WO2000037745A1 - Element structurel d'ossature de systemes de planchers suspendus - Google Patents

Element structurel d'ossature de systemes de planchers suspendus Download PDF

Info

Publication number
WO2000037745A1
WO2000037745A1 PCT/AU1999/001144 AU9901144W WO0037745A1 WO 2000037745 A1 WO2000037745 A1 WO 2000037745A1 AU 9901144 W AU9901144 W AU 9901144W WO 0037745 A1 WO0037745 A1 WO 0037745A1
Authority
WO
WIPO (PCT)
Prior art keywords
web
members
elements
elongate
framing system
Prior art date
Application number
PCT/AU1999/001144
Other languages
English (en)
Inventor
Bradbury Frank Golledge
Original Assignee
Bradbury Frank Golledge
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 Bradbury Frank Golledge filed Critical Bradbury Frank Golledge
Priority to AU24226/00A priority Critical patent/AU2422600A/en
Publication of WO2000037745A1 publication Critical patent/WO2000037745A1/fr

Links

Classifications

    • 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
    • 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
    • E04C2003/0486—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

  • the present invention relates to improvements in elongated structural members for use in load bearing frameworks that form a floor system and, in particular, to steel structural members which are ideally joined together and to connecting structural elements, flooring, linings and the like, by nailing.
  • the framework of the present invention is primarily used in relation to floor systems in domestic housing, but can be equally applicable to many different types of applications and to many different types of buildings and the steel structural members are preferably cold formed by roll forming.
  • Conventional floor framing systems usually include bearers and joists, which run transverse to each other, and flooring, being of either sheet or board running substantially transverse to the floor joists.
  • floor systems require joists to span long distances, such as in the case of an elevated floor where joists span across supporting wall structures, it is typical to employ trussed floor joists which have two parallel chord members interconnected with web members.
  • known trussed floor joist assemblies have advantages such that services such as plumbing, electrical and other cables, air conditioning ducts, etc can pass transverse to the joists ameliorating the need to drill through a solid joist member or without protruding through the ceiling line of the space below.
  • higher strength to weight ratio results in overall joist assemblies which weigh less than solid joist members with comparative spanning capabilities, therefore their light weight nature makes construction easier.
  • Known frameworks exist that have timber chord members interconnected via steel webs which have integral nail plate areas formed into their extremities. These nail plate areas fasten into the side faces of the timber chord members, thus requiring attachment of webs to both sides of the framework.
  • the effective nail plate area is determined by the depth of the timber chord member.
  • the length of the nail plate area is limited by design factors relating to the distance between webs and the eccentricity of load transferred into the web member.
  • the size of the nail plate area required to support the necessary loads can govern the material content in the webs themselves, or conversely, the material content in the web determines the allowable load that can be transmitted by the web members. It is thus desirable to firstly have web members loaded concentrically and secondly, to provide adequate connection capacity whilst allowing economic structural design of web members.
  • Known joist frameworks that have cold formed steel structural members are typically formed from conventional Cee section members such that the web members nest in the chord members, or of "top hat” chord members with various different web sections being able to nest between webs of the top hat section.
  • All known prior art arrangements that include cold formed steel members are dependent upon substantially similar overall dimensions between the chord and the web members to enable nesting. This nesting feature of known prior art arrangements facilitates structural joints through the installation of a fastening means between adjacent surfaces of the members, ie flange element to flange element in the case of Cee sections, and between each of the web elements of a top hat chord member and an adjacent flange element of the web member.
  • chord and web members of a trussed floor joist have different functions and design requirements, and as such it would be desirable if within feasible geometrical parameters each were designed optimally to suit its separate function. Therefore it is desirable to optimally design each section for its intended purpose
  • chord and web members It is also desirable to minimise capital expenditure on manufacturing equipment, particularly by utilising one roll former to produce both chord and web members.
  • Known timber frameworks that use steel web members require different processes to produce the chord and web members.
  • A cross-sectional area of chord members
  • d distance between centroids of chord members
  • I ⁇ the cross-sectional area of the chord members, A, or the distance between the centroids of the chord members, d, can be increased, but clearly what has most impact is d.
  • the distance between the centroids of the chord members, d must always be less than the overall depth of the truss, D, which is generally standardised according to building dimensional parameters. Therefore, it is desirable to have the centroid of the chord member as close to the extremity of the depth dimension of the truss as possible, ie,
  • chord members that have a continuous element that forms the extremity and defines the depth of the framework. Therefore it is seen that it is seen that it is advantageous to provide a chord member that has sufficient width that forms the extremities of the framework and concentrating the material content of the chords at the extremities of the framework, thus maximising the section property of the framework, and, providing elements that enable the use of web members that are not substantially the same width as the width of the extreme element of the chord member.
  • chord members which have a single layer of material at the extremities of the framework do not provide adequate restraint to nails used to attach flooring. It is therefore desirable to provide such restraint within the elements of the chord members.
  • the present invention has been conceived out of the need to provide a structural framework and components thereof, which lowers the cost of the structural framework in floors, by maximising section property to mass ratio, lowering the acquisition costs of the manufacturing equipment to produce the members, and lowering the required cost and time of manufacture by providing a method of assembly from one side of the framework. It is the object of the present invention to provide a structural framework, particularly a floor framing system, including the types of components used and their method of assembly and construction, which substantially overcomes or ameliorates the aforementioned disadvantages with known systems. At the very least the object of the present invention is to provide an alternative to known systems.
  • a floor framing system for a building including a plurality of elongate load bearing framework members which are supported by the building or foundations thereof, and which support flooring material, ceiling linings, battens or other like ceiling framing members, said elongate load bearing framework members having at least two elongate structural members and at least one structural web member extending between said elongate structural members, wherein said elongate structural members have at least one web element which is substantially upright and at least one flange element which is perpendicular to said web element and said at least one web structural member has at least one web element which is substantially upright and at least one flange element which is perpendicular to said web element, whereby the at least one web elements of said web structural members mate with said at least one web elements of said elongate structural members such that connection means can be applied at the mating locations.
  • the elongate structural members resemble an inverted top-hat section with two flange elements and two web elements with a third web element perpendicular to and adjoining the two web elements.
  • the third web elements of at least the elongate structural members is/are preferably discontinuous to allow the web elements to mate.
  • the discontinuities are formed by notches or openings in the third web element which allows the web element of the web structural member to protrude therethrough.
  • the elongate structural web members resemble an inverted top-hat section with two flange elements and two web elements with a third web element perpendicular to and adjoining the two web elements.
  • the elongate structural web members resemble a box section with a slit in one side with two flange elements being separated by the slit, two web elements with a third web element perpendicular to and adjoining the two web elements.
  • the slit is the result of curling the edges of the flanges.
  • the ends of the web elements of the elongate web members are notched such that the flange elements of the web members enclose the web elements of the elongate structural members.
  • the elongate structural web members is bent into a vee profile, and the bending of the elongate structural web members is facilitated by the provision of a slot intermediate the ends of the members.
  • the longitudinal central axes of the elongate structural members and the structural web member(s) are substantially aligned centrally.
  • the elongate structural web members are either perpendicular to or diagonal to the elongate structural members.
  • the elongate structural members are substantially parallel, and/or the elongate structural members are substantially in the same plane and form triangular or trapezoidal framework geometries.
  • the flanges of the elongate structural members are extended and over bent flange stiffening elements.
  • the floor system is stiffened by at least one stiffening member oriented substantially perpendicular to the longitudinal axes of the elongate structural members.
  • the elongate structural members also known as chord members
  • chord members have holes in the central flange element such that the web elements thereof enclose the flange elements of the web members, with the resulting adjacent mating surfaces providing for a connection means between the members.
  • This preferred arrangement comprises a double web joined such that it forms a "Nee" and which is flexible about the bend, thus reducing the number of individual components, allowing installation of two webs at the same time, providing for different web angle arrangements, and allowing the installation of the webs between the adjacent chord member elements whilst remaining firmly constrained in the assembly jig.
  • a preferred web member comprises abutting flange lip stiff eners that are curled, each one in opposing crests and valleys, such that when a load is applied in the direction across the lip stiffeners, they do not lap or slide over each other, resulting in local distortion of the section.
  • the web members have their web elements notched at the extremities such that the flange elements of the web members enclose the web elements of the chord members, with the adjacent mating surfaces providing for a connection means between the members.
  • This preferred form allows either individual or joined web members, whether a double web or a multiple greater than one, to be installed into the framework by sliding from one end along the chord members to the required location. This can be done at either a bend in a multiple web component member, such that the continuous flange elements of the web member nest over the webs of the chord member as described above, or when the free ends of adjacent web members are lapped at the junction with the chord member whereby only one fastening means is required to adequately form the joints.
  • This preferred form of the web member is sufficiently similar in cross-section to the chord member such that they can both be manufactured by the same equipment.
  • chord members resemble an inverted top-hat section and the web members form in the structural framework member is zig-zag like.
  • the depth of the structural framework members can vary according to design and geometrical requirements, but in a floor system comprising a plurality of structural framework members the depth is substantially consistent.
  • chord members comprise extended and over-bent flange stiffening elements that act as stabilisers for connection means such as in the fixing of flooring material.
  • the floor system that comprises a plurality of structural framework members is stiffened by at least one structural stiffening member oriented substantially perpendicular to the length of the elongate structural framework members.
  • this stiffening member comprises the same chord and web members of the plurality of structural framework members.
  • the distance between the chord members of the structural framework member is substantially the same as the overall depth of transverse beams, stiffening members and the like, such that it is not necessary to block out and/or cut or notch the chord members, or provide brackets for fixing to beam flanges.
  • the beam member is a composite of more than one of the framework members whereby the entire floor system is of the same depth without blocking and with substantially consistent properties between joist and beam members in relation to fixing of flooring and ceiling linings.
  • a floor framing system for a building including a plurality of elongate load bearing framework members which are supported by the building or foundations thereof, and which support flooring material, ceiling linings, battens or other like ceiling framing members, said elongate load bearing framework members having at least two elongate structural members and at least one structural web member extending between said elongate structural members, wherein said elongate structural members have at least one web element which is substantially upright and at least one flange element which is perpendicular to said web element and said at least one web structural member has at least one flange element which is substantially upright and at least one web element which is perpendicular to said flange element, whereby the at least one flange elements of said web structural member mate with said at least one web elements of said elongate structural members such that connection means can be applied at the mating locations.
  • the elongate structural web members resemble an inverted Cee section with two flange elements and one web elements.
  • Fig. 1 is a cutaway perspective view of a elongate structural framework member of a preferred embodiment
  • Fig. 2 is a section view A-A of a chord member of the elongate structural framework member in Fig. 1 ;
  • Fig. 3 is a cutaway perspective view of the chord member of the elongate structural framework member in Fig. 1 ;
  • Fig. 4 is a plan view A of the chord members of the elongate structural framework member in Fig. 1 showing a preferred notching arrangement;
  • Fig. 5 is a cutaway perspective view of a preferred embodiment of the web member of the elongate structural framework member in Fig. 1 showing a preferred notching arrangement;
  • Fig. 6 is a cutaway perspective view of another preferred embodiment of the web member of the elongate structural framework member in Fig. 1 showing curling of the flange lip stiffeners;
  • Fig. 7 is a section view B-B of the web member of the elongate structural framework member in Fig. 1 ;
  • Fig. 8 is an side view of a flexibly joined double web member of the elongate structural framework member in Fig. 1 ;
  • Fig. 9 is a perspective view of another preferred embodiment of a web member
  • Fig. 10 is a detail showing the connection of the web member of Fig. 9 to a chord member
  • Fig. 11 is a section view C-C of the web member of Fig. 9.
  • Fig. 12 is a cutaway side view detail of a preferred embodiment of the connections at the end of an elongate structural framework member
  • Fig. 13 is an end view detail of a preferred embodiment of the connections at the end of an elongate structural framework member
  • Fig. 14 is a cutaway detail showing an embodiment of a transverse stiffening member and fixing to an elongate structural framework member;
  • Fig. 15 is a section view D-D of preferred embodiments of a detail of Fig. 14;
  • Fig. 16 is another section view D-D of preferred embodiments of a detail of Fig. 14;
  • Fig. 17 is a view B detail of Fig. 16 showing an end notch of a vertical web member
  • Fig. 18 is a partial end view of an elongate structural framework member showing fixture to wall support structures
  • Fig. 19 is a partial sectional view of an elongate structural framework member showing fixture of flooring material to the top chord member;
  • Fig. 20 is similar to Fig. 19, but shows a butt joint of the flooring material
  • Fig. 21 is a plan view showing fixture flooring material to the top chord, particularly staggering of the fastening means
  • Fig. 22 is a partial sectional view of an elongate structural framework member showing fixture of ceiling lining to the bottom chord member;
  • Fig. 23 is a perspective view of a clip that can be used for centre fixing of ceiling lining to the bottom chord member;
  • Fig. 24 is similar to Fig. 23, but shows centre fixing of ceiling linings
  • Fig. 25 is a cutaway perspective view of another embodiment showing a transverse stiffening member and fixing to an elongate structural framework member;
  • Fig. 26 is a side view of the arrangement of Fig. 25;
  • Fig. 27 is a section E-E of Fig. 25;
  • Fig. 28 is a side view similar to Fig. 26 but showing two bent web members
  • Fig. 29 is a perspective view of the bent web member of the embodiment as shown in Fig. 25;
  • Fig. 30 is a side view of the web member of Fig. 29;
  • Fig. 31 is a section F-F of Fig. 30;
  • Fig. 32 is a detailed view G of Fig. 30;
  • Fig. 33 is a section view of an alternative to the web element of Fig, 29.
  • Fig. 34 is a section view the chord member of Fig. 25.
  • An elongate structural framework member 10 as shown in Fig. 1 is formed as a parallel chord truss having a pair of parallel elongate structural or chord members 11(a) and (b) with a web structure 13 therebetween being formed by vertical web members 13(a) and flexibly joined double web members 13(b), therebetween.
  • the chord members 11 in this embodiment as seen in Figs. 2 and 3 resemble an inverted top hat having two upright web elements 14(a) and (b) joined by a perpendicular web element 14 (c) in the form of a U with two flange elements 15(a) and (b) extending from the web elements 14(a) and (b) and having extended and over bent stiffening elements 16(a) and (b).
  • the flexibly joined double web members 13(b), as seen in Figs. 5, 7 and 8 resemble a box section with a slit 17 in one side with two flange elements 18(a) and (b) being separated by the slit 17, and with two web elements 19(a) and (b) with a third web element 19(c) perpendicular to and adjoining the two web elements 19(a) and (b).
  • Another embodiment is shown in Fig. 6 where the slit 17 is the result of curling the edges of the flange elements 18(a) and (b) in opposing fashion forming a rigid member, particularly for the purpose of installing fasteners across the member for joining purposes.
  • the flexibly joined double web members 13(b) are able to be bent as seen in Fig. 8 by the provision of a notch 20 in the two flange elements 18(a) and (b) and partially in the two web elements 19(a) and (b) to form an apex 21.
  • chord members 11 (a) and (b) have spaced apart notches or openings 22 in the web element 19(c).
  • the notches 22 are provided to receive either the free ends 23 of the flexibly joined double web members 13(b) or the vertical web member 13(a), or the apex 21 of the bent flexibly joined double web members 13(b). Only a half notch 22(a) is required at the end 24 of the chord member 11(a) as seen in Fig. 1 where the vertical web member 13(a) is received.
  • Fig. 4 shows the relative location of the notches 22 in the top and bottom chord members 11(a) and (b) respectively.
  • the joints between the chord members 11(a) and (b) and the vertical web members 13(a) and flexibly joined double web members 13(b) are formed by the two web elements 19(a) and (b) of the web members 13(b) nesting within the web elements 14(a) and (b) of the chord members 11(a) and (b) such that the inside surfaces of the web elements 14(a) and (b) of the chord members 11(a) and (b) abut against the outside surfaces of the two web elements 19(a) and (b) of the web members 13(b) with a fastener 25 (preferably a nail) completing the joint.
  • a fastener 25 preferably a nail
  • FIG. 11 Another embodiment of the flexibly joined double web members 26 (corresponding to 13(b)), is illustrated in 9 to 11.
  • the web members 26 resemble an inverted top hat having two upright web elements 27(a) and (b) joined by a perpendicular web element 27(c) in the form of a U with two flange elements 28(a) and (b) extending from the web elements 27(a) and (b).
  • the entire web member is bent at 29 into a Vee form that represents a double joined web member 26.
  • the free ends 30 of such a double web members 26 are notched to enable nesting over the web elements 14(a), (b) and (c) of the chord members 11(a) and (b) as shown in Fig. 10.
  • the bend 29 is formed such that it also nests over the web elements 14(a), (b) and (c) of the chord members 11(a) and (b) of the chord member in the way described, thus allowing a single fastener 25 to fix the web members 26 to the chord members 11(a) and (b).
  • Such a configuration of the web members 26 also provides a means for installing web members 26 by sliding along the chord members 11 (a) and (b) to the position required.
  • the cross-section of the web member of Fig. 11 is substantially similar to that of the chord members 11(a) and (b), thus enabling manufacture of both sections from the same roll former.
  • the fastener 25 When the fastener 25 is installed in either of these preferred embodiments, it provides a shear connection between the members at two distinct points along the shank at locations 31 and 32 as seen in Fig. 10.
  • a number of elongate structural framework members 10 can be tied to a transverse stiffening member 33 as shown in Fig. 14.
  • a vertical web member 34 is joined to the outside surface of the web element 14(a) or (b) of the chord member 11(a) by a fastener 25 as shown in section D-D of Figs. 15 and 16 respectively.
  • View B of Fig. 17 shows how the end of the vertical web member 34 is notched to provide the joint shown in Fig. 16, where the fastener 35 penetrates through the chord member at location 36.
  • the transverse stiffening member 33 is joined to the vertical web member 34 by fastener 37 and to the chord member 11(a) by fastener 38.
  • Fig. 18 the elongate structural framework member 10 is joined to a supporting wall structure 39 by fastener 40 installed through the over bent stiffening elements 16(a) and (b) and flange elements 15(a) and (b) of the bottom chord member 11(b).
  • Flooring material 41 is attached to the top chord member 11(a) of the elongate structural framework member 10 as shown in Figs. 19 to 21 by fasteners 42, preferably nails, which penetrate the flange elements 15(a) and (b) and over bent stiffening elements 16(a) and (b), and necessary adhesive 43.
  • the stiffening elements 16(a) and (b) provide support for the fastener 42 at location 43.
  • a butt joint 44 is shown in Fig. 20, where one flooring sheet or board 45 is attached to one flange element 15(a) of the top chord member 11(a) and the abutting flooring sheet or board 45 is attached to the second flange element 15(b) of the top chord member 11(a).
  • Intermediate fixing 46 of floor sheeting 45 is staggered across the two flange elements 15(a) and (b) of the top chord member 11(a).
  • Ceiling linings 47 can be attached to the bottom chord member 11(b) of elongate structural framework members 10 by fasteners 48 and necessary adhesive 49 as shown in Fig. 22.
  • a clip 50 can be used to snap over the flange and lip elements 15(a)/16(a) and 15(b)/16(b) of the bottom chord member 11(b) where fastener 48 is required centrally.
  • the framework 50 is formed as a parallel chord truss having a pair of parallel elongate structural or chord members 51(a) and (b) with a web structure 13 therebetween being formed by vertical web members 53(a) and bent web members 53(b), therebetween.
  • the lower chord member 51(b) is shown seated on bearers 54 whilst a transverse stiffening member 55 is fastened thereto in a similar manner as described previously.
  • the bent web members 53(b) as seen in Fig.s 29 to 32 are Cee sections with a web element 56 and two flange elements 57 extending therefrom.
  • the web member 53(a) is bent, preferably by a pipe bender or the like, and a bulge 58 is developed at the bend 59 in the web element 56.
  • Notches 61 are provided at the free ends so that the bent web member 53(a) nests against the chord member 51(b).
  • FIG. 33 A variation of the bent web member 53(b) is shown in Fig. 33 which has rolled over edges 62.
  • chord members 51 are shown in Fig, 34.

Landscapes

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

Abstract

Ce système d'ossature de plancher comprend plusieurs éléments porteurs de charge (10), de forme allongée, supportés par le bâtiment ou les fondations de celui-ci, et qui portent le matériau du plancher ou analogue. Ces éléments d'ossature présentent au moins deux membrures structurelles (11a, 11b), de forme allongée, et au moins un montant structurel de treillis (13a, 13b) s'étendant entre les membrures (11a, 11b), lesquelles comportent au moins un élément d'âme sensiblement vertical, et au moins une aile perpendiculaire à l'élément d'âme vertical. Le montant structurel de treillis (13a, 13b) présente au moins un élément sensiblement vertical et au moins un élément de rebord perpendiculaire à l'élément vertical, de sorte qu'au moins un des éléments de treillis puisse s'emboîter dans l'âme d'au moins une membrure de forme allongée, de manière à permettre l'application de moyens de raccordement au niveau des emplacements de cet emboîtement (22a).
PCT/AU1999/001144 1998-12-22 1999-12-22 Element structurel d'ossature de systemes de planchers suspendus WO2000037745A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU24226/00A AU2422600A (en) 1998-12-22 1999-12-22 Structural framework member for suspended floor systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPP7827A AUPP782798A0 (en) 1998-12-22 1998-12-22 Structural framework member for suspended floor systems
AUPP7827 1998-12-22

Publications (1)

Publication Number Publication Date
WO2000037745A1 true WO2000037745A1 (fr) 2000-06-29

Family

ID=3812031

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1999/001144 WO2000037745A1 (fr) 1998-12-22 1999-12-22 Element structurel d'ossature de systemes de planchers suspendus

Country Status (2)

Country Link
AU (1) AUPP782798A0 (fr)
WO (1) WO2000037745A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6758022B1 (en) 1999-08-25 2004-07-06 Mitek Holdings, Inc. Structural framework and webs therefor
US6834470B2 (en) 2001-07-27 2004-12-28 Mitek Holdings, Inc. Structural framework, method of forming the framework and webs therefor
WO2010144261A1 (fr) * 2009-06-09 2010-12-16 Illinois Tool Works Inc. Construction de fermes pour toits et planchers
EP2715250A1 (fr) * 2011-05-24 2014-04-09 Magna International Inc. Ensemble cadre de support et procédé permettant de former un ensemble cadre de support
US20220098895A1 (en) * 2020-07-17 2022-03-31 Granite Industries, Inc. Elevated flooring system for clearspan tent

Citations (4)

* 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
SU647427A1 (ru) * 1977-05-03 1979-02-15 Казанский инженерно-строительный институт Ферма
AU2354484A (en) * 1983-01-17 1984-07-19 Hambro International (Structures) Limited Double top chord
US4937998A (en) * 1988-06-17 1990-07-03 Howard Goldberg Structural member

Patent Citations (4)

* 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
SU647427A1 (ru) * 1977-05-03 1979-02-15 Казанский инженерно-строительный институт Ферма
AU2354484A (en) * 1983-01-17 1984-07-19 Hambro International (Structures) Limited Double top chord
US4937998A (en) * 1988-06-17 1990-07-03 Howard Goldberg Structural member

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 197946, Derwent World Patents Index; Class Q44, AN 1979-K7231B/46 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6758022B1 (en) 1999-08-25 2004-07-06 Mitek Holdings, Inc. Structural framework and webs therefor
US6834470B2 (en) 2001-07-27 2004-12-28 Mitek Holdings, Inc. Structural framework, method of forming the framework and webs therefor
WO2010144261A1 (fr) * 2009-06-09 2010-12-16 Illinois Tool Works Inc. Construction de fermes pour toits et planchers
EP2715250A1 (fr) * 2011-05-24 2014-04-09 Magna International Inc. Ensemble cadre de support et procédé permettant de former un ensemble cadre de support
EP2715250A4 (fr) * 2011-05-24 2014-11-19 Magna Int Inc Ensemble cadre de support et procédé permettant de former un ensemble cadre de support
US20220098895A1 (en) * 2020-07-17 2022-03-31 Granite Industries, Inc. Elevated flooring system for clearspan tent
US11454042B2 (en) * 2020-07-17 2022-09-27 Granite Industries, Inc. Elevated flooring system for clearspan tent
US11725413B2 (en) 2020-07-17 2023-08-15 Granite Industries, Inc. Elevated flooring system for clearspan tent

Also Published As

Publication number Publication date
AUPP782798A0 (en) 1999-01-21

Similar Documents

Publication Publication Date Title
US7587877B2 (en) Cold-formed steel joists
US5553437A (en) Structural beam
US5904025A (en) Method for reinforcing a structural frame
US7086208B2 (en) Structural member for use in the construction of buildings
CA2667892C (fr) Poutrelles en acier formees a froid supportant des membrures inferieures
US20040074178A1 (en) Joist support apparatus
EP0039141B1 (fr) Système pour toits
AU2001276042A1 (en) Structural member for use in the construction of buildings
US20100139201A1 (en) Cold-formed steel joist
WO1991017328A1 (fr) Poutre structurelle
US11459755B2 (en) Concrete fillable steel joist
CA2455071C (fr) Solive segmentee formee a froid
WO2000037745A1 (fr) Element structurel d'ossature de systemes de planchers suspendus
US7418807B1 (en) Decking
US11898351B2 (en) Joist tie used in structural decking systems and method of installing
AU2422600A (en) Structural framework member for suspended floor systems
CA2542848C (fr) Poutrelles en acier formees a froid supportant des membrures superieures
AU2012200960B2 (en) Lower chord bearing cold-formed steel joists
US20240183157A1 (en) Joist tie used in structural decking systems and method of installing
AU8952098A (en) Fastening system for structural framing elements
AU746401B2 (en) A framing system for buildings
AU2008201614A1 (en) Lower chord bearing cold-formed steel joists
EP0990077A1 (fr) Systeme de cadre pour batiments
AU1827701A (en) Floor joist system and support member therefor

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AL AM AT AU AZ BA BB BG BR BY CA CH CN CR CU CZ DE DK DM EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 24226/00

Country of ref document: AU

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
WWE Wipo information: entry into national phase

Ref document number: 09869188

Country of ref document: US