COLD FORMED STUD
A cold formed metal stud is provided for commercial and residential construction applications. The metal stud of the present invention is suitable for use in both composite and non-composite applications. The metal stud of the present invention includes an intermediate web, a first flange and a second flange. The first flange has a longitudinally extending channel. Each of the intermediate web, first flange and second flange may include a number of different design features that can increase the structural and heat transfer characteristics of the metal stud.
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This is a continuation-in-part of co-pending application Ser. No. 12/868,806 filed on Aug. 26, 2010.
FIELD OF THE INVENTIONThe present invention relates to cold formed metal studs for composite and non-composite applications in residential and commercial construction projects.
BACKGROUND OF THE INVENTIONStuds are commonly used in the construction industry to provide a support for a wall surface and further support a roof, a floor or the like. Studs can be comprised of a variety of materials including wood and metal. Metal studs are commonly used in a variety of construction styles as they can be manufactured economically and are light, strong and durable.
Metal studs are commonly fashioned from a piece of sheet metal that is cold formed to desired specifications. Cold forming involves working a material below its recrystallization temperature. Generally, cold forming occurs at the ambient temperature of the work environment. The resultant cold formed material is stronger due to manipulations that have been made to the crystal structure of the material. Cold forming is an economical manufacturing process as it does not require the significant energy input required to raise the material above its recrystallization temperature. Cold forming has the further advantage of providing steel structural components that have increased yield capacity in comparison to steel structural components that have not been cold formed.
Pre-fabricated metal studs are well-known in the construction industry. However, there is a distinct lack of metal studs that have been specifically designed for use with both composite and non-composite applications.
Therefore, there is need for a prefabricated metal stud for use in composite and non-composite applications that is light, strong, durable and economically manufactured and can be readily modified depending on the needs of various applications.
BRIEF SUMMARY OF THE INVENTIONThe present invention provides a cold formed stud for use in composite and non-composite applications.
In at least one embodiment, the present invention provides a cold formed metal stud having a vertically extending web, the web having a first longitudinal edge and a second longitudinal edge, a first flange portion vertically extending along the first longitudinal edge, the first flange portion having a vertically extending channel and a second flange portion vertically extending along the second longitudinal edge.
In at least one embodiment, the present invention provides a double stud arrangement wherein two studs are aligned back-to-back in order to provide a stud that is particularly resistant to buckling and twisting.
The present invention also provides a method of forming a composite panel assembly consisting of the steps of pouring a concrete panel and embedding a first flange portion of a cold formed metal stud in the concrete panel, the first flange portion located along a first longitudinal edge of a vertically extending web of the cold formed metal stud such that when the concrete panel solidifies the cold formed metal stud and the concrete panel form a composite panel assembly.
In at least one embodiment, the present invention provides a cold formed stud that can be employed as a ceiling joist. In such applications, the cold formed joist of the present invention can be embedded in a composite ceiling or floor panel.
Preferred embodiments of the present invention will now be described in greater detail and will be better understood when read in conjunction with the following drawings in which:
The cold formed stud of the present invention is contemplated for use in composite and non-composite applications. In composite applications, the cold formed joist can be incorporated directly in a poured concrete wall slab in a manufacturing facility and delivered to the jobsite as a complete assembly for wall erection, among other applications. The composite arrangement provides an integral wall panel and stud assembly that displays excellent strength characteristics, vibration response and load capacity, without unduly stressing the poured concrete wall panel. It is also contemplated that in certain applications, the integral wall panel and stud assembly may be assembled at the jobsite after the cold formed joist has been installed. Composite applications will be discussed in further detail below.
In at least one embodiment, the cold formed stud of the present invention is incorporated in a concrete wall slab as discussed above. However, it is further contemplated that the cold formed stud of present invention can be incorporated in wall slabs formed out of other materials, such as but not limited to fibreglass, polymer resin and other materials that “set” following an initially liquid state, as will be readily understood by the skilled person.
It is contemplated that the cold formed stud of the present invention may also be used as a ceiling joist in particular applications that will be readily recognized by the skilled person. Particularly, the cold formed stud of the present application may be employed in applications wherein the ceiling joist is subjected to relatively lightweight loads. In these applications, the cold formed stud may be embedded in a composite roof or floor panel in a manner that is analogous to the process described above relating to composite wall panels.
The size and thickness of the piece of sheet metal used in manufacturing cold formed stud 10 must be sufficient such that the resulting element has the physical properties required for the intended application, the selection of which will be readily apparent to the skilled person in the art. Cold formed stud 10 can be formed of a variety of metals, such as but not limited to steel, stainless steel, galvanized steel and aluminum. Cold formed stud 10 may be formed in various lengths and widths.
Stud 10 can extend upwardly from any foundation or floor structure, among other construction applications that will be readily apparent to the skilled person. Stud 10 can be attached to the foundational structure by any means that is suitable. Further, the stud can support a roof truss, floor joist or any other structure that will also be apparent to the skilled person. It can also support an exterior wall panel, interior wall panel, window frame, door frame or any other wall arrangement known in the construction industry.
In at least one embodiment, intermediate web 20 includes a number of web openings 22 located along the centre line of the intermediate web 20. Web openings 22 can take a variety of shapes including triangular, square, oval, circular and other shapes that will be readily contemplated by the skilled person. It is important to note however that web openings 22 will provide further stiffness to intermediate web 20 and be less prone to fatigue failure if the corners of web openings 22 are formed with rounded corners rather than sharp corners, as can be seen in
In at least one embodiment, web openings 22 can further include a stiffening rim 24 that extends around the perimeter of web openings 22. Stiffening rim 24 is formed of material displaced from intermediate web 20 when web openings 22 are formed. Stiffening rim 24 can be formed with a semi-circular, arcuate, ovular, or square cross sectional profile among other cross-sectional profiles that will be readily apparent to the skilled person. Stiffening rim 24 may extend discontinuously around the perimeter of web opening 22, however stiffening rim 24 will provide improved stiffness to intermediate web 20 and be less prone to fatigue failure if stiffening rim 24 extends continuously around the perimeter of web openings 22, as can be seen in
In at least one embodiment, intermediate web 20 can further include a series of longitudinally extending stiffening ribs 26, as can be seen in
In at least one embodiment, intermediate web 20 can further include a series of stiffening indentations 28 that can be located in any part of intermediate web 20 that can require additional stiffening, as can be seen in
In at least one embodiment, intermediate web 20 can further include a series of transverse stiffening ribs 29 that can that can be located in any part of intermediate web 20 that can require additional stiffening, as can be seen in
Web openings 22, stiffening rim 24, longitudinally extending stiffening ribs 26, stiffening indentations 28 and transverse stiffening ribs 29 can be formed by any suitable manufacturing processes including stamping, milling and rolling, among other manufacturing processes that will be readily apparent to the skilled person. In addition to providing stiffness to stud 10, these additional features also serve to reduce the heat transfer characteristics of stud 10. By this it is meant that these features reduce the rate at which the stud conducts heat for improved heating or cooling of a space at least partially enclosed by structures that incorporate studs 10.
As discussed above, first flange 30 is formed along one longitudinal edge of intermediate web 20, as seen in
With reference to
As can be seen in
First flange 30, end flange 32 and channel 34 can be formed by any suitable manufacturing process that will be readily apparent to the skilled person. Further, first flange 30, end flange 32 and channel 34 can be formed with any type of bend that suits the application, however radial bends provide a cold formed stud that has the requisite stiffness and fatigue resistance.
In at least one embodiment and as can be seen in
In at least one embodiment and as can be seen in
As can be seen in
As can be seen in
For example and as can be seen in
In at least one embodiment, cold formed stud 10 (which can include the optional features recited above such as web openings 22, stiffening rim 24, longitudinally extending stiffening ribs 26, stiffening indentations 28, transverse stiffening ribs 29, end flange 32, channel 34, perforations 36 and/or indentations 38) can be specifically designed such that the cross sectional area is constant at all locations along cold formed stud 10.
With reference to
With reference to
In at least one embodiment and as can be seen in
In at least one embodiment the two studs are connected by way of a bolt 108, however other fasteners are also contemplated such as welds, rivets, and sheet metal screws among other fasteners that will be readily apparent to the skilled person.
It is contemplated that double stud 100 may also be used as a ceiling joist in particular applications that will be readily recognized by the skilled person. In these applications, double stud 100 may be embedded in a composite roof or floor panel in a manner that is analogous to the process described above relating to composite wall panels.
The above-described embodiments of the present invention are meant to be illustrative of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications, which would be readily apparent to one skilled in the art, are intended to be within the scope of the present invention. The only limitations to the scope of the present invention are set out in the following appended claims.
Claims
1. A cold formed metal stud, the stud comprising:
- a vertically extending web, said web having a first longitudinal edge and a second longitudinal edge;
- a first flange portion vertically extending along said first longitudinal edge, said first flange portion having a vertically extending channel; and,
- a second flange portion vertically extending along said second longitudinal edge.
2. The cold formed metal stud of claim 1, said channel having at least one channel perforation.
3. The cold formed metal stud of claim 1, said channel having at least one channel indentation.
4. The cold formed metal stud of claim 1, said channel having a dovetail shaped cross-sectional profile.
5. The cold formed metal stud of claim 1, wherein said first flange portion is embedded in a poured concrete panel.
6. The cold formed metal stud of claim 1, wherein said second flange portion is embedded in a poured concrete panel.
7. The cold formed metal stud of claim 1, said web further comprising at least one web opening located along the centerline of said web.
8. The cold formed metal stud of claim 7, said at least one web opening being elliptically shaped.
9. The cold formed metal stud of claim 7, said at least one web opening having a stiffening rim extending around the perimeter thereof.
10. The cold formed metal stud of claim 1, said web further comprising at least one longitudinally extending stiffening rib.
11. The cold formed metal stud of claim 10, said stiffening rib being shaped in a zig-zag pattern.
12. The cold formed metal stud of claim 1, said web further comprising at least one indentation.
13. The cold formed metal stud of claim 1, said web further comprising at least one vertical stiffening rib.
14. The cold formed metal stud of claim 1, said first flange further comprising an end flange.
15. The cold formed metal stud of claim 1, said first flange forming an obtuse angle with said web.
16. The cold formed metal stud of claim 1, said first flange forming an acute angle with said web.
17. The cold formed metal stud of claim 1, said second flange forming an obtuse angle with said web.
18. The cold formed metal stud of claim 1, said second flange forming an acute angle with said web.
19. The cold formed metal stud of claim 1, said second flange further comprising a vertically extending second channel.
20. The cold formed metal stud of claim 19, said second channel having a dovetail shaped cross-sectional profile.
21. The cold formed metal stud of claim 19, said second channel having a plurality of channel perforations.
22. The cold formed metal stud of claim 19, said second channel having a plurality of channel indentations.
23. The cold formed metal stud of claim 1, said second flange further comprising an end flange.
24. A method of forming a composite panel assembly, the method comprising the steps of:
- pouring a concrete panel; and,
- embedding a first flange portion of a cold formed metal stud in said concrete panel, said first flange portion located along a first longitudinal edge of a vertically extending web of said cold formed metal stud
- wherein when said concrete panel solidifies said cold formed metal stud and said concrete panel form a composite panel assembly.
25. A method of manufacturing a cold formed metal stud, the method comprising the steps of:
- forming a first flange portion along a first longitudinal edge of a vertically extending web;
- forming a second flange portion along a second longitudinal edge of said vertically extending web; and
- forming a vertically extending channel along said first flange portion.
26. The method of claim 25, the method further comprising the step of:
- forming at least one channel perforation in said vertically extending channel.
27. The method of claim 25, the method further comprising the step of:
- forming at least one channel indentation in said vertically extending channel.
28. The method of claim 25, the method further comprising the step of:
- forming at least one web opening along the centerline of said web.
29. The method of claim 28, wherein said at least one web opening is elliptically shaped.
30. The method of claim 28, the method further comprising the step of:
- forming a stiffening rim around the perimeter of said at least one web opening.
31. The method of claim 25, the method further comprising the step of:
- forming at least one longitudinally extending stiffening rib in said web.
32. The method of claim 25, the method further comprising the step of:
- forming at least one indentation in said web.
33. The method of claim 25 the method further comprising the step of:
- forming an end flange in said first flange portion.
34. The method of claim 25 the method further comprising the step of:
- forming a vertically extending second channel in said second flange portion.
35. The method of claim 34, the method further comprising the step of:
- forming at least one channel perforation in said vertically extending second channel.
36. The method of claim 34, the method further comprising the step of:
- forming at least one channel indentation in said vertically extending second channel.
37. The method of claim 25, further comprising the step of:
- forming an end flange in said second flange portion.
38. The cold formed stud of claim 1, further comprising:
- a second cold formed stud having: a vertically extending web, said web having a first longitudinal edge and a second longitudinal edge; a first flange portion vertically extending along said first longitudinal edge, said first flange portion having a vertically extending channel; and a second flange portion vertically extending along said second longitudinal edge
- wherein said vertically extending web of said cold formed stud abuts said vertically extending web of said second cold formed stud.
39. The cold formed stud of claim 38 wherein at least one of said vertically extending web of said cold formed stud and said vertically extending web of said second cold formed stud further comprises a plurality of vertical stiffening ribs.
40. The cold formed stud of claim 38 wherein said vertically extending web of said cold formed stud is connected to said vertically extending web of said second cold formed stud by way of a fastener.
Type: Application
Filed: Nov 16, 2010
Publication Date: Mar 1, 2012
Applicant: BURNCO MANUFACTURING INC. (Concord)
Inventors: Irving Stal (Toronto), Hormoz Sayyad (Richmond Hill)
Application Number: 12/947,020
International Classification: E04B 1/18 (20060101); B21D 31/00 (20060101); E04B 1/16 (20060101);