WO1999014451A1 - Section a bride creuse - Google Patents

Section a bride creuse Download PDF

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Publication number
WO1999014451A1
WO1999014451A1 PCT/AU1998/000756 AU9800756W WO9914451A1 WO 1999014451 A1 WO1999014451 A1 WO 1999014451A1 AU 9800756 W AU9800756 W AU 9800756W WO 9914451 A1 WO9914451 A1 WO 9914451A1
Authority
WO
WIPO (PCT)
Prior art keywords
cavity
hollow flange
base
base member
adjoining
Prior art date
Application number
PCT/AU1998/000756
Other languages
English (en)
Inventor
Leslie David Goleby
Russell Lambert Watkins
Original Assignee
Tube Technology Pty. Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tube Technology Pty. Ltd. filed Critical Tube Technology Pty. Ltd.
Priority to CA002303965A priority Critical patent/CA2303965C/fr
Priority to AU90550/98A priority patent/AU724555B2/en
Priority to NZ503353A priority patent/NZ503353A/en
Publication of WO1999014451A1 publication Critical patent/WO1999014451A1/fr
Priority to HK00107998A priority patent/HK1028629A1/xx

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
    • 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
    • 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
    • E04C2003/0408—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
    • E04C2003/0417—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 demountable
    • 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
    • E04C2003/0426—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
    • E04C2003/0439—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 cross-section comprising open parts and hollow 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
    • E04C2003/0443—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
    • E04C2003/0452—H- or I-shaped
    • E04C2003/0456—H- or I-shaped hollow flanged, i.e. "dogbone" metal beams
    • 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
    • E04C2003/0486—Truss like structures composed of separate truss elements
    • 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
    • E04C2003/0486—Truss like structures composed of separate truss elements
    • E04C2003/0491—Truss like structures composed of separate truss elements the truss elements being located in one single surface or in several parallel surfaces

Definitions

  • This invention relates to a hollow flange section and a method of making same.
  • the invention also relates to a composite structural member incorporating the hollow flange section.
  • the components include joists, purlins, rafters and beams. Most of these components can be formed in steel and include rolled hollow sections (R.S.), rolled steel joists
  • I-beams typically consist of a pair of opposed parallel flanges joined by a single flat intermediate web. In order to provide the required strength and resistance to bending, the flanges are substantially thicker than the web. Although useful, i-beams do have a number of disadvantages including :
  • Web widths to thickness ratios are generally limited to avoid reductions in section load bearing capacity due to local buckling considerations
  • the known structural members are pre-formed and delivered to a building site in set lengths. This can cause problems if long beams must be transported appreciable distances. There is advantage to providing modular beams that can be more easily transported and assembled on-site.
  • a known approach to construction of composite structural members is to knit together a number of beams welded to a pair of opposed angle brackets at the top and bottom. In order to achieve sufficient strength a complex web of struts and braces must be provided within each structural member and between structural members.
  • the flanges are folded steel plate and therefore need to be particularly heavy gauge in order to provide the required strength and resistance to skew.
  • In order to capture the web a lower portion of the CHS web is crushed so as to form a neck which fits between the sides of the open mouth of the flange.
  • the Davis truss fails to achieve the properties necessary for an effective modular structural member.
  • the invention resides in a hollow flange section comprising : a base member; a pair of opposed cavity walls and a cavity base defining a cavity; two opposing lateral support members extending from the base member to the cavity walls such that each lateral support member forms an enclosed volume with an adjoining one of the opposed cavity walls and an adjoining portion of the base member; wherein the cavity base and the base member form an integral structure that resists skew deformation of the cavity.
  • the cavity base may be a portion of the base member or may be a separate element that is joined to the base member to form the integral structure.
  • the enclosed volume may suitably be square or rectangular.
  • the lateral support members are linear and extend from the base member at an angle to form enclosed volumes having a triangular cross- section.
  • the angle between the base member and an adjoining lateral support member is suitably in the range 20° to 45° and is most suitably 30°.
  • the cavity is suitably rectangular having parallel opposed walls and an open mouth opposite the base. The size of the cavity is selected to suit a web used to form a composite structural member.
  • the hollow flange section comprises a unitary structure, suitably manufactured of carbon steel.
  • the base member and the cavity base are preferably welded to form an integral structure.
  • the weld is preferably selected from the following : high frequency induction weld, metal inert gas weld, tungsten inert gas weld; carbon dioxide shielded arc weld; atomic hydrogen gas weld, spot weld; electron beam weld; laser weld or other suitable welding.
  • the lateral support members join the cavity walls at the top of the cavity walls.
  • the hollow flange section further comprises lugs extending beyond an intersection of the lateral support members and the cavity walls.
  • the lugs preferably terminate in a bead.
  • a plurality of apertures are formed in the lugs to facilitate fixing of a web to the hollow flange section for formation of a composite structural member.
  • the invention resides in a process of forming a hollow flange section comprising the steps of : passing a strip through a plurality of forming stations to successively deform the strip to provide a cavity and a pair of substantially hollow adjoining support volumes; further forming the deformed strip so that the base of the cavity contacts a base member connecting the adjoining support volumes; and welding the base of the cavity to the base member.
  • stations are roll forming stations.
  • the process may suitably be performed in two phases. In the first phase the strip is formed into a tube. In the second phase the tube is formed into the hollow flange section.
  • the process may further include the step of forming lugs extending beyond the adjoining support volumes.
  • a further step of forming apertures in the lugs may also be included.
  • the invention resides in a composite structural member comprising : at least two opposed hollow flange sections, said hollow flange sections comprising a base member; a pair of opposed cavity walls and a cavity base defining a cavity; two opposing lateral support members extending from the base member to the cavity walls such that each lateral support member forms an enclosed volume with an adjoining one of the opposed cavity walls and an adjoining portion of the base member; wherein the cavity base and the base member are joined to form an integral structure that resists skew deformation of the cavity; and an intermediate web; wherein the hollow flange sections are joined to opposing ends of the intermediate web such that distal ends of the web are seated in a respective cavity of the hollow flange section.
  • FIG 1 shows a perspective view of a first embodiment of a hollow flange section
  • FIG 2 shows an end view of a composite structural member formed from an R.S. web and a pair of the flanges of FIG 1 ;
  • FIG 3 shows a perspective view of the composite structural member of FIG 2;
  • FIG 4 shows a perspective view of a second embodiment of a hollow flange section;
  • FIG 5 shows an end view of a composite structural member formed from an R.S. web and a pair of the flanges of FIG 4;
  • FIG 6 shows a perspective view of the composite structural member of FIG 5
  • FIG 7 shows a flowchart of a roll forming process for forming the hollow flange section
  • FIG 8 shows an end view of a third embodiment of a hollow flange section
  • FIG 9 shows an end view of a fourth embodiment of a hollow flange section
  • FIG 10 shows an end view of a fifth embodiment of a hollow flange section
  • FIG 11 shows an end view of a sixth embodiment of a hollow flange section
  • FIG 12 shows an end view of a seventh embodiment of a hollow flange section
  • FIG 13 shows a graphical comparison of the bending capacity of prior art joists compared to joists formed using hollow flange sections according to the invention.
  • FIG 1 there is shown a hollow flange section 1 having a base member 2 and opposing lateral support members 3.
  • the lateral support members 3 are separated by a cavity 4 having opposed cavity walls 5 and cavity base 6.
  • the cavity base 6 is welded to the base member 2.
  • the lateral support members 3, cavity walls 5 and base member 2 form opposing enclosed volumes 7.
  • the cavity 4 is sized and shaped to receive web members for formation of a composite structural member as described in detail below with reference to FIG 2.
  • the lateral support members 3 provide structural strength to the flange 1 by supporting the cavity walls 5.
  • the inventors have found that between 20° and 45° is a suitable choice for the angle ⁇ between the base member 2 and the lateral support members 3. In the preferred embodiments an angle of 30° is selected as being most appropriate. Smaller angles do not have sufficient enclosed volume to provide the required strength. Larger angles require additional metal without improving performance.
  • a composite beam 8 can be formed by welding a web member 9 between opposing hollow flange sections 1 , as shown in FIG 2.
  • the flange sections 1 are welded to the web 9 at 10.
  • the resultant composite beam 8 can be used in situations previously requiring i-beams.
  • the inventors have conducted comparative tests between a conventional universal beam and composite beams of the form shown in FIG 2. The following table shows that equivalent strength is achieved at substantial reduction in mass.
  • the composite structure 11 comprises vertical beam members or posts, such as 12, and inclined beam members or braces, such as 13, assembled between a top flange 14 and a bottom flange 15.
  • the beam members 11 , 12 are welded to the flange sections 14, 15 in the manner described above.
  • a substantial advantage of the composite structure of FIG 3 is the reduced mass compared to prior art construction methods. Furthermore, transport of components to a construction site is significantly easier since the structure can be assembled on-site rather than transported complete.
  • the hollow flange section 21 comprises a base member 22 and opposing lateral support members 23.
  • the lateral support members 23 are separated by a cavity 24 having opposed cavity walls 25 and cavity base 26.
  • the cavity base 26 is welded to the base member 22.
  • the cavity walls 25 extend beyond the lateral support members 23 to provide lugs 27 terminating in beads 28.
  • the lugs 27 facilitate mechanical fixing of web 30 and flanges 21 , as shown in FIG 5. Suitable forms of mechanical fixing include TekTM screws 31 and bolts 32.
  • the hollow flange section 21 may be made with pre-punched apertures to facilitate on-site assembly of the structure 33 shown in FIG 6.
  • the lateral support members 23 provide support to the cavity walls 25 thereby giving structural strength to the flange 21.
  • the combination of the lateral support members 23 and the weld of the cavity base 26 to the base member 22 resists skew deformation of the cavity 24.
  • the composite structure 33 has a similar construction to the embodiment of FIG 3 and comprises vertical beam members or posts, such as 34, and inclined beam members or braces, such as 35, assembled between a top flange 36 and a bottom flange 37
  • the beam members 34, 35 are joined to the flange sections 36, 37 by bolts 38.
  • apertures may be pre-formed in the flanges and beams.
  • FIG 1 and FIG 4 described above are conveniently manufactured by roll forming a metal strip according to the steps depicted in FIG 7.
  • the step of forming a tube is optional since the hollow flange section can be formed directly from the strip. There may be advantage in forming tube on a separate roll forming line prior to formation of the hollow flange section.
  • the base member and cavity base are welded in a welding station.
  • the formed hollow section then passes a finishing section where it is painted and cut to length, as required.
  • FIG 8. A third embodiment of the hollow flange section is shown in FIG 8.
  • This hollow flange section 40 can be conveniently formed by a similar process as described above.
  • a flat strip or tube is rolled to form enclosed volumes 41.
  • the enclosed volumes are defined by the base member 42, lateral support members 43 and cavity walls 44.
  • the cavity 45 is defined by the cavity base 46 and cavity walls 44.
  • the cavity base 46 and base member 42 are welded at 47 to complete the hollow flange section.
  • Other shapes for the enclosed volume are also possible.
  • FIG 9. A fourth embodiment of the hollow flange section is shown in FIG 9.
  • the hollow flange section 50 is conveniently formed from a flat strip by the process described above, although the optional step of tube forming is not available.
  • the flat plate is bent in a series of roll forming stations to turn the extremities over to form enclosed volumes 51.
  • the enclosed volumes are defined by the base member 52, lateral support members 53 and cavity walls 54.
  • the cavity 55 is defined by the base member 52 and cavity walls 54.
  • Welds 56 complete the hollow flange section 50.
  • welding of a terminating edge of a strip to a continuing face of a strip has proven problematic.
  • the preferred method of welding two strip edges together is induction welding.
  • induction welding is less successful for welding a strip edge to a strip face due to dissipation of current and heat in the face.
  • the inventors have solved the problem by pre-heating the face.
  • the hollow flange section can also be formed from two components as shown in FIG 10.
  • a hollow flange section 60 comprises a base component 61 that is roll formed to make a base member 62 and lateral support members 63.
  • a separate cavity 64 is formed as a U section having cavity walls 65 and cavity base 66.
  • the base component 61 and cavity 64 are then welded at 67 to form the hollow flange section 60.
  • Embodiments of the hollow flange section of FIG 4 can also be formed from a flat plate. Two examples are shown in FIG 11 and FIG 12. In both examples a flat plate is shaped in a series of roll forming stations and then welded to complete a hollow flange section.
  • Composite structural components fabricated from two hollow flange sections and an interconnecting web provide better strength for mass characteristics than existing components and therefore represent a significant economic benefit for the building industry.
  • the advantage of the composite structural component is exemplified in FIG 13 which plots the bending capacity of a standard joist and a joist utilizing the hollow flange section for a range of standard joist sizes. As is clearly seen in the plot, the composite structural component always outperforms the conventional component.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Rod-Shaped Construction Members (AREA)

Abstract

Section à bride creuse (1) formée d'une cavité ouverte (4) définie par une paire de parois opposées (5) et une base (6). Deux volumes fermés sont formés au voisinage de la cavité par des éléments supports latéraux (3) s'étendant à partir d'un élément de base (2) de manière à intersecter chaque paroi (5) de la cavité. La base (6) et l'élément de base (2) forment une structure intégrale résistant à la déformation en biais. Les volumes fermés permettent d'obtenir un support de construction conférant une plus grande résistance à la section à bride creuse. L'invention concerne également une poutre composite formée à partir d'une paire de sections à bride creuse avec âme intermédiaire. La poutre composite présente, pour une masse moindre, une plus grande résistance que des poutres composites comparables de l'état connu de la technique.
PCT/AU1998/000756 1997-09-16 1998-09-16 Section a bride creuse WO1999014451A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CA002303965A CA2303965C (fr) 1997-09-16 1998-09-16 Section a bride creuse
AU90550/98A AU724555B2 (en) 1997-09-16 1998-09-16 Hollow flange section
NZ503353A NZ503353A (en) 1997-09-16 1998-09-16 Hollow flange section having a channel between ramp portions
HK00107998A HK1028629A1 (en) 1997-09-16 2000-12-13 A hollow flange section, a forming process of the hollow flange section, and a composite structural member

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPO9227A AUPO922797A0 (en) 1997-09-16 1997-09-16 Hollow flange section
AUPO9227 1997-09-16

Publications (1)

Publication Number Publication Date
WO1999014451A1 true WO1999014451A1 (fr) 1999-03-25

Family

ID=3803510

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1998/000756 WO1999014451A1 (fr) 1997-09-16 1998-09-16 Section a bride creuse

Country Status (6)

Country Link
CN (1) CN1107779C (fr)
AU (1) AUPO922797A0 (fr)
CA (1) CA2303965C (fr)
HK (1) HK1028629A1 (fr)
NZ (1) NZ503353A (fr)
WO (1) WO1999014451A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001086088A1 (fr) * 2000-05-09 2001-11-15 AL KARIM CONTRACTING (Australia) PTY LTD Procede de formation d'une ame pour element de structure
ITBO20080754A1 (it) * 2008-12-18 2010-06-19 Lynx S R L Dispositivo a trave modulare
CN102371294A (zh) * 2010-08-17 2012-03-14 刘梅秋 高效卷板机
ITVI20130004A1 (it) * 2013-01-14 2014-07-15 Cover Technology S R L Trave reticolare per strutture multifunzionali mobili o stazionarie nonche' struttura comprendente tale trave

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA200510240B (en) * 2003-06-23 2007-03-28 Smorgon Steel Litesteel Prod An improved beam
CN112681608B (zh) * 2020-12-22 2022-07-05 山东三云建筑科技有限公司 一种冷弯薄壁空心工字钢
CN115126156B (zh) * 2022-06-13 2023-06-27 珠海采筑电子商务有限公司 一种装配式活动房的承重柱及施工方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2366848A (en) * 1948-10-15 1948-12-16 Improvements inbuilt-up structural elements
AU3972089A (en) * 1988-07-27 1990-02-19 Smorgon Steel Litesteel Products Pty Ltd Structural member and process for forming same
AU5207493A (en) * 1992-11-30 1994-06-09 Bluescope Steel Limited Sheet metal structural member
US5644888A (en) * 1993-01-21 1997-07-08 Ebert Composites Corporation Heavy construction system using composite members
AU1473397A (en) * 1996-03-01 1997-09-04 David John Bell Hollow flange structural element

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2366848A (en) * 1948-10-15 1948-12-16 Improvements inbuilt-up structural elements
AU3262957A (en) * 1958-11-04 1959-05-07 Charles Davis Limited A fabricated girder
AU5998869A (en) * 1968-11-29 1971-03-04 Siderurgica Occidental, Ca Structural shapes and process for the production thereof
AU3972089A (en) * 1988-07-27 1990-02-19 Smorgon Steel Litesteel Products Pty Ltd Structural member and process for forming same
AU5207493A (en) * 1992-11-30 1994-06-09 Bluescope Steel Limited Sheet metal structural member
US5644888A (en) * 1993-01-21 1997-07-08 Ebert Composites Corporation Heavy construction system using composite members
AU1473397A (en) * 1996-03-01 1997-09-04 David John Bell Hollow flange structural element

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001086088A1 (fr) * 2000-05-09 2001-11-15 AL KARIM CONTRACTING (Australia) PTY LTD Procede de formation d'une ame pour element de structure
ITBO20080754A1 (it) * 2008-12-18 2010-06-19 Lynx S R L Dispositivo a trave modulare
CN102371294A (zh) * 2010-08-17 2012-03-14 刘梅秋 高效卷板机
ITVI20130004A1 (it) * 2013-01-14 2014-07-15 Cover Technology S R L Trave reticolare per strutture multifunzionali mobili o stazionarie nonche' struttura comprendente tale trave

Also Published As

Publication number Publication date
CN1107779C (zh) 2003-05-07
CA2303965C (fr) 2006-06-13
NZ503353A (en) 2000-06-23
CN1270652A (zh) 2000-10-18
AUPO922797A0 (en) 1997-10-09
HK1028629A1 (en) 2001-02-23
CA2303965A1 (fr) 1999-03-25

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