US20080250738A1 - Light weight metal framing member - Google Patents
Light weight metal framing member Download PDFInfo
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- US20080250738A1 US20080250738A1 US11/905,431 US90543107A US2008250738A1 US 20080250738 A1 US20080250738 A1 US 20080250738A1 US 90543107 A US90543107 A US 90543107A US 2008250738 A1 US2008250738 A1 US 2008250738A1
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- framing member
- metal
- depressions
- ribs
- stud
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- 239000002184 metal Substances 0.000 title claims abstract description 128
- 238000009432 framing Methods 0.000 title claims abstract description 81
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 54
- 239000000463 material Substances 0.000 claims description 52
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 229910003460 diamond Inorganic materials 0.000 claims description 4
- 239000010432 diamond Substances 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 238000005192 partition Methods 0.000 description 13
- 230000002787 reinforcement Effects 0.000 description 4
- 239000002023 wood Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
- E04B2/76—Removable non-load-bearing partitions; Partitions with a free upper edge with framework or posts of metal
- E04B2/78—Removable non-load-bearing partitions; Partitions with a free upper edge with framework or posts of metal characterised by special cross-section of the frame members as far as important for securing wall panels to a framework with or without the help of cover-strips
- E04B2/7854—Removable non-load-bearing partitions; Partitions with a free upper edge with framework or posts of metal characterised by special cross-section of the frame members as far as important for securing wall panels to a framework with or without the help of cover-strips of open profile
- E04B2/789—Removable non-load-bearing partitions; Partitions with a free upper edge with framework or posts of metal characterised by special cross-section of the frame members as far as important for securing wall panels to a framework with or without the help of cover-strips of open profile of substantially U- or C- section
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C3/06—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with substantially solid, i.e. unapertured, web
- E04C3/07—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with substantially solid, i.e. unapertured, web at least partly of bent or otherwise deformed strip- or sheet-like material
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
- E04C2003/0443—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section
- E04C2003/0473—U- or C-shaped
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The present invention provides for a lightweight metal framing member having a central web and two parallel spaced apart side walls extending upwardly from the sides of the web. The framing member has at least one longitudinally oriented rib extending the length of the web of the framing member to aid in reducing shrinkage and twisting of the framing member when non-symmetrical reinforcing structures are found in the framing member.
Description
- The present invention relates to metal framing members for use in constructing partition walls. In particular, the invention relates to metal studs and tracks for use in partition walls wherein the stud or track is provided with non-symmetrical patterns of structures to stiffen the material utilized in roll forming the metal stud or track and wherein the stud or track is also provided with longitudinally extending ribs to reduce or eliminate the tendency of the metal from which such stud or track is roll formed to shrink and twist.
- It is common practice in residential and many commercial buildings to separate the various rooms by partition walls to define the space of the room. Such partition walls are generally load bearing and have in the past been constructed of wood members including top and bottom plates and bridging studs. The use of wood members has its shortcomings, the supply of lumber is getting scarce, and costs have increased during recent years. In addition, wood can warp and go out of shape when it becomes wet as well as being susceptible to fire damage and attack by vermin of various kinds.
- In recent years, partition walls framed with sheet metal members have been employed. The use of sheet metal members provides advantages of dimensional stability, ease of manufacturing and conservation of natural resources among others. However, the use of sheet metal framing members has not gained widespread acceptance for various reasons. For example, the cost of the materials utilized to form metal studs has been increasing and the price advantages of metal studs over wood studs is decreasing. There have been attempts in the past to reduce the cost of the material utilized to form the metal stud by providing stiffening structures to the metal to allow a thinner and less expensive metal to be used for a particular duty. For example, Swiss Patent CH486281 describes a sheet material having rows of alternating projections and depressions, the rows of the projections and depressions offset such that the projections and depressions alternate along the length of the material. Similarly, Canadian Patent Application No. 2,149,914 describes a stud for use in partition walls where the sheet material to form the stud is provided with projections on opposite surfaces of the material to leave a corresponding depression at the opposite face of the material, the positions of the projections and depressions at each surface of the material being such that lines drawn on the surface of the material between adjacent rows of projections and depressions are not rectilinear. While this arrangement is said to allow the production of studs from a thinner starting material, the manufacturing process required two offset rollers each being provided with projections to form the projections and depressions on opposite sides of the metal sheet.
- In our previously filed application, a lightweight metal framing member having a plurality of depressions and a plurality of reinforcing ribs on the surfaces thereof was described. The depressions and ribs were both inwardly oriented and cooperated to aid in stiffening of the metal framing member. During roll forming production of metal framing member having non-symmetrical reinforcing structures, that is reinforcing structures which do not extend across the entire width of the framing member, a tendency of the studs to twist was observed. It is believed this is due to uneven shrinkage in the length of the member across its width caused by the localized shrinkage of the metal as a result of the formation of the reinforcing structures in only a portion of the width of the metal from which the metal framing member is formed. While the twisting does not affect the structural integrity of the metal framing member, it does detract from the appearance of the stud and makes the storage and installation of the metal framing member more difficult.
- There still remains a need for a lightweight metal framing member which overcomes the disadvantages of the prior art.
- The present invention provides for a lightweight metal framing member having a central web and two parallel spaced apart side walls extending upwardly from the sides of the web. The framing member has at least one longitudinally oriented rib extending the length of the web of the framing member to aid in reducing shrinkage and twisting of the framing member when non-symmetrical reinforcing structures which do not extend across the width of the framing member are formed in the framing member.
- In an aspect of the present invention, the metal framing member is provided with a plurality of inwardly oriented depressions on the surfaces of the framing member to aid in stiffening of the metal framing member and enhance screw tip capture. Each of the depressions are formed with clearly defined edges to enhance screw tip capture of a screw entering the depression irrespective of the angle of entry into the depression of the screw tip.
- In another aspect of the invention, the framing member is provided with a plurality of non-symmetrical reinforcing ribs in the web of the framing member, the non-symmetrical reinforcing ribs being inwardly oriented and cooperating with the depressions to significantly aid in stiffening of the metal framing member.
- In another aspect of the invention, the metal framing member is a stud having a generally rectangular C shaped cross section with two parallel spaced apart side walls and a central web bridging the side walls with the side walls terminating in intumed flanges or ledges. Each of the side walls, ledges and central web are provided with the plurality of depressions and the web is provided with the longitudinaly extending rib and non-symmetrical reinforcing ribs.
- In another aspect of the invention, the metal framing member is a track having a generally rectangular U shaped cross section with two parallel spaced apart side walls and a central web bridging the side walls. Each of the side walls and central web are provided with the plurality of depressions and the web is provided with the longitudinaly extending rib and a plurality of non-symmetrical reinforcing ribs.
- In another aspect of the invention, the central web bridging the side walls is in the form of a main central section bordered by raised narrow channel shaped edge ribs.
- In another aspect of the invention, each of the depressions has a depth about 2 to 4 times the thickness of the metal from which the framing member is formed.
- In another aspect of the invention, each of the depressions are round or knurled and have a diameter of about 0.10 inches.
- In another aspect of the invention, the depressions are provided as a series of rows across the surface of the metal framing member.
- In another aspect of the invention, the rows of depressions are offset from each other so that the depressions form a diamond pattern on the surface of the sheet material such that the rows can be moved closer together, increasing the number of depressions for reinforcement and screw attachment.
- In another aspect of the invention, the spacing between the rows of depressions is about 0.10 inches and the spacing between the depressions in each row is about 0.20 inches.
- In another aspect of the invention, the non-symmetrical reinforcing ribs on the web of the metal framing member, are arranged diagonally across at least one half of the width of the web.
- In another aspect of the invention, there is provided a method of manufacturing a metal framing member having a longitudinally extending rib along the web, and a plurality of non-symmetrical reinforcing structures on the surface thereof, the non-symmetrical reinforcing structures being inwardly oriented and aiding in stiffening of the metal framing member. The method comprises passing a suitably dimensioned sheet material through a cold roll forming apparatus having a first roller with a circumferential projection on its surface to press into the sheet metal material and form the longitudinally extending rib on the surface of the material and a second roller having a groove corresponding to the projection of the first roller. The sheet material is then passed through a second roll forming apparatus having a first roller with a pluarality of projections on its surface to form the non-symmetrical reinforcing structures in the surface of the sheet material and a second roller having a surface to allow for a softer transition between the surface of the sheet material and the edges of the non-symmetrical reinforcing structures. The sheet material is then passed through a third roll forming apparatus having rollers to form the metal framing member.
- In another aspect of the invention, the method of manufacturing the metal framing member includes the additional step of providing a plurality of inwardly oriented depressions on the surface of the metal framing member. The plurality of inwardly oriented depressions are formed in a step before the formation of the longitudinally extending rib by passing the sheet material through a roll forming apparatus having a first roller with a plurality of projections on its surface and a second roller having holes aligned with the projections of the surface of the first roller to form depressions with clearly defined edges in the surface of the sheet material.
- In another aspect of the invention, the sheet material after having the longitudinally extending ribs and non-symmetrical reinforcing structures placed therein, is passed through an additional roll forming apparatus to form the final metal framing member.
- Preferred embodiments of the invention are illustrated in the attached drawings in which:
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FIG. 1 is a perspective view of a wall constructed utilizing a preferred embodiment of the lightweight metal stud and track of the present invention being used to frame a partition wall; -
FIG. 2 is a perspective view of a preferred embodiment of a lightweight metal stud of the present invention; -
FIG. 3 is a perspective view illustrating the capture of a screw tip by the depression on the surface of the metal stud or track; -
FIG. 4 is a cross section view illustrating the capture of a screw tip by the depression on the surface of the metal stud or track; and -
FIG. 5 is perspective view of a preferred embodiment of a lightweight metal track of the present invention; and -
FIG. 6 is a side elevation view in cross-section of the lightweight metal stud ofFIG. 2 with the depressions, longitudinally extending ribs and non-symmetrical reinforcing ribs formed therein. - The present invention is directed to metal framing members such as
metal studs 10 andtracks 12 utilized inframing partition walls 14 as illustrated inFIG. 1 . Thepartition walls 14 are framed from ametal track 12 forming thetop plates 12 a andbottom plates 12 b that are bridged by the parallel spaced apartmetal studs 10. The spacing between themetal studs 10 is that typically utilized in construction of walls generally at 16 inches on center although other spacing such as 24 inches on center may be utilized. Thestuds 10 are attached to thetop plate 12 a andbottom plate 12 b through the use ofsuitable screws 16. Once thepartition wall 14 is framed utilizing thestuds 10,top plate 12 a andbottom plate 12 b, a suitable wall covering material such aswall board 18 is attached to the partition wall utilizingsuitable screws 20. - As illustrated in
FIGS. 2 , themetal stud 10 has a generally C-shaped rectangular cross-section with two parallel spacedapart side walls 22 and acentral web 24 bridging theside walls 22. Theside walls 22 terminate in inwardly turned ledges 26. Thecentral web 24 has a maincentral section 24 a bordered by channelshaped ribs 24 b extending longitudinally of thestud 10. Thelongitudinal ribs 24 b extend outwardly of the central web of thestud 10 and aid in stiffening of thecentral web 24 of thestud 10. - The surface of the metal sheet from which the
metal stud 10 ortracks 12 is formed is provided with a plurality of reinforcing structures to aid in stiffening of the metal from which the stud or track is formed. In one embodiment, the plurality of reinforcing structures includedepressions 28 formed therein. The depressions may be provided non-symmetrically, on only selected surfaces of the stud such as the flanges. Preferably, thestud 10 is provided with thedepressions 28 across the entire surface of the metal from which the stud is manufactured. As illustrated inFIGS. 3 and 4 , thedepressions 28 also aid in preventing slipping of ascrew 20 as it is being driven into themetal stud 10 ortrack 12 irrespective of the direction in which the screw tip enters thedepression 28. Typically as ascrew 20 is being driven into the flange orside wall 22 of astud 10 ortrack 12, the pressure of the screw tip tends to deflect the sidewall, allowing the screw tip to slip along the surface. As illustrated inFIGS. 3 and 4 , the shaping and dimensions of thedepressions 28 capture the screw tip, even when thesidewall 22 is deforming and significantly reduces or elimates the possibility of screw tip slippage. - In addition to the
depressions 28, the metal from which thestud 10 ortrack 12 is formed is also preferably provided with a plurality of other non-symmetrical reinforcing structures. The term non-symmetrical reinforcing structure refers to reinforcing structures which do not extend the entire width of the framing member, but rather are only placed within a portion of the width of the surface of the framing member. In the embodiment illustrated, these structures are reinforcing projections such asribs 30 which extend across at least a portion of the sheet from which the web of the framing member will be formed to further aid in stiffening of the material from which thestud 10 ortrack 12 is formed. Thestud 10 illustrated inFIG. 2 has theribs 30 arranged in an interrupted herringbone or chevron pattern, however, other patterns of the ribs such as a crossed diagonal or quilted pattern are also possible. - In this embodiment the
ribs 30 are provided as chevron shapes and are formed only within the maincentral section 24 a of thecentral web 24. Theribs 30 do not extend into either the channel shapedribs 24 b nor thesidewalls 22 and inwardly turnedledges 26. Thesidewalls 22 of this embodiment of thestud 10 are provided with longitudinally extendingribs 29 which are inwardly directed to aid in stiffening of thesidewall 22. - The
stud 10 is provided with longitudinally extendingribs 31 in the maincentral section 24 a of thecentral web 24. These longitudinally extendingribs 31 are formed in thestud 10 prior to the formation of the non-symmetrical reinforcing structures such as theribs 30. In this embodiment of thestud 10 theribs 30 are in a general Chevron shape. However they are separated into three sections,sections longitudinally extending rib 31. The non-symmetrical reinforcing structures do not extend into the longitudinally extending ribs in order that the longitudinally extending rib will hold the metal as the non-symmetrical reinforcing structures are being stretched into the material. As explained below, other patterns of theribs 30 other than those illustrated may also be utilized. - The number and placement of the
longitudinally extending ribs 31 in the maincentral section 24 a is selected based on the completed size of the stud. For example a 1⅝″ stud may be provided with one suchlongitudinally extending rib 31, a 2½″ stud may be provided with either one or two such ribs. As illustrated inFIG. 4 preferably a 3⅝″ or 4″ stud is provided with two such ribs while a 6″ or 8″ stud would be provided with three or four such ribs. - Each of the
depressions 28, thenon-symmetrical reinforcing ribs 30 and thelongitudinly extending ribs 29 in the sidewalls are formed on the same surface of the material from which thestud 10 ortrack 12 is to be formed such that thedepressions 28,longitudinly extending ribs 29 and reinforcingribs 30 are oriented to the inside of the formedmetal stud 10 ortrack 12. In this way, thedepressions 28 and longitudinally extendingribs 29 andnon-symmetrical reinforcing ribs 30 do not interfere with the placing of themetal stud 10 within the top 12 a andbottom plates 12 b nor do they interfere with the placement of the coveringmaterials 18 on the formedwalls 14. An additional benefit of the provision of thedepressions 28 on both thestud 10 andtrack 12 is that as thestud 10 is placed within thetrack 12, thedepressions 28 of thestud 10 andtrack 12 interlock to help hold thestud 10 in the desired location within thetrack 12 during the framing of thepartition walls 14. -
FIG. 5 illustrates atypical track 12 of the present invention which is utilized as atop track 12 a orbottom track 12 b in forming apartition wall 14.Track 12 has a generally rectangular U shape with two parallel spaced apartside walls 32 and acentral web 34 bridging theside walls 32. Similar to thestud 10, thetrack 12 is provided with a plurality ofdepressions 28 formed therein to aid in stiffening of the metal from which thetrack 12 is formed. In addition to thedepressions 28, the metal from which thetrack 12 is formed is also provided with a plurality of non-symmetrical reinforcing projections such asribs 30 which extend across a portion of thecentral web 34 to further aid in stiffening of the material from which thetrack 12 is formed. Preferably, theribs 30 are centrally located in thecentral web 34 and have a length of about 1 to 2 inches. As explained further below, theribs 30 may also be utilized for indexing of the track length for ease of cutting thetrack 12 in the field to the desired length as well as for placement of thestuds 10 at the proper spacing within thetrack 12. By providing theribs 30 across only a portion of thecentral web 34 of thetrack 12, theribs 30 do not interfere with the placement of thestuds 10 within thetrack 12. - The processing of the metal sheet from which the
stud 10 ortrack 12 is to be constructed will now be described. A metal sheet of a suitable thickness is passed through a cold roll forming apparatus having a first roller with a plurality of projections on its surface to press into the sheet metal material and form thedepressions 28 in the surface of the material. The second roller of this roll forming apparatus has a surface provided with holes aligned with the projections on the surface of the first roller. In this way, thedepressions 28 being formed by the rollers having aligned projections and holes have clearly defined edges 48 generally aligned with the plane of the metal sheet. This is illustrated in detail inFIG. 6 where it is shown that the edges 48 between the surface of the sheet material and thedepressions 28 are clearly defined sharp corners. The provision of the clearly defined edges 48 generally aligned with the plane of the metal sheet allows a screw tip to be captured in thedepression 28 at all angles and reduces or virtually eliminates any slipping of ascrew - The number, size, spacing and shape of the
depressions 28 is selected to provide the desired reinforcement to the sheet material from which the stud or track will be formed. Preferably, as illustrated in the figures, thedepressions 28 are provided as a series of rows offset from each other so that thedepressions 28 form a diamond pattern on the surface of the sheet material. By offsetting the rows ofdepressions 28, thedepressions 28 can be placed closer together, providing a larger number ofdepressions 28 on the metal sheet 38 increasing the reinforcement of the metal sheet 38 as well as further reducing the possibility of screw tip slippage. The spacing between the rows ofdepressions 28 is typically on the order of about 0.10 inches and thedepressions 28 are spaced apart in the row about 0.20 inches. Thus, thedepressions 28 adjacent each other in adjacent rows would be spaced apart about 0.144 inches. While these dimensions are preferred, variations of the dimensions may be used. While various shapes of the depressions can be selected such as circular, oval or diamond, preferably, each of thedepressions 28 is circular in shape having a diameter of approximately 0.10 inches and a depth of approximately 0.03 to 0.06 inches deep, preferably about 0.04 to 0.05 inches deep. For a typical metal sheet 38, this results in the projections on the opposite side of the metal sheet 38 having a thickness of approximately 2-4 times the thickness of the metal sheet material. - After the
depressions 28 are formed in the metal sheet, the metal sheet is passed through a second roll forming apparatus to form thelongitudinally extending ribs 31. This roll forming apparatus is provided with a first roller having a circumferential projection to form thelongitudinally extending rib 31. The second roller has a circumferential groove aligned with the circumferential projection of the first roller to form theribs 31. In the embodiments illustrated, reinforcingrib 31 projects to the opposited side of the metal sheet as thedepressions 28, however, reinforcingrib 31 may also be formed to project to the same side of the metal sheet as thedepression 28. - Once the
depressions 28 and longitudingly extendingribs 31 are formed in the metal sheet material, the metal sheet material is then passed through a third roll forming apparatus having a first roller with projections on its surface to form the reinforcingribs 30 in the surface of the sheet material. This second apparatus also has a second roller which allows for a softer transition between the surface of the sheet material and the edges of the reinforcingribs 30. The second roller could be provided with an enlarged opening to allow for air bending of therib 30 or it could be provided with a compressible surface such as polyurethane. The use of such a second roller provides that the reinforcing ribs are not deformed and also that any of thedepressions 28, especially those which are within theribs 30 are not unduly deformed or flattened out as would be the case if the second roller was a hard material. Rather thedepressions 28 remain generally intact within the interior of the reinforcingrib 30. This provides for further reinforcement to the metal sheet material 38 as well as retaining the screw gripping property of thedepressions 28 within therib 30. Preferably, to fully retain the screw gripping property of therib 30, the rollers of the second apparatus are oriented such that a row ofscrew gripping depressions 28 will be present and formed in the apex of everyrib 30. - As illustrated in the figures, preferably the
ribs 30 have a width approximately 0.20 to 0.3 inches wide, preferably about 0.25 inches wide and a depth approximately 0.05 to 0.15 inches deep preferably about 0.1 inches deep. - Once the sheet material 38 has been passed through the roll forming apparatus to form the
depressions 28 and reinforcingribs 30 in the surface, it is then passed through the typical roll forming apparatus to form the final C-channel shape of themetal stud 10 or U-channel shape of thetrack 12. During this operation, thelongitudinally extending ribs 29 are formed in the flange of the stud if desired. - While in the preferred embodiment illustrated, the reinforcing
ribs 30 are a herringbone or chevron shape, other shapes of reinforcingribs 30 may also be provided which will provide for the required stiffening of the sheet material 38. For thetrack 12, preferably theribs 30 extend horizontally across only a portion of the surface of the material 38 from which thecentral web 34 of thetrack 12 is formed and do not extend to thesidewalls 32. The absence ofribs 30 adjacent to thesidewalls 32 of thetrack 12 allows for a better fit between thestud 10 andtrack 12 and better interlock of the stud and trackdepressions 28. By providing onlydepressions 28 in the vertically oriented sidewalls 32 of thetrack 12, thestud 10 andtrack 12 will interlock on assembly and thedepressions 28 on thestud 10 andtrack 12 being equally spaced will also interlock providing free standing stud location until thescrews 16 are applied to firmly join thestud 10 andtrack 12. In addition, by the proper spacing of theribs 30, theribs 30 may also be utilized for indexing of the track length for ease of cutting thetrack 12 in the field to the desired length as well as for placement of thestuds 10 at the proper spacing within thetrack 12. For example, theribs 30 could be provided every 1 inch along the length of thetrack 12 to provide a built in indexing ruler for the track. In addition, the length of theribs 30 on the track may vary to provide an additional indexing. As the spacing of studs is generally either 16 or 24 inches on center, every fourth rib could be of a different length. For example, with ribs spaced every inch along the track, every fourth rib could be shorter than the other ribs to provide a 4 inch measure along the track. Alternatively, every fourth rib could be larger than the other rib. - The metal framing members of the present invention provide for a metal stud and track having increased strength compared to metal studs and tracks made from plain sheet material of the same thickness. In addition, the provision of the depressions on the surface of the metal framing member as well as the shaping of the depressions allows for capture of the tip of the screw as it is being driven through the metal framing member reducing the likelihood of the screw slipping along the surface of the metal framing member irrespective of angle at which the screw tip encounters the sidewall as a result of the sidewall deflection during assembly causing an angular intersection between the screw tip and the sidewall.
- The provision of the longitudinally extending ribs in the web of the metal framing member such as a stud or track aids in reducing or eliminating the tendancy of the metal from which the metal framing member is formed to shrink locally as non-symmetrical reinforcing structures are being formed in the metal framing member. The shrinkage of the length of the metal as a result of the displacement of the metal into the non-symmetrical reinforcing structures gives rise to a tendancy of the metal framing member to become twisted. By providing the longitudinally extending ribs prior to the forming of the non-symmetrical reinforcing structures, the metal is not able to shrink locally causing a non-even shrinkage in length of the framing member. Rather, the reinforcing structures are instead stretched into the material. The material is held in place by the longitudinally extending ribs, thus maintaining the dimensional stability of the metal and reducing or eliminating the tendancy of the metal framing member to have localized shrinkage and become twisted.
- Although various preferred embodiments of the present invention have been described herein in detail, it will be appreciated by those skilled in the art that variations may be made thereto without departing from the spirit of the invention or scope of the appended claims.
Claims (20)
1. A lightweight metal framing member formed from a sheet of metal having a plurality of non-symmetrical reinforcing structures on the surface thereof, the framing member having at least one longitudinally oriented rib extending the length of the framing member to aid in reducing localized shrinkage of the framing member at the non-symmetrical reinforcing structures.
2. A lightweight metal framing member according to claim 1 wherein the framing member is provided with a plurality of inwardly oriented depressions on the surfaces of the framing member to aid in stiffening of the metal framing member and enhance screw tip capture.
3. A lightweight metal framing member according to claim 2 , wherein each of the depressions has a depth about 2 to 4 times the thickness of the metal from which the framing member is formed.
4. A lightweight metal framing member according to claim 3 , wherein each of the depressions is round or knurled and has a diameter of about 0.10 inches.
5. A lightweight metal framing member according to claim 4 , wherein the depressions are provided as a series of rows across the surface of the metal sheet from which the framing member was formed.
6. A lightweight metal framing member according to claim 6 , wherein the rows of depressions are offset from each other so that the depressions form a diamond pattern on the surface of the sheet material from which the framing member was formed and may be located closer together.
7. A lightweight metal framing member according to claim 7 , wherein the spacing between the rows of depressions is about 0.10 inches and the spacing between the depressions in each row is about 0.20 inches.
8. A lightweight metal framing member according to claim 7 , wherein the metal framing member is a metal stud having a generally rectangular C shaped cross section with two parallel spaced apart side walls and a central web bridging the side walls, said side walls terminating in inturned ledges, the longitudinally extending ribs being provided in the web of the stud.
9. A lightweight metal stud according to claim 8 wherein the stud is provided with rows of non-symmetrical reinforcing ribs extending across a portion of the web thereof, the ribs being inwardly oriented and cooperating to stiffen said metal stud.
10. A lightweight metal stud according to claim 9 , wherein the web is provided with a plurality of non-symmetrical reinforcing ribs arranged across at least one half of the width of the web.
11. A lightweight metal stud according to claim 10 , wherein the ribs have a width of about 0.20 to 0.3 inches wide, and a depth of about 0.05 to 0.15 inches deep.
12. A lightweight metal stud as claimed in claim 11 in which said central web comprises a main central section bordered by channel shaped ribs extending longitudinally of said stud, said longitudinal channel shaped ribs projecting beyond said main central web section in a direction opposite to the inwardly oriented rows of reinforcing ribs and projections.
13. A lightweight metal stud according to claim 12 wherein the ribs are arranged diagonally across the main central section of the web.
14. A lightweight metal stud according to claim 14 wherein said reinforcing ribs have a herringbone or quilted pattern.
15. A lightweight metal framing member according to claim 7 , wherein the metal framing member is a metal track having a generally rectangular U shaped cross section with two parallel spaced apart side walls and a central web bridging the side walls.
16. A lightweight metal track according to claim 15 wherein the track is provided with rows of non-symmetrical reinforcing ribs extending across a portion of the web thereof, the ribs being inwardly oriented and cooperating to stiffen said metal stud.
17. A lightweight metal track according to claim 16 , wherein the ribs have a width of about 0.20 to 0.3 inches wide, and a depth of about 0.05 to 0.15 inches deep.
18. A lightweight metal track according to claim 17 wherein the ribs are arranged horizontally across a central section of the web.
19. A method of manufacturing a metal framing member having a longitudinally extending rib along the web, and a plurality of non-symmetrical reinforcing structures on the surface thereof, the non-symmetrical reinforcing structures being inwardly oriented and aiding in stiffening of the metal framing member, the method comprises passing a suitably dimensioned sheet material through a cold roll forming apparatus having a first roller with a circumferential projection on its surface to press into the sheet metal material and form the longitudinally extending rib on the surface of the material and a second roller having a groove corresponding to the projection of the first roller, passing the sheet material through a second roll forming apparatus having a first roller with a pluarality of projections on its surface to form the non-symmetrical reinforcing structures in the surface of the sheet material and a second roller having a surface to allow for a softer transition between the surface of the sheet material and the edges of the non-symmetrical reinforcing structures, and passing the sheet material through a third roll forming apparatus having rollers to form the metal framing member
20. The method of manufacturing the metal framing member according to claim 19 which includes the additional step of providing a plurality of inwardly oriented depressions on the surface of the metal framing member, the plurality of inwardly oriented depressions being formed in a step before the formation of the longitudinally extending rib by passing the sheet material through a roll forming apparatus having a first roller with a plurality of projections on its surface and a second roller having holes aligned with the projections of the surface of the first roller to form depressions with clearly defined edges in the surface of the sheet material.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2584677A CA2584677C (en) | 2007-04-13 | 2007-04-13 | Light weight metal framing member |
CA2584677 | 2007-04-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20080250738A1 true US20080250738A1 (en) | 2008-10-16 |
Family
ID=39852460
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/905,431 Abandoned US20080250738A1 (en) | 2007-04-13 | 2007-10-01 | Light weight metal framing member |
Country Status (2)
Country | Link |
---|---|
US (1) | US20080250738A1 (en) |
CA (1) | CA2584677C (en) |
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CA2584677C (en) | 2014-04-01 |
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Owner name: BALLEY METAL PRODUCTS LIMITED, CANADA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HOWCHIN, ROBERT;REEL/FRAME:019956/0538 Effective date: 20070413 |
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