion 1386 is therefore parallel to the first wall 132, in some embodiments. The third portion 138C is perpendicular to the second portion 138B of the third wall 136 and extends vertically from the second portion 1386, in parallel with the first portion 138A and the second wall 134. However, the third portion 138C of the third wall 136 is offset from the first portion 138A by the second portion 138B, meaning that the third portion 138C is spaced from the first portion 138A across the second portion 1386. The first, second, and third walls 132, 134, 136 of the stud 104 define a channel 140 extending along a length of the stud 104 in some embodiments.
Further, the first, second, and third portions 138A, 1386, 138C of the third wall 136 define a ledge or insert 142 extending along a length of the stud 104, similar to the ledge 126 described with reference to the tracks 102 in
In some embodiments, the acoustic damping members 116 are planar with the first wall 132 as well as the first and second portions 138A, 1386 of the third wall 136. However, the acoustic damping members 116 do not extend between the studs 104 at the third portion 138C of the third wall 136. In other words, as shown in
The tracks 102 and studs 104 described herein can be metal studs, such as sheet metal studs made of steel, aluminum, or can be made from any other acceptable material, including but not limited to any material now listed or included in the future in the American Society for Testing Materials. Further, the tracks 102 and studs 104 can have dimensions, sizes, and thicknesses (or gauges) that are any acceptable value within the industry, in some embodiments. There are a number of types of material which would be acceptable for the acoustic damping members 116. In some non-limiting examples, the members 116 may be formed of various types of rigid materials, rubber, plastic, PVC, foam, sponges, gels, or the like. One material which has been found to be acceptable is a type of material known as IV3, which is a foam cell polymer material. In the industry, it is sometimes sold under the name Ensolite IV3 and is available from many different manufacturers. This is a closed-cell stiff foam material that is made of a polymer. It can, in some instances, include neoprene, PVC, or a type of sponge rubber.
In
Both the assembly 400 and the assembly 500 have an adjustable height to allow for one stud to be used at a construction site for walls of varying heights. For example, a minimum length of the assemblies 400, 500 may be 6 feet in a collapsed configuration and a maximum length may be 10 or 12 feet or more for assembly 400 and 18 feet for assembly 500 in some non-limiting examples. Further, it is known that there are often variations in the actual installation dimensions of wall studs. For example, although plans may call for an 8 foot wall stud, variations in construction may result in the actual height of the stud being 7 feet, 8 inches or 8 feet, 4 inches, in some examples. As such, standard studs are cut down to size on the job site, which increases labor costs for the additional measuring and cutting time and produces waste. By using either of the assemblies 400, 500, the stud can be extended to the selected installation height and installed without cutting, such that assemblies 400, 500 are more efficient. The assemblies 400, 500 can be coupled to other structural supports by any acceptable method, such as with sheet metal screws. Similarly, the studs 402, 404 and 502, 504, 506 can be coupled to each other to increase structural strength by any acceptable method, such as with sheet metal screws or other fasteners. In some embodiments, the studs 402, 404 and 502, 504, 506 may have pre-fabricated holes for receiving fasteners. Alternatively, the studs 402, 404 and 502, 504, 506 may not have pre-fabricated holes and the fasteners may be inserted directly through the studs 402, 404, 502, 504, 506 at a selected location. The assemblies 400, 500 can be used without the acoustic damping members described herein, or the damping members may be attached after the studs 402, 404 and 502, 504, 506 are adjusted to the final installation length.
As such, the embodiments of the present disclosure provide for wall assemblies that attenuate acoustic waves through isolation and with acoustic damping members. The studs can be installed as a single unit, which reduces cost. In some embodiments, the studs have an adjustable length in order to account for variations in installation dimensions or to allow the same stud to be used for different size walls.
In the above description, certain specific details are set forth in order to provide a thorough understanding of various disclosed embodiments. However, one skilled in the relevant art will recognize that embodiments may be practiced without one or more of these specific details, or with other methods, components, materials, etc. In other instances, well-known structures associated with structural supports, sound damping, and vibration isolation devices, systems, and methods have not been shown or described in detail to avoid unnecessarily obscuring descriptions of the embodiments.
Unless the context requires otherwise, throughout the specification and claims which follow, the word “comprise” and variations thereof, such as, “comprises” and “comprising” are to be construed in an open, inclusive sense, that is as “including, but not limited to.” Further, the terms “first,” “second,” and similar indicators of sequence are to be construed as interchangeable unless the context clearly dictates otherwise.
Reference throughout this specification to “one embodiment” or “an embodiment” means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases “in one embodiment” or “in an embodiment” or other like phrases, such as “in one or more embodiments” or “in some embodiments” in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” include plural referents unless the content clearly dictates otherwise. It should also be noted that the term “or” is generally employed in its broadest sense that is as meaning “and/or” unless the content clearly dictates otherwise.
The relative terms “approximately” and “substantially,” when used to describe a value, amount, quantity, or dimension, generally refer to a value, amount, quantity, or dimension that is within plus or minus 5% of the stated value, amount, quantity, or dimension, unless the context clearly dictates otherwise. It is to be further understood that any specific dimensions of components or features provided herein are for illustrative purposes only with reference to the various embodiments described herein, and as such, it is expressly contemplated in the present disclosure to include dimensions that are more or less than the dimensions stated, unless the context clearly dictates otherwise.
The various embodiments described above can be combined to provide further embodiments. All of the U.S. patents, U.S. patent application publications, U.S. patent applications, foreign patents, foreign patent applications and non-patent publications referred to in this specification and/or listed in the Application Data Sheet are incorporated herein by reference, in their entirety. Aspects of the embodiments can be modified, if necessary to employ concepts of the various patents, applications and publications to provide yet further embodiments.
These and other changes can be made to the embodiments in light of the above-detailed description. In general, in the following claims, the terms used should not be construed to limit the claims to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled. Accordingly, the claims are not limited by the disclosure.
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