PARTITION STUD
A metal stud comprising a web and flanges extending perpendicularly from respective edges of the web and each having a stiffening return, the web comprising a longitudinal rib at each edge thereof, each rib having a width of 0.250″ from a respective edge of the web and a depth of 0.060″ from a baseline of the web.
This application claims benefit of U.S. provisional application Ser. No. 62/256,326, filed on Nov. 17, 2015. All documents above are incorporated herein in their entirety by reference.
FIELD OF THE INVENTIONThe present invention relates to partition studs. More specifically, the present invention is concerned with metallic partition studs.
BACKGROUND OF THE INVENTIONStuds are vertical framing members used in building walls. In the case of inner walls, referred to as partition walls, the studs typically hold in place doors and interior finish. As shown in
In North America, studs were traditionally made of wood, usually 2″×4″ or 2″×6″ dimensional lumbers and typically placed 16 inches (406 mm) from each other's center, but sometimes also at 12 inches (305 mm) or 24 inches (610 mm). The wood needs to be dry when used or problems may occur as the studs shrink and twist as they dry out.
Metallic studs, such as steel studs, are gaining popularity, especially for non-load-bearing walls, and are required in some firewalls. A metal stud is formed from a sheet of metal, preferably between about 0.015 and about 0.040 inches in thickness, which is folded into a C-shape cross section to provide a central web 16 disposed perpendicular to the general plane of the partition (P), and a pair of L-shaped flanges 12 extending perpendicularly from the two respective edges of the web 16 and having a stiffening return 14 extending perpendicularly inwardly from the edge of each flange 12 opposite to the edge thereof joining the web 16 (see
The stiffness or stability of a resulting partition is a function of many factors in the stud design and the partition design.
Since the early 50s′, efforts have been made so as to increase resistance of the metal studs to compressive load for example. Thus for instance, wider returns 14 have been used, but their width is limited by buckling of the metal forming the stud. Strengthening has been increased by stamping or knurling the outer surface of the flanges 12 and/or of the web 16. Selecting harder steels and/or increasing the thickness of the metal allow achieving stronger studs but make it more difficult to screw or nail therethrough and may result in more expansive and/or heavier studs.
There is still a need in the art for metal studs.
SUMMARY OF THE INVENTIONMore specifically, in accordance with the present invention, there is provided a metal stud comprising a web and flanges extending perpendicularly from respective edges of the web and each having a stiffening return, the web comprising a longitudinal rib at each edge thereof, each rib having a width of 0.250″ from a respective edge of the web and a depth of 0.060″ from a baseline of the web.
There is further provided a method for making a metal stud from a sheet of metal, comprising forming a longitudinal rib at each edge of the sheet, and folding the sheet into a general C-shape section, with a central web connected at each edge thereof to a flange and provided with a longitudinal rib at each edge of the central web.
There is further provided a method for reinforcing a metal stud comprising a web and flanges extending perpendicularly from respective edges of the web, the method comprising providing a longitudinal rib at each edge of the web, each rib having a width of 0.250″ from a respective edge of the web and a depth of 0.060″ from a baseline of the web.
Other objects, advantages and features of the present invention will become more apparent upon reading of the following non-restrictive description of specific embodiments thereof, given by way of example only with reference to the accompanying drawings.
In the appended drawings:
Studs according to embodiments of aspects of the present invention are shown for example in
The partition studs 10, 10′, 10″, 10′″ and 10″″ have a general C-shape section, with a web 16 and a pair of L-shaped flanges 12 each having a return 14 at a free end thereof. Connection between each flange 14 and the web 16 is done with a radius of curvature R.
As illustrated in
As best seen in
As illustrated in
A steel with a yield strength of at least 33 ksi is selected For example, a galvanised steel having a yield strength of 50 ksi was used with a thickness of 0.021″, and a galvanised steel having a yield strength of 33 ksi with a thickness of 0.0017′ was used.
In
A coating on the steel may be used for anticorrosion purposes as known in the art.
A specific combination of rib geometry and position of the ribs 18 is found to enhance the compressive strength of the resulting stud and hence the limiting partition heights permitted using them, as follows:
Yield strength of 33 ksi or 50 ksi with a thickness of 0.017″ or 0.021″ respectively.
Stud width W (inside dimensions): 1⅝″, 2½″, 3⅝″, 4″ and 6″.
Flange size Wf: 1″¼.
Return size: Wr: ¼″.
Tests were performed on composite wall assemblies comprising 0.017″ and 0.021″ thick cold-formed steel studs of the present invention and ⅝″ thick type X gypsum wallboards (P), following the requirements of ICC AC86-12, Acceptance Criteria for Cold Formed Steel Framing Members-Interior Nonload-bearing Wall Assemblies, so as to establish limiting height tables for this type of composite wall assembly.
There is thus provided an ingenious metal stud formed from a metal sheet folded into a C-shape cross section, of standard overall dimensions, combining a central web and flanges extending perpendicularly from the two respective edges of the web and each having a stiffening return, the central web comprising a longitudinal rib at each edge thereof, each rib having a width of 0.250″ from the edge of the web and a depth of 0.060″ from the baseline of the web.
There is provided a method for reinforcing a metal stud, comprising providing the central web thereof with a rib running longitudinally along each edge thereof, each rib having a width of 0.250″ from the edge of the web and a depth of 0.060″ from the baseline of the web.
The scope of the claims should not be limited by the embodiments set forth in the examples, but should be given the broadest interpretation consistent with the description as a whole.
Claims
1. A metal stud, comprising a web and flanges extending perpendicularly from respective edges of the web and each having a stiffening return, the web comprising a longitudinal rib at each edge thereof, each rib having a width of 0.250″ from a respective edge of the web and a depth of 0.060″ from a baseline of the web.
2. The metal stud of claim 1, formed from a metal sheet.
3. The metal stud of claim 1, formed from a sheet of a metal having a yield strengths of 33 ksi or 50 ksi with a thickness of 0.017″ or 0.021″ respectively.
4. The metal stud of claim 1, formed from a sheet of a material having a yield strength of 33 ksi or 50 ksi with a thickness of 0.017″ or 0.021″ respectively, wherein said flanges have a width of 1″¼ and said returns have a width of ¼″.
5. The metal stud of claim 1, formed from a sheet of a material having a yield strength of 33 ksi or 50 ksi with a thickness of 0.017″ or 0.021″ respectively, wherein said material is a steel.
6. The metal stud of claim 1, formed from a sheet of a material having a yield strength of 33 ksi or 50 ksi with a thickness of 0.017″ or 0.021″ respectively, wherein said material is a steel comprising an anticorrosion coating.
7. The metal stud of claim 1, said web having a width of 1.625′″, 2.500′″, 3.625′″, 4.000′″ or 6.000′″.
8. The metal stud of claim 1, formed from a sheet of a material having a yield strength of 33 ksi or 50 ksi with a thickness of 0.017″ or 0.021″ respectively, wherein said flanges have a width of 1″¼, said returns have a width of ¼″ and a radius of curvature at a junction between the web and each flange is 0.040″.
9. The metal stud of claim 1, wherein a connecting angle between each rib and the baseline of the web is about 45 degrees.
10. The metal stud of claim 1, wherein the flanges are provided with knurling.
11. A method for making a metal stud from a sheet of metal, comprising forming a longitudinal rib at each edge of the sheet, and folding the sheet into a general-shape section, with a central web connected at each edge thereof to a flange, and provided with a longitudinal rib at each edge of the central web.
12. A method for reinforcing a metal stud comprising a web and flanges extending perpendicularly from respective edges of the web, said method comprising providing a longitudinal rib at each edge of the web, each rib having a width of 0.250″ from a respective edge of the web and a depth of 0.060″ from a baseline of the web.
Type: Application
Filed: Oct 3, 2016
Publication Date: May 18, 2017
Inventor: ROBERT LÉONARD (ST-MATHIEU-DE-BELOEIL)
Application Number: 15/283,518