EP0457877A1 - Structural member - Google Patents
Structural memberInfo
- Publication number
- EP0457877A1 EP0457877A1 EP91900674A EP91900674A EP0457877A1 EP 0457877 A1 EP0457877 A1 EP 0457877A1 EP 91900674 A EP91900674 A EP 91900674A EP 91900674 A EP91900674 A EP 91900674A EP 0457877 A1 EP0457877 A1 EP 0457877A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pair
- web
- structural member
- flanges
- components
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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)
- Glass Compositions (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
- Temperature-Responsive Valves (AREA)
Abstract
On fabrique un élément structurel composite (10) en serrant ensemble deux composants possédant généralement une section en forme de 'C' (11), chacune d'elles possédant une âme (12) comportant une paire de nervures (16) tout au long de celle-ci, des rebords principaux supérieur et inférieur (13) se terminant à leur extrémité en rebords secondaires (14) dirigés les uns vers les autres, chaque rebord secondaire se terminant par une lèvre (15a, 15b) dirigée vers l'âme (12). Les lèvres (15a, 15b) de chaque composant enserrant respectivement les surfaces externes et internes des nervures (16) de l'autre composant empêchant ainsi le déplacement des rebords contigus (13) et maintenant un fort moment d'inertie empêchant une déflexion excessive de l'élément sous application d'une charge.A composite structural element (10) is manufactured by clamping together two components generally having a C-shaped section (11), each of them having a core (12) comprising a pair of ribs (16) throughout the latter, upper and lower main flanges (13) ending at their end in secondary flanges (14) directed towards each other, each secondary flange ending in a lip (15a, 15b) directed towards the core ( 12). The lips (15a, 15b) of each component respectively enclosing the external and internal surfaces of the ribs (16) of the other component thus preventing the displacement of the contiguous edges (13) and maintaining a strong moment of inertia preventing excessive deflection of the element under load.
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU7847/89 | 1989-12-08 | ||
AUPJ784789 | 1989-12-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0457877A1 true EP0457877A1 (en) | 1991-11-27 |
EP0457877A4 EP0457877A4 (en) | 1992-05-13 |
Family
ID=3774414
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19910900674 Withdrawn EP0457877A4 (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) |
Families Citing this family (15)
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 |
FR2714861B1 (en) * | 1994-01-12 | 1996-03-29 | Saint Maxent Michel | Splicing device for profile. |
DE9401416U1 (en) * | 1994-01-28 | 1994-03-10 | Vogl, Erich R., 91448 Emskirchen | Connection element for longitudinal connection of C-profiles |
GB9407295D0 (en) * | 1994-04-13 | 1994-06-08 | Midland Ind Holdings Plc | Structural element and structure incorporating such element |
AUPP590998A0 (en) * | 1998-09-14 | 1998-10-08 | Spantec Systems Pty Ltd | Improvements relating to trusses |
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 |
NZ565873A (en) * | 2005-08-08 | 2011-02-25 | Dematic Pty Ltd | A storage racking beam with a horizontal loading capacity independent of its vertical loading capacity |
AU2010249239A1 (en) * | 2009-12-22 | 2011-07-07 | 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 |
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 (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL6902562A (en) * | 1969-02-18 | 1970-08-20 | ||
FR2114490A5 (en) * | 1970-11-11 | 1972-06-30 | Kramme Et Zeuthen As | |
DE2313041A1 (en) * | 1972-03-27 | 1973-10-11 | United States Gypsum Co | WITH A SAME PROFILE COMPATIBLE TO A CLOSED BOX PROFILE |
AU513719B2 (en) * | 1977-05-25 | 1980-12-18 | Fletcher Industries Ltd. | Building construction |
AU514640B2 (en) * | 1976-12-07 | 1981-02-19 | Roll Form Industries Pty. Ltd. | Interconnection of members |
DE8911488U1 (en) * | 1989-09-27 | 1989-11-16 | Chen, Aden, Changhua City | Frame construction for a transportable building |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB849321A (en) * | 1958-04-01 | 1960-09-21 | Alberto Pagan | Improvements relating to girders |
AU477444B2 (en) * | 1972-08-16 | 1974-10-03 | G. J. HOLDINGS PTY. LTD. and ROEBUCK DEVELOPMENTS PTY. LTD | Improved truss |
FR2568668B3 (en) * | 1984-08-03 | 1986-09-05 | Profilafroid Sa | LOCKER BAR. |
DE3809046A1 (en) * | 1988-03-18 | 1989-09-28 | Hoesch Stahl Ag | STEEL PLATE CARRIER |
-
1990
- 1990-12-03 ZA ZA909681A patent/ZA909681B/en unknown
- 1990-12-04 CA CA002047224A patent/CA2047224A1/en not_active Abandoned
- 1990-12-04 EP EP19910900674 patent/EP0457877A4/en not_active Withdrawn
- 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 KR KR1019910700889A patent/KR920701751A/en not_active Application Discontinuation
- 1990-12-08 CN CN90110414A patent/CN1054640A/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL6902562A (en) * | 1969-02-18 | 1970-08-20 | ||
FR2114490A5 (en) * | 1970-11-11 | 1972-06-30 | Kramme Et Zeuthen As | |
DE2313041A1 (en) * | 1972-03-27 | 1973-10-11 | United States Gypsum Co | WITH A SAME PROFILE COMPATIBLE TO A CLOSED BOX PROFILE |
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 |
Non-Patent Citations (1)
Title |
---|
See also references of WO9109252A1 * |
Also Published As
Publication number | Publication date |
---|---|
CA2047224A1 (en) | 1991-06-09 |
CN1054640A (en) | 1991-09-18 |
KR920701751A (en) | 1992-08-12 |
WO1991009252A1 (en) | 1991-06-27 |
AU6954991A (en) | 1991-07-18 |
ZA909681B (en) | 1991-09-25 |
EP0457877A4 (en) | 1992-05-13 |
AU652139B2 (en) | 1994-08-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19910807 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES FR GB IT NL |
|
A4 | Supplementary search report drawn up and despatched |
Effective date: 19920326 |
|
AK | Designated contracting states |
Kind code of ref document: A4 Designated state(s): DE ES FR GB IT NL |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19911228 |