WO1996005384A1 - Fermes de charpente - Google Patents

Fermes de charpente Download PDF

Info

Publication number
WO1996005384A1
WO1996005384A1 PCT/AU1995/000506 AU9500506W WO9605384A1 WO 1996005384 A1 WO1996005384 A1 WO 1996005384A1 AU 9500506 W AU9500506 W AU 9500506W WO 9605384 A1 WO9605384 A1 WO 9605384A1
Authority
WO
WIPO (PCT)
Prior art keywords
chords
truss
building truss
struts
building
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.)
Ceased
Application number
PCT/AU1995/000506
Other languages
English (en)
Inventor
James Raymond Cole
John King
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BYNTECH PTY Ltd
TANNING Pty Ltd
Original Assignee
BYNTECH PTY Ltd
TANNING 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 BYNTECH PTY Ltd, TANNING Pty Ltd filed Critical BYNTECH PTY Ltd
Priority to AU31586/95A priority Critical patent/AU3158695A/en
Publication of WO1996005384A1 publication Critical patent/WO1996005384A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • E04C3/11—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with non-parallel upper and lower edges, e.g. roof trusses
    • 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 a building truss.
  • Building trusses are typically triangular in shape with a bottom chord and two angled top chords meeting at an apex to define the roofline. The top and bottom chords are linked by struts which criss-cross the triangular profile. All trusses are usually similar in shape but made from different materials i.e. timber and steel.
  • Figs. 1 and 2 illustrate prior art trusses with Fig. 1 showing a steel truss and Fig. 2 showing a wooden truss.
  • Fig. 1 truss 10 comprises a bottom chord 12 and top chords 14,16 angled to form apex 18.
  • chords 12, 14,16 are formed from Z-shaped profile steel members. Top chords 14,16 abut at apex 18 and are welded together. Bottom chord 12 is welded to top chords 14,16 respectively at 20,22. Struts 24 link top chords 14, 16 to bottom chord 12 and are secured by welding.
  • Struts 24 are typically of a U-shape profile.
  • Strengthening plates 26 are welded at the opposing corners of truss 10.
  • Connection elements 28 are welded to truss 10 to allow attachment to the wall top plate/stud (eaves).
  • the problems associated with this type of truss are numerous.
  • the truss must be prefabricated off-site and transported. Transportation can involve damage to the truss. The manufacture is very labour intensive and can be dangerous. Welding involves fumes and a dirty environment which contributes to accidents. Welding equipment must also be available on-site to repair any transportation damage.
  • Truss 10A has top chords 14A,16A; bottom chord 12A and struts 24A formed from timber members. The struts 24A abut against the inner faces 30,32 of top chords 14A, 16A and inner face 34 of bottom chord 12A.
  • the truss 10A is set up in a jig (not shown) and secured together by clinches 36 on both sides of the truss.
  • the truss 10A in Fig. 2 has problems in that again it must be prefabricated in a factory and brought to the site in its assembled form. Broken clinches are often not noticed until tiles are applied. Accordingly, an expensive portable clinching gun must be available at the site.
  • a further object of the invention is to provide a truss which can be supplied in an unassembled form to a site.
  • Yet another object of the invention is to provide a steel truss which requires no welding.
  • the invention in a preferred aspect may provide a building truss including top and bottom chords and struts linking said chords, said chords and struts being formed of metal sections and secured together by threaded fasteners.
  • chords and struts are formed of C-shaped sections and are secured together by screws.
  • adjacent ends of the chords are coupled together by a link bridging said adjacent ends and is screwed to said adjacent ends.
  • link is formed of a C-shaped metal section.
  • Fig. 1 is a side view of a prior art steel truss
  • Fig. 2 is a side view of a prior art wooden truss
  • Fig. 3 is a side view of a first embodiment of a truss made in accordance with the invention
  • Fig. 4 is a cross-sectional view along and in the direction of arrows 4-4 shown in Fig. 3;
  • Fig. 5 is an enlargement of the area circled by 5 in Fig. 3;
  • Fig. 6 is an enlargement of the area circled by 6 in Fig. 3, and
  • Fig. 7 is a side view of a second embodiment of a truss made in accordance with the invention.
  • truss 10B is formed of C-shaped metal sections which have a flat base 40 and right angled sides 42,44. Right angle lips 46,48 are located opposite one another.
  • the bottom chord 12B, top chords 14B, 16B and struts 24B are all formed from the same shaped metal section.
  • the prior art truss shown in Fig. 1 has differing profiles for the chords and struts.
  • the C-shape profile is stronger than the Z-shaped profile.
  • the top chords 14B, 1 6B do not have their apex ends abutting as in the prior art.
  • each chords 12B, 14B, 16B all face the same direction.
  • Struts 24B are not welded to chords 12B, 14B, 16B but are secured by threaded fasteners 50 by abutting respective flat bases 40.
  • self drilling screws for example, TEK screws are the preferred securing means. Nuts and bolts could also be substituted.
  • the TEK screws are preferred because they are self drilling screws with a screw washer head that are readily available and are dispensed with an easy to use gun e.g. SCRUGUN ® power screwdrivers by BLACK & DECKER.
  • a link 52 bridges the adjacent ends of top chords 14B, 16B.
  • Link 52 is of the same profile as chords 14B,16B and is secured by screws 50.
  • Link 52 is secured parallel to bottom chord 12B and is positioned to optimise the loading on the truss. The number of screws 50 used and positioned thereof can vary depending on loadings on the truss.
  • Bottom chord 12B has part of right angled sides 42,44 at either end removed to ensure that the flat base 40 thereof lies against top chords 14B, 16B. This will provide an interlock when screws 50 are fastened thereto.
  • Fig. 6 clearly illustrates this assembly.
  • the invention allows truss 10B to be supplied in a complete knock down (CKD) form or partly pre-assembled form which substantially reduces transportation costs.
  • CKD complete knock down
  • the components of the truss can be cut to length prior to delivery on site and then assembled on site.
  • the truss is readily assembled with a power screwdriver and easily repaired. Dangerous welding equipment is not required and workplace safety is greatly improved.
  • the cost of the assembled truss is substantially cheaper than the prior art welded trusses and similar in cost to the wooden trusses.
  • FIG. 7 illustrates the use of the invention in a scissor truss 58.
  • similar integers in Fig. 7 to those referenced in Figs. 3 to 6 are referenced with a "C" suffix.
  • bottom chord 12B in Figs. 3 to 6 is replaced by chords 60, 62 which criss cross each other at 64.
  • chords 60, 62 which criss cross each other at 64.
  • chords 60, 62 face the same direction with chord 60 having its right angled sides being cut out at 64 to allow the flat bases of chords 60, 62 to be affixed to each other by screws 50C.
  • ends 68, 66 of chords 62, 60 respectively have their right angled sides cut to allow affixing to top chords 16C, 14C.
  • struts 24C will have their flat bases abutting the flat bases of chords 14C, 16C, 60, 62 to allow them to be fastened together by screws 50C.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Joining Of Building Structures In Genera (AREA)

Abstract

L'invention se rapporte à des fermes de charpente (10B, 58) comprenant des membrures supérieures et inférieures (14B, 16B, 12B, 14C, 16C, 60, 62) reliées par des contrefiches (24B, 24C). Ces membrures et ces contrefiches sont composées de profilés métalliques fixés les uns aux autres par des éléments de fixation filetés (50, 50C).
PCT/AU1995/000506 1994-08-16 1995-08-16 Fermes de charpente Ceased WO1996005384A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU31586/95A AU3158695A (en) 1994-08-16 1995-08-16 Building truss

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPM7491 1994-08-16
AUPM7491A AUPM749194A0 (en) 1994-08-16 1994-08-16 Building truss

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US08/607,631 Continuation US5972602A (en) 1993-08-27 1996-02-27 Quantitative PCR-based method of gene detection

Publications (1)

Publication Number Publication Date
WO1996005384A1 true WO1996005384A1 (fr) 1996-02-22

Family

ID=3782013

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1995/000506 Ceased WO1996005384A1 (fr) 1994-08-16 1995-08-16 Fermes de charpente

Country Status (2)

Country Link
AU (1) AUPM749194A0 (fr)
WO (1) WO1996005384A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001083906A1 (fr) * 2000-04-27 2001-11-08 Millers Global Enterprises Pty Ltd Ensemble ferme de toit amelioree
WO2002008538A1 (fr) * 2000-07-19 2002-01-31 Embury Edward E Charpente metallique pour toit

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU1078752A (en) * 1952-06-20 1953-05-21 Standard Steel Company Proprietary Limited Improved truss segment for building constructions and method of forming such segment
AU1745470A (en) * 1970-07-10 1972-01-13 Trus Joist Corporation Pitched truss and ridge connector therefor
AU1039976A (en) * 1975-01-20 1977-07-28 Sewell Roofing constructions and assembly
US4435940A (en) * 1982-05-10 1984-03-13 Angeles Metal Trim Co. Metal building truss
US4982545A (en) * 1989-07-10 1991-01-08 Stromback Gustav M Economical steel roof truss
WO1992022716A1 (fr) * 1991-06-19 1992-12-23 Garry Randall Hart Construction de batiment modulaire
EP0637656A2 (fr) * 1993-07-15 1995-02-08 MiTek Holdings, Inc. Pontre en treillis

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU1078752A (en) * 1952-06-20 1953-05-21 Standard Steel Company Proprietary Limited Improved truss segment for building constructions and method of forming such segment
AU2235453A (en) * 1953-10-22 1954-08-12 Lewis Ronald Harding Foldable building member
AU1745470A (en) * 1970-07-10 1972-01-13 Trus Joist Corporation Pitched truss and ridge connector therefor
AU1039976A (en) * 1975-01-20 1977-07-28 Sewell Roofing constructions and assembly
US4435940A (en) * 1982-05-10 1984-03-13 Angeles Metal Trim Co. Metal building truss
US4982545A (en) * 1989-07-10 1991-01-08 Stromback Gustav M Economical steel roof truss
WO1992022716A1 (fr) * 1991-06-19 1992-12-23 Garry Randall Hart Construction de batiment modulaire
EP0637656A2 (fr) * 1993-07-15 1995-02-08 MiTek Holdings, Inc. Pontre en treillis

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001083906A1 (fr) * 2000-04-27 2001-11-08 Millers Global Enterprises Pty Ltd Ensemble ferme de toit amelioree
WO2002008538A1 (fr) * 2000-07-19 2002-01-31 Embury Edward E Charpente metallique pour toit

Also Published As

Publication number Publication date
AUPM749194A0 (en) 1994-09-08

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