WO1991009252A1 - Structural member - Google Patents
Structural member Download PDFInfo
- Publication number
- WO1991009252A1 WO1991009252A1 PCT/AU1990/000577 AU9000577W WO9109252A1 WO 1991009252 A1 WO1991009252 A1 WO 1991009252A1 AU 9000577 W AU9000577 W AU 9000577W WO 9109252 A1 WO9109252 A1 WO 9109252A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- web
- structural member
- pair
- flanges
- components
- Prior art date
Links
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
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16S—CONSTRUCTIONAL ELEMENTS IN GENERAL; STRUCTURES BUILT-UP FROM SUCH ELEMENTS, IN GENERAL
- F16S3/00—Elongated members, e.g. profiled members; Assemblies thereof; Gratings or grilles
- F16S3/06—Assemblies of elongated members
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/38—Arched girders or portal frames
- E04C3/40—Arched girders or portal frames 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
- 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
Definitions
- This invention relates to a composite structural member which can be used for example as a post, beam, rafter, floor joist, or for other purposes in building or agricultural construction, fencing and other general purposes.
- An object of the invention i ⁇ therefore to provide a cross-sectional shape of a two-component beam wherein contiguity is retained between inner and outer laminae having the extreme fibres, without the use of fasteners. It i ⁇ a further object to provide a shape wherein the components can be readily roll-formed, and after roll-forming, can be readily sprung together to form the hollow section composite beam, but retain its shape and full strength * p to failure.
- a composite structural member is fabricated by springing together two generally 'C section components, each of which has a web with a pair of ribs extending along it, upper and lower flanges terminating at their edges in sub-flanges directed towards each other, and at least one sub-flange terminates in a lip which is directed back towards the web.
- a lip of each component engages an inner surface of a rib of the other component, thereby inhibiting displacement of contiguous flanges, and maintaining a high moment of inertia which inhibits excessive deflection of the member under load.
- the invention consists of a pair of generally r C-section components of identical constant cross- sectional shape, each having two spaced parallel main flanges, a web flanking the main flanges and joining a first pair of corresponding edges thereof, sub-flanges parallel to the web extending generally towards each other from a second pair of corresponding edges of the main flanges, and a return stiffening lip directed towards the web from at least one of the sub-flanges, said web having a pair of inwardly formed ribs defined by inwardly directed wall portions, said at least one lip of each one of the 'C-section components engaging an inner surface of a said inwardly directed wall portion of a said web rib of the other ' C-section component.
- the structural member when under load and placed with the webs parallel to the plane of the load direction, can provide effective upper and lower extreme fibres of the section of double metal thickness, the intermediate portions being a single metal thickness of the webs.
- a first drawing represents the closest art known to the Applicants
- Fig. 1 is a fragmentary perspective view of a composite structural member according to the invention
- Fig. 2 illustrates the springing together of two roll- formed components of identical cross-section to fabricate a structural member
- Fig. 3 illustrates diagrammatically a typical usage of the members, in the construction of a building
- Fig. 4 illustrates a test arrangement in which the deflection was tested against load applied, the results being shown below.
- the first drawing illustrates the closest prior art known to the Applicants, that is the aforesaid Hunter Douglas R.F. Beam.
- the hollow structural member 10 comprises two identical member 'C-section components 11 each of which is formed from sheet metal and comprise ⁇ a web 12 flanking two main flanges 13 each of which ter inate ⁇ along corresponding edges in an inturned sub-flange 14, and each of the sub-flange ⁇ 14 is provided with stiffening lips 15a and 15b extending along its inner edge. (In some instances the lip 15a is omitted. )
- Each web 12 is provided with a pair of spaced ribs 16 defined by inwardly directed sloping wall portions 17, and upon assembly, lips 15a and 15b of each of the 'C-section components 11 engage respective outer and inner surfaces of the inwardly directed wall portions 17. It is this engagement which assists inhibition of displacement of the contiguous main flanges 13 of the two member components 11, even when no fasteners are used to retain them.
- the main flanges 14 are also provided with ribs 18 which are de ⁇ irable in the roll-forming, and also stiffen the main flanges.
- the outside dimension 'd' across the width of one main flange 13 which carries the inner of the lips 15 is two metal thicknesses less than the corresponding width 'D' of the flange which carries the outer of the stiffening lips 15.
- the illustrations show the sections 11 each having been formed of identical cross-sectional shape by a roll-forming process.
- the invention is not necessarily limited to the roll-forming process and in some embodiments it is desirable to produce the sections by an extrusion process, for example of structural aluminium.
- the assembly which is shown provides a structural member 10 which has very substantial strength because if load is applied vertically to the assembly of Fig. 2, upper and lower chords of the structural member have double metal thickness and the strength of the compo ⁇ ite member i ⁇ con ⁇ iderable even without the use of fasteners which may however be added to compensate for the shear forces which exist when the member is subjected to loading.
- fasteners which may however be added to compensate for the shear forces which exist when the member is subjected to loading.
- a roof support bracket 25 comprises side plates 26 spaced apart by two L-shaped spacers 27 to form, in effect, three sockets 28 (for the post 21), 29 (for the tie beam 23), and 30 (for rafter 22).
- a ridge support as ⁇ embly 32 comprises plates forming two sockets 33 for raf ers, joined together by fasteners through contiguous clamp plates 34.
- Side plates 36 intermediate the end ⁇ of tie beam 23 provide clamping means for the lower end of strut 24.
- Fig 4 illustrates a deflection testing arrangement wherein a structural member was compared with the illustrated prior art.
- the representations are accurately drawn, and the overall dimensions of the two sections were identical, the metal thickness identical, but the Applicants' rolled section was necessarily of a softer grade of aluminium (H34 standard half- hard, compared with HI6 structural grade).
- the relative strengths are as follows:
- the deflection/load ratio was within an anticipated range
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
- Temperature-Responsive Valves (AREA)
- Glass Compositions (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU69549/91A AU652139B2 (en) | 1989-12-08 | 1990-12-04 | Structural member |
KR1019910700889A KR920701751A (en) | 1989-12-08 | 1990-12-04 | Structural members |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPJ7847 | 1989-12-08 | ||
AUPJ784789 | 1989-12-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1991009252A1 true WO1991009252A1 (en) | 1991-06-27 |
Family
ID=3774414
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU1990/000577 WO1991009252A1 (en) | 1989-12-08 | 1990-12-04 | Structural member |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0457877A4 (en) |
KR (1) | KR920701751A (en) |
CN (1) | CN1054640A (en) |
AU (1) | AU652139B2 (en) |
CA (1) | CA2047224A1 (en) |
WO (1) | WO1991009252A1 (en) |
ZA (1) | ZA909681B (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2714861A1 (en) * | 1994-01-12 | 1995-07-13 | Saint Maxent Michel | Fishplating of metal frame sections |
GB2288417A (en) * | 1994-04-13 | 1995-10-18 | Midland Ind Holdings Ltd | Elongate structural elements |
WO2000015921A1 (en) * | 1998-09-14 | 2000-03-23 | Spantec Systems Pty. Ltd. | Improvements relating to trusses |
GB2414025A (en) * | 2004-05-14 | 2005-11-16 | Blue Cube | Composite flexible beam. |
DE4446227B4 (en) * | 1994-01-28 | 2006-01-12 | Vogl, Erich R. | Connecting element for longitudinal joining of C-profiles |
NL1029063C2 (en) * | 2005-05-17 | 2006-11-20 | Beno Techniek B V | Stand for supporting wall sections, comprises outer framework containing inner framework for increasing resistance to torsion and bending forces |
WO2007016735A1 (en) * | 2005-08-08 | 2007-02-15 | Dematic Pty Ltd | A storage rack beam |
RU2478764C1 (en) * | 2011-11-07 | 2013-04-10 | Федеральное Государственное Автономное Образовательное Учреждение Высшего Профессионального Образования "Сибирский Федеральный Университет" | Bent steel shape and composite building element on its basis |
AU2019201985B2 (en) * | 2009-12-22 | 2020-07-23 | Bluescope Steel Limited | Improved box beam and C-section structural member therefor |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1992021913A1 (en) * | 1991-05-28 | 1992-12-10 | John Vincent Moore (Consulting Engineers) Pty. Ltd | Steel beam and method of fabrication |
AU649335B2 (en) * | 1991-06-28 | 1994-05-19 | Stratco Metal Proprietary Limited | Improved tubular section |
WO1993015353A1 (en) * | 1992-01-24 | 1993-08-05 | Rmt Pty. Ltd. | Element for composite structural member |
AU767942B2 (en) * | 1992-06-29 | 2003-11-27 | Stratco Metal Proprietary Limited | Further improved tubular section |
CN108978870A (en) * | 2018-06-29 | 2018-12-11 | 浙江展诚建设集团股份有限公司 | Fold-line-shaped girder steel and concrete combined structure construction method |
RU197859U1 (en) * | 2019-12-13 | 2020-06-03 | Общество с ограниченной ответственностью «Забор Профиль» | Strap |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB849321A (en) * | 1958-04-01 | 1960-09-21 | Alberto Pagan | Improvements relating to girders |
FR2114490A5 (en) * | 1970-11-11 | 1972-06-30 | Kramme Et Zeuthen As | |
AU477444B2 (en) * | 1972-08-16 | 1974-10-03 | G. J. HOLDINGS PTY. LTD. and ROEBUCK DEVELOPMENTS PTY. LTD | Improved truss |
FR2568668A3 (en) * | 1984-08-03 | 1986-02-07 | Profilafroid Sa | Cabinet longitudinal member |
EP0332882A1 (en) * | 1988-03-18 | 1989-09-20 | Hoesch Stahl Aktiengesellschaft | Sheet steel girder |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL6902562A (en) * | 1969-02-18 | 1970-08-20 | ||
AU5281073A (en) * | 1972-03-27 | 1974-09-05 | Unitedstates Gypsum Company | Nesting structural member |
AU514640B2 (en) * | 1976-12-07 | 1981-02-19 | Roll Form Industries Pty. Ltd. | Interconnection of members |
AU513719B2 (en) * | 1977-05-25 | 1980-12-18 | Fletcher Industries Ltd. | Building construction |
DE8911488U1 (en) * | 1989-09-27 | 1989-11-16 | Chen, Aden, Changhua City | Frame construction for a transportable building |
-
1990
- 1990-12-03 ZA ZA909681A patent/ZA909681B/en unknown
- 1990-12-04 CA CA002047224A patent/CA2047224A1/en not_active Abandoned
- 1990-12-04 KR KR1019910700889A patent/KR920701751A/en not_active Application Discontinuation
- 1990-12-04 AU AU69549/91A patent/AU652139B2/en not_active Ceased
- 1990-12-04 WO PCT/AU1990/000577 patent/WO1991009252A1/en not_active Application Discontinuation
- 1990-12-04 EP EP19910900674 patent/EP0457877A4/en not_active Withdrawn
- 1990-12-08 CN CN90110414A patent/CN1054640A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB849321A (en) * | 1958-04-01 | 1960-09-21 | Alberto Pagan | Improvements relating to girders |
FR2114490A5 (en) * | 1970-11-11 | 1972-06-30 | Kramme Et Zeuthen As | |
AU477444B2 (en) * | 1972-08-16 | 1974-10-03 | G. J. HOLDINGS PTY. LTD. and ROEBUCK DEVELOPMENTS PTY. LTD | Improved truss |
FR2568668A3 (en) * | 1984-08-03 | 1986-02-07 | Profilafroid Sa | Cabinet longitudinal member |
EP0332882A1 (en) * | 1988-03-18 | 1989-09-20 | Hoesch Stahl Aktiengesellschaft | Sheet steel girder |
Non-Patent Citations (1)
Title |
---|
See also references of EP0457877A4 * |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2714861A1 (en) * | 1994-01-12 | 1995-07-13 | Saint Maxent Michel | Fishplating of metal frame sections |
DE4446227B4 (en) * | 1994-01-28 | 2006-01-12 | Vogl, Erich R. | Connecting element for longitudinal joining of C-profiles |
GB2288417A (en) * | 1994-04-13 | 1995-10-18 | Midland Ind Holdings Ltd | Elongate structural elements |
GB2288417B (en) * | 1994-04-13 | 1998-05-27 | Midland Ind Holdings Ltd | Structural element and structure incorporating such element |
WO2000015921A1 (en) * | 1998-09-14 | 2000-03-23 | Spantec Systems Pty. Ltd. | Improvements relating to trusses |
GB2414025A (en) * | 2004-05-14 | 2005-11-16 | Blue Cube | Composite flexible beam. |
GB2414025B (en) * | 2004-05-14 | 2006-07-05 | Blue Cube | A seating support beam |
NL1029063C2 (en) * | 2005-05-17 | 2006-11-20 | Beno Techniek B V | Stand for supporting wall sections, comprises outer framework containing inner framework for increasing resistance to torsion and bending forces |
WO2007016735A1 (en) * | 2005-08-08 | 2007-02-15 | Dematic Pty Ltd | A storage rack beam |
AU2019201985B2 (en) * | 2009-12-22 | 2020-07-23 | Bluescope Steel Limited | Improved box beam and C-section structural member therefor |
RU2478764C1 (en) * | 2011-11-07 | 2013-04-10 | Федеральное Государственное Автономное Образовательное Учреждение Высшего Профессионального Образования "Сибирский Федеральный Университет" | Bent steel shape and composite building element on its basis |
Also Published As
Publication number | Publication date |
---|---|
ZA909681B (en) | 1991-09-25 |
KR920701751A (en) | 1992-08-12 |
AU652139B2 (en) | 1994-08-18 |
EP0457877A1 (en) | 1991-11-27 |
CN1054640A (en) | 1991-09-18 |
CA2047224A1 (en) | 1991-06-09 |
EP0457877A4 (en) | 1992-05-13 |
AU6954991A (en) | 1991-07-18 |
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