WO2022167834A1 - Improved roll-formed structural member - Google Patents
Improved roll-formed structural member Download PDFInfo
- Publication number
- WO2022167834A1 WO2022167834A1 PCT/IB2021/050846 IB2021050846W WO2022167834A1 WO 2022167834 A1 WO2022167834 A1 WO 2022167834A1 IB 2021050846 W IB2021050846 W IB 2021050846W WO 2022167834 A1 WO2022167834 A1 WO 2022167834A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- elongate
- structural member
- roll
- formed structural
- recessed region
- Prior art date
Links
- 230000003014 reinforcing effect Effects 0.000 claims description 89
- 230000002787 reinforcement Effects 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 238000005452 bending Methods 0.000 claims description 6
- 238000007373 indentation Methods 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 230000003466 anti-cipated effect Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000011068 loading method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000009432 framing Methods 0.000 description 2
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000009408 flooring Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/095—U-or channel sections
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D47/00—Making rigid structural elements or units, e.g. honeycomb structures
- B21D47/01—Making rigid structural elements or units, e.g. honeycomb structures beams or pillars
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/02—Structures consisting primarily of load-supporting, block-shaped, or slab-shaped elements
- E04B1/08—Structures consisting primarily of load-supporting, block-shaped, or slab-shaped elements the elements consisting of metal
-
- 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
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
- E04B5/10—Load-carrying floor structures formed substantially of prefabricated units with metal beams or girders, e.g. with steel lattice girders
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/08—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of metal, e.g. sheet metal
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
- E04C2/34—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/19—Three-dimensional framework structures
- E04B2001/1924—Struts specially adapted therefor
- E04B2001/1936—Winged profiles, e.g. with a L-, T-, U- or X-shaped cross section
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
- E04B2001/2415—Brackets, gussets, joining plates
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B2001/2466—Details of the elongated load-supporting parts
- E04B2001/2472—Elongated load-supporting part formed from a number of parallel profiles
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B2001/2487—Portico type structures
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B2001/249—Structures with a sloping roof
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
- E04C2/34—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts
- E04C2002/3488—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts spaced apart by frame like structures
-
- 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
- E04C2003/0408—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 assembly or the cross-section
- E04C2003/0413—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 assembly or the cross-section being built up from several parts
-
- 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
- E04C2003/0426—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 material distribution in cross section
- E04C2003/043—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 material distribution in cross section the hollow cross-section comprising at least one enclosed cavity
-
- 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
- E04C2003/0465—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 square- or rectangular-shaped
-
- 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
- E04C3/08—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with apertured web, e.g. with a web consisting of bar-like components; Honeycomb girders
- E04C3/09—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with apertured web, e.g. with a web consisting of bar-like components; Honeycomb girders at least partly of bent or otherwise deformed strip- or sheet-like material
Definitions
- the present invention relates to an improved roll-formed structural member. More particularly, but not exclusively, it relates to an elongate roll-formed structural member which can be reinforced.
- Roll-formed structural members are known to be a versatile building component with many advantageous properties. Roll-formed structural members are usually formed by bending one or more metal sheets into a desired profile using rollers. The resulting hollow structural member is quick and simple to install, light weight, durable in many environments, provides straight beams and can be easily manufactured to the required width, depth and length dimensions.
- the invention broadly comprises an elongate roll- formed structural member comprising: a pair of generally C-shaped channel elements nested together, the pair of generally C-shaped channel elements forming a body having a substantially rectangular cross-section profile, the body comprising: first and second flanges substantially parallel and spaced apart at a top and bottom of the body respectively, and first and second web portions separating the first and second flanges, the first and second web portions being substantially parallel and spaced apart at sides respectively, and wherein the first and second web portions at one or both of the top and/or bottom of the body narrow towards each other and defines a recessed region.
- the flange adjacent the recessed region has a flange width less than a width of the space between the first and second web portions.
- the flange adjacent the recessed region has a flange width at least less than the widest space between the first and second web portions.
- the recessed region is at the uppermost or lowermost ends of the body.
- the member further comprises one or more external elongate reinforcing elements configured to be coupled onto the recessed region(s) of the elongate roll-formed structural member.
- the external reinforcing element(s) coupled onto the recessed region(s) results in a box-section in which the external reinforcing element(s) lie within a general rectangular profile or envelope.
- the recessed region comprises a recess width between one and five times a wall thickness of the elongate external reinforcing element.
- the recessed region comprises a recess width between one and three times the wall thickness of the elongate external reinforcing element.
- the elongate external reinforcing element(s) coupled to the recessed region form a wall thickness between two and six times a wall thickness of the web portions without reinforcement.
- the elongate external reinforcing element(s) coupled to the recessed region form a wall thickness between three and five times the wall thickness of the web portions without reinforcement.
- the member further comprises fasteners to couple the external elongate reinforcing element onto the body, the fasteners being one or a combination of screws, rivets, bolts, adhesives, welds.
- each elongate external reinforcing element comprises a C-shaped cross-section having a flange-corresponding portion and two webcorresponding portions depending from the flange-corresponding portion.
- the two web-corresponding portions of an outermost external elongate reinforcing element do not protrude outward past the widest region of the web portions.
- the elongate external reinforcing element comprises a cross-sectional profile to fit over a corresponding recessed region of the body.
- the elongate external reinforcing element extends along a full length of the elongate roll-formed member.
- the elongate external reinforcing element extends a partial length along the elongate roll-formed member.
- two elongate external reinforcing elements are coupled to one or both of the first and second flanges.
- At least one elongate external reinforcing element is coupled to both the first and second flanges.
- two elongate external reinforcing elements are coupled to each of the first and second flanges.
- first and second webs have indentations in a mid-region extending longitudinally along the elongate roll-formed structural member to improve structural performance of the member.
- the body cross-section including the recessed region extends along at least a significant portion of the length of the elongate roll-formed member.
- the invention broadly comprises a method of forming an elongate roll-formed structural member comprising: providing metal sheets, bending the metal sheets with rollers to form a pair of generally C-shaped channel elements, nesting the pair of generally C-shaped channel elements together to form a body having a substantially rectangular cross-section profile, the body comprising: first and second flanges substantially parallel and spaced apart at top and bottom of the body respectively, and first and second web portions separating the first and second flanges, the first and second web portions being substantially parallel and spaced apart at respective sides, and bending the metal sheets to form a recessed region where the first and second web portions at one or both of the top and/or bottom of the body narrow towards each other.
- the method further comprises fitting one or more elongate external reinforcing elements with a predetermined length onto one or both of the flanges.
- the method further comprises providing fasteners to couple each elongate external reinforcing element onto the flanges.
- the predetermined length of the elongate external reinforcing elements is the same as the length of the body of the elongate roll-formed structural member to reinforce the whole member.
- the predetermined length of the elongate external reinforcing elements is less than the length of the body of the elongate roll-formed structural member to reinforce part of the member.
- the method further comprises forming indentations extending longitudinally in a mid-region along the elongate roll-formed structural member to improve structural performance of the member.
- the body cross-section including the recessed region extends along at least a significant portion of the length of the elongate roll-formed member.
- Figure 1 shows an end view of an elongate roll-formed structural member.
- Figure 2 shows a perspective view of the elongate roll-formed structural member.
- Figure 3 shows an exploded end view of the elongate roll-formed structural member.
- Figure 4 shows an exploded perspective view of the elongate roll-formed structural member.
- Figure 5 shows an end view of the elongate roll-formed structural member within a rectangular envelope.
- Figure 6 shows a perspective view of two elongate roll-formed structural members coupled together with a connection plate.
- Figure 7 shows a close-up perspective view of an elongate roll-formed structural member.
- Figure 8 shows an exploded view of two roll formed C-shaped channel elements.
- the roll-formed structural member 1 has a body 10 having a substantially rectangular cross-section profile.
- the body 10 has a profile cross-section resembling a rectangular shape (including a square), despite also having some features such as indentations 18 which do not substantially change the main profile.
- the resulting elongate roll-formed structural member 1 is hollow and lightweight.
- a lightweight structural member is simple to work with, may have lighter foundation requirements due to less building weight, and can be transported easily.
- the roll-formed structural member 1 can be used as a building component such as in framing, walls, roofing members, or flooring for example.
- Such beam members provide excellent strength for their weight, making them particularly suitable for certain types of structures being clear span structures, portals, mezzanine floors, alternatives to where laminated wood beams or structural steel are used, for example.
- the roll-formed structural member 1 is formed from metal such as hot-dipped galvanised cold rolled steel. This is beneficial as the structural member 1 will perform well in many environments and is less likely deteriorate due to rot, burn due to fire or erode in comparison to other material such as timber.
- the body 10 of the elongate roll-formed structural member is formed from a pair of generally C-shaped channel elements 11, 12 nested together (facing towards each other).
- the nested C-shaped channel elements 11,12 hold each other together, and no welding is necessary.
- the C-shaped channel elements 11, 12 are coupled together by techniques known to a person skilled in the art such as crimping or clinching.
- the C-shaped channel elements 11 are welded or spot welded.
- the pair of C-shaped channel elements 11, 12 are similar or the same shaped.
- the elongate roll-formed structural member 1 is formed from a metal sheet with a predetermined length.
- the resulting roll-formed structural member 1 is an elongate structure with a member length 2 as referenced in figure 2.
- the manufactured member length 2 can be tailored to the building application.
- the body 10 of the elongate roll-formed structural member 1 preferably has first and second flanges 21, 22 substantially parallel and spaced apart at a top and bottom 13, 14 of the body 10 respectively.
- the body 10 of the elongate roll-formed structural member 1 preferably has first and second web portions 23, 24 separating the first and second flanges 21, 22.
- the first and second web portions 23, 24 are substantially parallel and spaced apart at sides respectively.
- the body 10 having a generally rectangular cross-sectional profile is formed by a pair of C-shaped channel elements 11, 12.
- Each of the of C-shaped channel elements 11, 12 comprises a web portion, and two depending flange portions.
- the resulting body 10 comprises flanges 21, 22 of double thickness which improves the strength of the beam.
- the body cross-section including the recessed region 30 extends along at least a significant portion of the length 2 of the elongate roll- formed member 1.
- a significant portion can be defined as a member 1 which has the described cross-section (including a recessed region 30) along at least a portion of the length 2, such that it has a material effect on the member 1.
- the cross-section including the recessed region 30 is long enough such that when it receives one or more external reinforcing members 40, 40' (introduced later), it will have a material effect (e.g. strengthening the member 1).
- the body cross-section extends over half the length 2 of the member 1.
- that the body cross-section extends less than half of the length 2 of the member 1 (but still a significant portion, such that it has a material effect on the member).
- the body cross-section extends over the full length It is anticipated, that very localised changes to the cross-section of the member 1 (e.g. ribs, small dents etc.) will not be considered a cross-section along a significant portion of the length 2 of the member 1.
- the elongate roll-formed structural member 1 can have web portions 23, 24 of shorter lengths compared to traditional beams. This can allow for more usable internal floor area in some building situations.
- the web portions 23, 24 at a top and/or bottom of the of the body 10 narrow towards each other and defines a recessed region 30.
- the recessed region 30 is formed at one of the top or bottom 13, 14 of the body 10. In other configurations, the recessed region 30 is formed at both the top and bottom 13, 14 of the body 10.
- the recessed region 30 is at the uppermost or lowermost ends 13, 14 of the body.
- each recessed region 30 is not located at a mid-region 15 of the body 10. Instead in the preferred configurations, each recessed region 30 is located at a segment of the web portions 23, 24 immediately adjacent the flange.
- the recessed region 30 is narrowed such that the width 3 between the first and second web portions 23, 24 at the recessed region 30 is less than the width
- the flange 21, 22 adjacent the recessed region 30 has a flange width
- the flange 21, 22 adjacent the recessed region 30 has a flange width 5 at least less than the width 4 of the widest space between the first and second web portions as referenced in figure 3.
- the recessed region 30 is configured to receive an external component onto the body 10 of elongate roll-formed structural member 1.
- the recessed region 30 is configured to receive an external elongate reinforcing element 40.
- the resulting structure is a boxsection in which the reinforcing element(s) lie within a general rectangular profile or envelope 50 as shown in figure 5.
- the external elongate reinforcing element 40 and fasteners 9 are located inside the rectangular envelope 50 so that external components of a structure (such as external plates, purlins and girts etc.) can be mounted close to the member 1 without interference from the external reinforcing element and fasteners.
- the recessed region 30 reduces flexural moment (bending) by about 9% in comparison to an elongate roll-formed structural member without the recessed region.
- Flexural moment in the preferred configurations reduces as the body crosssection including the recessed region 30 extends along at least a significant portion of the length 2 of the elongate roll-formed member 1.
- one or more external elongate reinforcing elements 40, 40' are configured to be coupled onto the recessed region(s) 30 of the elongate roll-formed structural member 1.
- the elongate roll-formed structural member 1 does not include an external elongate reinforcing element 40. This type of configuration can be seen in figure 3, if the reinforcing elements 40, 40' are taken away.
- the improvement of the roll-formed structural member 1 lies with the recessed region 30 which provides an option to receive an external component without unduly compromising the strength of the structural member.
- external elongate reinforcing elements 40, 40' are present, and are coupled onto the recessed region(s) 30 of the elongate roll-formed structural member 1.
- the reinforcing elements 40, 40' are advantageous as they can help strengthen the roll-formed structural member 1, by offering better resistance against structural failure such as by buckling, separating, or at least become structures which creak which is undesirable.
- the strength of the roll-formed structural member 1 can increase by approximately 250%.
- each elongate external reinforcing element 40, 40' comprises a C- shaped cross-section having a flange-corresponding portion 41 and two webcorresponding portions 42 depending from the flange-corresponding portion (referenced in figure 3).
- the flange-corresponding portion 41 is located directly or indirectly over the first or second flanges 21, 22 of the body 10.
- the two web-corresponding portions 42 is located directly or indirectly over the first and second web portions 23, 24 of the body 10.
- the elongate external reinforcing element 40, 40' comprises a cross- sectional profile to fit over a corresponding recessed region 30 of the body 10, as best shown in figures 1 and 3.
- the recessed region 30 comprises a recess width 31 between one and five times a wall thickness 43 of the elongate external reinforcing element 40.
- the recessed region 30 comprises a recess width 31 between one and three times the wall thickness 43 of the elongate external reinforcing element 40.
- improved strength characteristics of the roll- formed structural member 1 is due to an increase in wall thickness 6 at important regions of the structural member.
- the increased wall thickness 6 may be due to overlapping ends 16, 16' of the C-shaped channel elements 11, 12 which form the flanges 21, 22.
- the external reinforcing element(s) 40, 40' form the increased wall thickness 6 in addition to the overlapping ends 16, 16' of the C-shaped channel elements 11, 12 as referenced in figure 1.
- the elongate external reinforcing element(s) 40, 40' coupled to the recessed region 30 form a wall thickness 6 between two and six times a wall thickness of the web portions 7 without reinforcement.
- the elongate external reinforcing element(s) 40, 40' coupled to the recessed region 30 form a wall thickness 6 between 2 and 5 times a wall thickness of the web portions 7 without reinforcement.
- the wall thickness of the web portions 7 is two to five mm thick.
- the external elongate reinforcing elements 40, 40' and the recessed region 30 features work in synergy to provide an elongate roll-formed structural member 1 with improved structural properties while providing a substantially planar outer profile particularly with attached reinforcement element(s).
- the two web-corresponding portions 42 of an outermost external elongate reinforcing element 40' do not protrude outward past the widest region 25 of the web portions 23, 24.
- the two web-corresponding portions 42 of the outermost external elongate reinforcing element 40' is on the same plane or recessed inward from the widest region 25 of the web portions as shown on figure 1.
- An elongate roll-formed structural member 1 with a substantially planar outer profile where the reinforcing elements 40, 40' do not protrude outwardly from the main body 10 is beneficial.
- a structural member 1 with a substantially planar outer profile will sit against other building components such as other framing, other structural members, or connection elements etc. better.
- the roll- formed structural member 1 abuts against a connection plate 8 evenly. The points of contact between the structural member 1 and the connection plate 8 do not decrease with the presence of the reinforcement elements 40, 40'. The resulting interaction between the components is stable.
- the recessed region 30 acts as a locator on the structural member
- the elongate roll-formed structural member 1 further comprises fasteners 9 to couple the external elongate reinforcing element 40 onto the body 10.
- the fasteners 9 are one or a combination of screws, rivets, bolts, adhesives, welds, spot welds etc.
- the elongate external reinforcing element 40 extends along a full length 2 of the elongate roll-formed structural member 1 as shown in figure
- a structural member 1 with reinforcement along its full length 2 may be advantageous as the full member is reinforced to improve the structural properties of the member.
- the elongate external reinforcing element 40 extends a partial length along the elongate roll-formed member 1' as shown in figure 6.
- the elongate external reinforcing element 40 provides localised reinforcement, and a region 17 of the member will remain unreinforced.
- the elongate external reinforcing element 40 extends along at least a significant portion of the length 2 of the elongate roll-formed member 1, such that it will have a material effect on the member.
- a partially reinforced member 1' is advantageous as it is cost-effective and less resources are required to reinforce the member. Furthermore, the resulting reinforced member 1' is more lightweight which has further benefits such as the potential for lighter foundations due to the lighter structure.
- the recessed region 30 does not affect the structural performance of the member 1. Meanwhile, the recessed region 30 provides a space to receive external reinforcing elements 40 when and where it is required.
- the reinforcement element 40 may for example depend on the load the member 1 is supporting and/or the length 2 of the member. Preferably, the reinforcement element 40 will be located where the reinforcement is necessary, such as a region where failure is likely to occur along the member.
- the greatest loadings are towards the ends of a beam, therefore it may be necessary to only improve strength these points by adding the reinforcement element 40.
- the length of reinforcement element 40 needed may be determined by load factors. For example, a very long span with heavy loading may require full reinforcement (i.e. the length of the reinforcement element is the same as the length of the full structural member itself). Preferably, the length of reinforcement element 40 is significant such that it has a material effect on the member 1.
- FIG 6 two elongate roll-formed structural members 1, 1' connected by a connection plate 8 is shown.
- the external elongate reinforcing element 40 extends along the entire length of structural member 1, while only extending a partial length along structural member 1'.
- the reinforcing element 40 is located towards one end of structural member 1'.
- the elongate reinforcing elements 40 are external components, configured to be coupled onto an outer surface of the body 10 of the roll-formed structural member 1.
- An external reinforcing element 40 is beneficial as it acts as a visual indicator. The presence and location of the external reinforcement element 40 can be seen which is useful.
- An external reinforcing element 40 will help workers determine which orientation the structural member 10 is in and help determine if the member has been reinforced. As workers can visually see the external reinforcing element 40 on the outer surface of the structural member, this can be beneficial in some situations, such as allowing for building inspection from the ground.
- At least one elongate external reinforcing element 40 is coupled to both the first and second flanges 21, 22.
- two elongate external reinforcing elements 40. 40' are coupled to each of the first and second flanges 21, 22.
- only one of the first or second flanges 21,22 have reinforcing elements 40.
- only one elongate external reinforcing element 40 is coupled to one or both of the flanges 21, 22.
- two elongate external reinforcing elements 40, 41' are coupled to one or both of the first and second flanges 21, 22.
- two elongate external reinforcing elements 40, 41' are coupled to: a) The first flange 21, b) The second flange 22, or c) Both the first and second flanges 21, 22 as shown in figure 2.
- first and second webs 23, 24 have indentations 18 in a midregion 15 extending longitudinally along the elongate roll-formed structural member to improve the structural performance of the member (referenced in figures 2 and 3).
- firstly metal sheets are provided.
- the metal sheets are progressively formed with rollers to form a pair of generally C-shaped channel elements.
- the process of roll-forming to form elongate components is known to a person skilled to the art and will not be described further in detail.
- the pair of generally C-shaped channel elements 11, 12 are then nested together (as shown in figure 8) to form a body 10 having a substantially rectangular cross-section profile.
- the body 10 is formed with flanges 21, 22 and web portions 23, 24 as described above.
- the metal sheets are bent to form the recessed region 30 where the first and second web portions 23, 24 at one or both of the top and/or bottom of the body 10 narrow towards each other.
- one or more elongate external reinforcing elements 40, 40' with a predetermined length is fitted onto one or both of the flanges 21, 22.
- the predetermined length of the elongate external reinforcing elements 40, 40' is the same as the length 2 of the body 10 of the elongate roll-formed structural member 1, so that the whole member is reinforced. In other configurations, the predetermined length of the elongate external reinforcing elements 40, 40' is less than the length of the body 10 of the elongate roll- formed structural member to reinforce only a part of the member 1.
- fasteners 9 as described above are used to couple each elongate external reinforcing element 40, 41 onto the flanges 21, 22.
- This invention may also be said broadly to consist in the parts, elements and features referred to or indicated in the specification of the application, individually or collectively, and any or all combinations of any two or more of said parts, elements or features, and where specific integers are mentioned herein which have known equivalents in the art to which this invention relates, such known equivalents are deemed to be incorporated herein as if individually set forth.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18/263,391 US20240093489A1 (en) | 2021-02-03 | 2021-02-03 | Improved roll-formed structural member |
CN202180092762.7A CN116897239A (en) | 2021-02-03 | 2021-02-03 | Improved roll formed structural member |
EP21924509.9A EP4288619A1 (en) | 2021-02-03 | 2021-02-03 | Improved roll-formed structural member |
PCT/IB2021/050846 WO2022167834A1 (en) | 2021-02-03 | 2021-02-03 | Improved roll-formed structural member |
AU2021425254A AU2021425254A1 (en) | 2021-02-03 | 2021-02-03 | Improved roll-formed structural member |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IB2021/050846 WO2022167834A1 (en) | 2021-02-03 | 2021-02-03 | Improved roll-formed structural member |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022167834A1 true WO2022167834A1 (en) | 2022-08-11 |
Family
ID=82742024
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2021/050846 WO2022167834A1 (en) | 2021-02-03 | 2021-02-03 | Improved roll-formed structural member |
Country Status (5)
Country | Link |
---|---|
US (1) | US20240093489A1 (en) |
EP (1) | EP4288619A1 (en) |
CN (1) | CN116897239A (en) |
AU (1) | AU2021425254A1 (en) |
WO (1) | WO2022167834A1 (en) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU5281073A (en) * | 1972-03-27 | 1974-09-05 | Unitedstates Gypsum Company | Nesting structural member |
SE454524B (en) * | 1984-10-30 | 1988-05-09 | Plannja Ab | Box beam made from two thin plate bodies |
GB2288417A (en) * | 1994-04-13 | 1995-10-18 | Midland Ind Holdings Ltd | Elongate structural elements |
GB2312005A (en) * | 1996-04-11 | 1997-10-15 | Metsec Plc | Fence post construction |
WO1999067478A1 (en) * | 1998-06-23 | 1999-12-29 | Rbs Technologies Holding Company Pty. Limited | Elongate structural member |
FR2821101A1 (en) * | 2001-02-16 | 2002-08-23 | Saint Gobain Isover | Wall facing panel spacer and fastening comprises asymmetrical U-section member that engages with another one of the same shape and reversed |
FR2827943A1 (en) * | 2001-07-25 | 2003-01-31 | Richter System Gmbh & Co Kg | C-shaped section for buildings comprises web surface and two bar surfaces welded at right angles with free edges welded in two edges directed towards each other |
-
2021
- 2021-02-03 US US18/263,391 patent/US20240093489A1/en active Pending
- 2021-02-03 AU AU2021425254A patent/AU2021425254A1/en active Pending
- 2021-02-03 CN CN202180092762.7A patent/CN116897239A/en active Pending
- 2021-02-03 WO PCT/IB2021/050846 patent/WO2022167834A1/en active Application Filing
- 2021-02-03 EP EP21924509.9A patent/EP4288619A1/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU5281073A (en) * | 1972-03-27 | 1974-09-05 | Unitedstates Gypsum Company | Nesting structural member |
SE454524B (en) * | 1984-10-30 | 1988-05-09 | Plannja Ab | Box beam made from two thin plate bodies |
GB2288417A (en) * | 1994-04-13 | 1995-10-18 | Midland Ind Holdings Ltd | Elongate structural elements |
GB2312005A (en) * | 1996-04-11 | 1997-10-15 | Metsec Plc | Fence post construction |
WO1999067478A1 (en) * | 1998-06-23 | 1999-12-29 | Rbs Technologies Holding Company Pty. Limited | Elongate structural member |
FR2821101A1 (en) * | 2001-02-16 | 2002-08-23 | Saint Gobain Isover | Wall facing panel spacer and fastening comprises asymmetrical U-section member that engages with another one of the same shape and reversed |
FR2827943A1 (en) * | 2001-07-25 | 2003-01-31 | Richter System Gmbh & Co Kg | C-shaped section for buildings comprises web surface and two bar surfaces welded at right angles with free edges welded in two edges directed towards each other |
Also Published As
Publication number | Publication date |
---|---|
EP4288619A1 (en) | 2023-12-13 |
CN116897239A (en) | 2023-10-17 |
US20240093489A1 (en) | 2024-03-21 |
AU2021425254A1 (en) | 2023-08-17 |
AU2021425254A9 (en) | 2024-05-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5553437A (en) | Structural beam | |
US8181423B2 (en) | Beam | |
US7587877B2 (en) | Cold-formed steel joists | |
CA2702746C (en) | Non load-bearing metal wall stud having increased strength | |
AU657689B2 (en) | Structural beam | |
CA2667892C (en) | Lower chord bearing cold-formed steel joists | |
US20090113827A1 (en) | Metal construction member | |
US20060053732A1 (en) | Cold-formed steel joists | |
WO2017165601A1 (en) | In-frame shear wall | |
US5956919A (en) | Spanning member with convoluted web and C-shaped flanges | |
US20240093489A1 (en) | Improved roll-formed structural member | |
NZ756430A (en) | Improved roll-formed structural member | |
NZ756430B2 (en) | Improved roll-formed structural member | |
AU2012200960B2 (en) | Lower chord bearing cold-formed steel joists | |
CA2542848C (en) | Upper chord bearing cold-formed steel joists | |
KR20010077017A (en) | Structurally Enhanced Metal Sheet Structural Member and Frame Systems using such Member | |
AU2004249793B2 (en) | An improved beam | |
AU2008201614A1 (en) | Lower chord bearing cold-formed steel joists | |
GB2304744A (en) | Flanged structural members |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21924509 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 18263391 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202180092762.7 Country of ref document: CN |
|
ENP | Entry into the national phase |
Ref document number: 2021425254 Country of ref document: AU Date of ref document: 20210203 Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2021924509 Country of ref document: EP Effective date: 20230904 |