AU689190B2 - Structural truss - Google Patents
Structural truss Download PDFInfo
- Publication number
- AU689190B2 AU689190B2 AU13651/95A AU1365195A AU689190B2 AU 689190 B2 AU689190 B2 AU 689190B2 AU 13651/95 A AU13651/95 A AU 13651/95A AU 1365195 A AU1365195 A AU 1365195A AU 689190 B2 AU689190 B2 AU 689190B2
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- AU
- Australia
- Prior art keywords
- truss
- webs
- bottom chords
- structural
- cut
- 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.)
- Expired
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Description
SI
0
AUSTRALIA
Patents Act 1990 COMPLETE SPECIFICATION STANDARD PATENT Applicant(s): MITEK HOLDINGS, INC.
Invention Title: STRUCTURAL TRUSS
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0 The following statement is a full description of this invention, including the best method of performing it known to me/us: I- II 2 STRUCTURAL TRUSS This invention relates to a structural truss.
Structural trusses are known which comprise a top chord and a bottom chord which are joined together by connectors such as struts, brackets, plates or the like. Such trusses are normally manufactured in a factory to a certain length.
In some instances, it is required that the trusses be cut in order to fit in place in a building and conventional structural trusses do not offer great flexibility with respect to alteration of their lengths. This is because if conventional structural trusses are cut adjacent their ends, there is no structural integrity at the end of the truss after cutting and the ends of the chords will be free.
The object of this invention is to provide a structural 20 truss which overcomes this problem.
g 9" The invention provides a structural truss including: a top chord; a bottom chord; a middle portion; connecting means for interconnecting the top and bottom chords in the middle portion of the truss, said connecting means comprising a plurality of webs, the webs being secured between the top and bottom chords and 30 arranged such that webs on a front side of the truss are staggered with respect to the webs on a rear side of the truss so that opposed webs on the front and rear sides of the truss overlap one another with no gap between a web on the front side and an adjacent web on the rear side of the truss, so that the structural truss cannot be cut through the top and bottom chords and the webs and still provide staf/aenota eepspecVGANG.strucural.russ 13.10 1 L- p" 3 structural integrity; and end connecting means located adjacent at least one end of the structural truss which interconnects the ends of the top and bottom chords and also allows the structural truss to be cut through the top and bottom chords and the end connecting means and which after cutting provides structural integrity at the end of the truss, the end connecting means comprising a plurality of connector strips, the connector strips being secured between the top and bottom chords and being spaced apart from one another so that the end of the truss can be cut by cutting the top and bottom chords between the strips.
In view of incorporation of the end connecting means which enables the structural truss to be cut, the truss can easily be cut to length on site and installed in a building whilst maintaining the structural integrity of the truss.
Preferably the end connecting means comprises a connector 20 panel extending from the top chord to the bottom chord.
o* Preferably the panel is formed from metal and has integral punched teeth adjacent top and bottom edges for penetrating into the top and bottom chords respectively in order to
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secure the panel to the top and bottom chords.
In this embodiment of the invention, the truss is cut by cutting through the top and bottom chords and the panel itself with a suitable saw.
The panel may include tabs which provide a gauge to space the top and bottom chords apart by a predetermined distance by locating the top and bottom members adjacent the tabs on the panel.
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3A The panel may also include flutes or depressions to provide additional strength to the panel.
The panel may be square, rectangular or triangular in shape.
The connection means may comprise V-shaped webs or connector panels which are identical to the connector panels which form the end connection means, or any other desired components for structurally interconnecting the top and bottom chords.
9* 9 9 a 9999.9 9 ftC\ ,V~4 -'1 statfiaen/keep/pecV'GANGsrudratruss 13.10 I I I ~C L 4 In another embodiment of the invention, the end connecting means may comprise a plurality of connector strips, the connector strips being secured between the top and bottom chords and being spaced apart from one another so that the end of the truss can be cut by cutting the top and bottom chords between the strips.
Preferably connector strips are provided on front and rear sides of the top and bottom cords.
Preferably the strips on the front side of the truss are staggered with respect to the strips on the rear side of the truss so that opposed strips on the front and rear sides of the truss overlap one another but leave a gap between a strip on the front side of the truss and an adjacent strip on the rear side of the truss so that the truss can be cut by cutting the top and bottom members in the vicinity of the gap.
Preferably the connector strips are formed from metal and have integral punched teeth for penetrating the top and bottom chords to secure the strips to the top and bottom trusses.
In another preferred embodiment the end connecting means comprises a plurality of members made from wood, the members extending between the top and bottom chords and being spaced apart from one another to provide a gap between the members, the members being secured to the top and bottom chords by connector plates.
Preferably the connector plates are connector plates with integral teeth punched from the connector plates.
In one aspect of the above mentioned embodiment the members may include a pair of struts arranged in abutting stafaon/koep/speclJGANG.structurlI.trUss 7.3 5 relationship to one another, each pair being connected to the top and bottom chords by a pair of connector plates.
In a second aspect of the invention there is provided a structural truss including: a top chord; a bottom chord; a middle portion; connecting means for interconnecting the top and bottom chords in the middle portion of the truss, said connecting means comprising a plurality of webs, the webs being secured between the top and bottom chords and arranged such that webs on a front side of the truss are staggered with respect to the webs on a rear side of the truss so that opposed webs on the front and rear sides of the truss overlap one another with no gap between a web on the front side and an adjacent web on the rear side of the truss, so that the structural truss cannot be cut through the top and bottom chords and the webs and still provide structural integrity; and end connecting means located adjacent at least one end of the structural truss which interconnects the ends of the top and bottom chords, the end connecting means comprising a plurality of separate connector members, the connector members allowing the structural truss to be cut through the top and bottom chords, so that after cutting, one of the connector members provides structural integrity at the end of the truss.
30 Preferably the connector members are spaced apart from one e* e another to provide a gap between the connector members so that the structural truss can be cut through the top and bottom chords and in the gap between the connector members.
However, in an alternative embodiment the separate connector members could merely abut one another so that the i t staHt/ae ep/specVGANG.slructural.truss 13.10 -r I Ib~ _I 5A top and bottom chords can still be cut and so the connector member or connector members between the portions of the top and bottom chords which are cut from the structural truss are removed with the cut portions of the top and bottom chords.
The connector members may comprise a plurality of connector strips formed from metal and having integral punched teeth or members made from wood which are connected to the top and bottom chords by connector plates.
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i Lr i n% 'pa staftaen/keepspecVGANG.slrUctral.russ 13.10 c -P I 6 The invention also provides a method of installing in a building structure at a building site a prefabricated structural truss having top and bottom chords to be supported at its ends where the length of the truss is greater than the distance between end supports for the truss while maintaining the structural integrity of the truss ends, including providing connecting means for interconnecting the top and bottom chords in the middle portion of the truss, said connecting means comprising a plurality of webs, the webs being secured between the top S" and bottom chords and arranged such that webs on a front side of the truss are staggered with respect to the webs on a rear side of the truss so that opposed webs on the front and rear sides of the truss overlap one another with no gap 15 between a web on the front side and an adjacent web on the rear side of the truss, so that the structural truss cannot be cut through the top and bottom chords and the webs and still provide structural integrity, and providing means connecting the top and bottom chords at the truss ends, the connecting means comprising a plurality of connector strips being secured between the top and bottom chords and being spaced apart from one another, and cutting the top and bottom chords between the strips wherein after cutting the truss end retains structural integrity.
Preferred embodiments of the invention will be described, by way of example, with reference to the accompanying drawings in which: Figure 1 is front view of a structural truss embodying the invention; Figure 2 is view along the line II-II of Figure 1; Figure 3 is a view of a connector panel used in the embodiment of Figures 1 and 2; Figure 4 is a view of a second embodiment of the invention; S(,\\XELB01\home$\Karen\Keep\13651-95-MITEK.doc 19/01/98 J O~t- I I r r 6A o r
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Figure 5 is a view along the line V-V of Figure 4; Figure 6 is a front view of a further embodiment of the invention; Figure 7 is a front view of yet a further embodiment of the invention; and Figure 8 is a view along the line VIII-VIII of Figure 7.
With reference to Figure 1, a structural truss 10 is shown.
The truss 10 comprises a top chord 12 and a bottom chord *o *eI o *e oj *Yk i! 7 *C: I I 7 14. The top and bottom chords 12 and 14 are preferably formed from timber and may be of a size 50 by 75 mm and of any desired length.
The top and bottom chords 12 and 14 are connected together by a plurality of connectors such as generally inverted Vshaped connector members 16 which are arranged on the front face 15 of the structural truss 10 and similar connectors 18 arranged on the rear face 17 of the structural truss.
The connectors 16 and 18 are preferably formed from metal and are provided with punched teeth whicL are integral with the connectors 16 and 18 and which leave slots 20 in the connectors 16 and 18. The teeth which are punched from the slots penetrate the top and bottom members 12 and 14 to o. secure the connectors 16 and 18 to the top and bottom 15 chords and therefore the top and bottom chords together.
a.
*As shown in Figure 1, the connectors 16 and 18 are respectively staggered with respect to one another.
However, in other embodiments they could be aligned on the front and rear faces 15 and 17 if desired.
Although the preferred embodiment shows inverted V-shaped connectors, other types of connectors could be used to interconnect the trusses 16 and 18.
The ends of the structural truss 10 are provided with connector panels 30 which are shown in more detail in Figure 3. Although the embodiments shown in Figures 1 and 2 indicates that connector plates 30 are on the front face and rear face 17 of the structural truss 10, only one plate 30 may be provided at each end on either the front face 15 or rear face 17 of the structural truss.
The panels 30 are preferably formed from metal and also stafilaonlkeep/spoecGANG.siruclurl.truss 73 I 8 have integral punched teeth 33 which leave slots 32 in the panels. The teeth penetrate the chords 12 and 14 to secure the panels 30 to the chords and also to secure the chords together in a similar fashion to the connectors 16 and 18.
As is best shown in Figures 2 and 3, the panels 30 may also include flutes or depressions 34 of any desired shape or pattern for adding structural integrity to the panels The flutes or depressions can be formed by pressing or any suitable operation.
The panels 30 may also be provided with tabs 36 which are punched from the panels 30 to leave slots 38. The tabs 36 project inwardly in the same direction as the teeth 33 and provide a gauge for spacing the chords 12 and 14 apart by a predetermined distance. As is clearly shown in Figure 2, 15 the top and bottom chords 12 and 14 abut the tabs 36 and therefore locate the top and bottom chords 12 and 14 apart by a predetermined distance.
As is shown in Figure 3, the teeth 33 can be of any desired configuration and each slot 32 could have a pair of teeth projecting from the ends of each respective slot as referenced by the numerals 33a in Figure 3, or a single tooth 33b designed for on site application associated with each slot.
Figure 3 shows the two different types of teeth referred to but generally each connector panel would be provided with the same type of teeth and not two different types of teeth.
In order to alter the length of the structural truss shown in Figure 1, it is only necessary to cut through the end of the truss in the vicinity of the plate 30, for example, along dotted line C 1 shown in Figure 1 by means of staftoenkeoefspeciGANGstruura lIruss 73 b O 9 a suitable saw which not only cuts the top and bottom chords 12 and 14, but also the panel The connector panel 30 therefore provides structural integrity at the end of the truss 10 even though the truss 10 is cut in the vicinity of the panel.
Figures 4 and 5 show a second embodiment of the invention in which the ends of the truss 30 are provided with a plurality of strip connectors 50 on the front face 15 and rear face 17 of the truss. The strip connectors are provided with punched teeth in a similar fashion to the panels 30 and also may be provided with tabs similar to the tabs 36.
"As is best shown in Figure 5, the strip connectors 50 are staggered with respect to one another so that opposed connectors 50 on the front face 15 and the rear face 17 overlap one another whilst at the same time maintaining a gap G between a connector 50 on the front face 15 and the next adjacent connector 50 on the rear face 17.
In order to cut the truss, it is only necessary to make a cut along one of the dotted lines C 2 in Figure 5 in the vicinity of the gaps G between adjacent connectors 50 to thereby alter the length of the truss In other embodiments, the connector strips on the front face 15 and on the rear face 17 may directly oppose one another without any stagger whilst providing a gap between one connector strip on the front face 15 and an adjacent connector on the rear face 17.
In still further embodiments, the connector strips on the front face 15 and rear face 17 could be staggered completely with respect to one another so that they do not stalfaonlkoeplspecdGANG struural truss 7.3
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10 overlap at all and provide a gap between one connector strip on the front face 15 and the adjacent connector strip on the rear face 17 of the truss.
With reference to Figures 6 to 8, Figure 6 shows a further embodiment of the invention. In this embodiment the top and bottom chords 12 and 14 are joined by a plurality of connectors 18 (only one of which is shown) similar to those previously described. The end of the structural truss is provided with a plurality of wooden members 80 and 82.
The members 80 are formed from a pair of wooden struts which are abutted together in side by side relationship and •which are located between the top and bottom chords 12 and 14. The member 82 comprises a single wooden strut. The members 80 and 82 are connected to the top and bottom 15 struts 12 and 14 by connector plates 83 of conventional design. The connector plates 83 are provided with integral punched teeth and the teeth penetrate the members 80 and 82 as well as the top and bottom chords 12 and 14 to secure the members 80 and 82 between the top and bottom chords 12 and 14.
As is clearly shown in Figure 6, the members 80 and 82 are spaced from one another to provide gaps G. In order to cut the structural truss 10 to size, the truss can be cut in the vicinity of one of the gaps G along, for example, the line C 3 This will have the effect of removing, in the example of Figure 6, the outermost member 80 and the adjacent portions of the top and bottom chords 12 and 14.
The middle member marked 80' will therefore provide structural integrity at the end of the structural truss after cutting.
Figure 7 shows an embodiment similar to Figure 6 in which the connector members 82 are single wooden struts connected to the top chord 12 and bottom chord 14 by connector plates staff/aentkeop~spocGANGstructuraltruss 7.3
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11 83 which have integral punched teeth. Once again, in order to cut the structural truss 10, the truss 10 is cut in the vicinity of one of the gaps G, for example, along line C 4 to remove the endmost connector member 82 and the adjacent part of the chord 12 and chord 14 thereby leaving the connector member marked 82' in Figure 7 to provide structural integrity at the end of the cut truss.
In an alternative embodiment, the connector members 80 and 82 could abut one another rather than be spaced and when the top and bottom chords 12 and 14 are cut, the connector members 80 or 82 which are secured to the cut portions of the top and bottom chords are simply removed with the cut portions of the top and bottom chords thereby relieving the remaining connector members 80 or 82 to provide structural integrity at the end of the structural truss. In this arrangement rather than simply cutting for example, through the top chord, then passing the saw through the gap G and then cutting through the bottom chord 14, the top chord 12 is cut and then the truss can be turned over and the bottom chord 14 cut or the bottom chord 14 could be cut from the bottom. Alternatively, the top chord 12 could be cut and the saw forced between the separate but abutting connector members 80 or 82 and then the bottom chord 14 could be cut.
Since modifications within the spirit and scope of the invention may readily be effected by persons skilled within the art, it is to be understood that this invention is not limited to the particular embodiment described by way of example hereinabove.
sta~faen/koespeiGANG.sructura.truss 13
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Claims (8)
1. A structural truss including: a top chord; a bottom chord; a middle portion; connecting means for interconnecting the top and bottom chords in the middle portion of the truss, said connecting means comprising a plurality of webs, the webs being secured between the top and bottom chords and arranged such that webs on a front side of the truss are staggered with respect to the webs on a rear side of the truss so that opposed webs on the front and rear sides of the truss overlap one another with no gap between a web on the front side and an adjacent web on the rear side of the truss, so that the structural truss cannot be cut through the top and bottom chords and the webs and still provide structural integrity; and end connecting means located adjacent at least 20 one end of the structural truss which interconnects the o: ends of the top and bottom chords and also allows the structural truss to be cut through the top and bottom chords and the end connecting means and which after cutting provides structural integrity at the end of the truss, the end connecting means comprising a plurality of connector strips, the connector strips being secured between the top and bottom chords and being spaced apart from one another so that the end of the truss can be cut by cutting the top and bottom chords between the strips.
2. The truss of claim 1 wherein the connector strips are provided on the front and rear sides of the top and bottom trusses.
3. The truss of claim 2 wherein the strips on the front side of the truss are staggered with respect to the j stafl/aenAeep/speciGANG.strucural.ltruss 13.10 I 13 strips on the rear side of the truss so that opposed strips on the front and rear sides of the truss overlap one another but leave a gap between a strip on the front side of the truss and an adjacent strip on the rear side of the truss so that the truss can be cut by cutting the top and bottom members in the vicinity of the gap.
4. The truss of claim 1, 2 or 3 wherein the connector strips are formed from metal and have integral punched teeth for penetrating the top and bottom chords to secure the strips to the top and bottom trusses.
A structural truss including: a top chord; a bottom chord; a middle portion; connecting means for interconnecting the top and bottom chords in the middle portion of the truss, said connecting means comprising a plurality of webs, the webs being secured between the top and bottom chords and arranged such that webs on a front side of the truss are S: staggered with respect to the webs on a rear side of the truss so that opposed webs on the front and rear sides of the truss overlap one another with no gap between a web on the front side and an adjacent web on the rear side of the truss, so that the structural truss cannot be cut through the top and bottom chords and the webs and still provide structural integrity; and end connecting means located adjacent at least 30 one end of the structural truss which interconnects the S ends of the top and bottom chords, the end connecting means comprising a plurality of separate connector members, the connector members allowing the structural truss to be cut through the top and bottom chords, so that after cutting, one of the connector members provides structural integrity at the end of the truss. .J stalaellkeepf(pecGANG.sructural.ltrss 13.10 Oj 14
6. The truss of claim 5 wherein the connector members are spaced apart from one another to provide a gap between the connector members so that the structural truss can be cut through the top and bottom chords and in the gap between the connector members.
7. The truss of claim 5 wherein some of the separate connector members are formed from a pair of struts which abut one another, the top and bottom chords can be cut in gaps between the separate connector members and so the portions of the top and bottom chords which are cut from the structural truss are removed with the connector member 0 or connector members between the cut portions of the top and bottom chords. *0
8. A method of installing in a building structure at a building site a prefabricated structural truss having top and bottom chords to be supported at its ends where the •length of the truss is greater than the distance between end supports for the truss while maintaining the structural integrity of the truss ends, including providing connecting means for interconnecting the top and bottom chords in the middle portion of the truss, said connecting means comprising a plurality of webs, the webs being secured between the top and bottom chords and arranged such that webs on a front side of the truss are staggered with respect to the webs on a rear side of the truss so that opposed webs on the front and rear sides of the truss overlap one another with no gap between a web on the front side and an adjacent web on the rear side of the truss, so that the structural truss cannot be cut through the top and bottom chords and the webs and still provide structural integrity, and providing means connecting the top and bottom chords at the truss ends, the connecting means comprising a plurality of connector strips being secured between the top and bottom chords and being spaced apart \\HELB01\homeS\Karen\Keep\13651-95-MITEK.doc 19/01/98 (Nr\ L- LI- II I: 15 ooooo *t f ee **9 o o o from one another, and cutting the top and bottom chords between the strips wherein after cutting the truss end retains structural integrity. Dated this 19th day of January 1998 MITEK HOLDINGS INC. By Its Patent Attorneys: GRIFFITH HACK Fellows Institute of Patent Attorneys of Australia. \\HELB01\homeS\Karen\Keep\13651-95-MITEKdoc 19/01/98 \i ,il ?j o F,- 1 I CI ABSTRACT A structural truss is described which has a top chord (12) and a bottom chord (14) joined by connector End connectors (50) in the form of strip connectors which are spaced apart from one another are provided at each end so the structural truss can be cut between connectors (50) to alter the length of the truss while maintaining structural integrity at the end of the truss. *0 00 0 0 0 a S A staftaenlkeep/speciIGANG.st .tcural.truss 7.3 i -r
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU13651/95A AU689190B2 (en) | 1994-03-09 | 1995-03-07 | Structural truss |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPM4300 | 1994-03-09 | ||
| AUPM4300A AUPM430094A0 (en) | 1994-03-09 | 1994-03-09 | Structural truss |
| AUPM4793 | 1994-03-31 | ||
| AUPM4793A AUPM479394A0 (en) | 1994-03-31 | 1994-03-31 | Structural truss |
| AU13651/95A AU689190B2 (en) | 1994-03-09 | 1995-03-07 | Structural truss |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU1365195A AU1365195A (en) | 1995-09-21 |
| AU689190B2 true AU689190B2 (en) | 1998-03-26 |
Family
ID=27152054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU13651/95A Expired AU689190B2 (en) | 1994-03-09 | 1995-03-07 | Structural truss |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU689190B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5996303A (en) * | 1999-02-18 | 1999-12-07 | Mitek Holdings, Inc. | Truss with alternating metal web |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ZA988902B (en) | 1997-11-14 | 1999-08-16 | Mitek Holdings Inc | Lintel. |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU5956765A (en) * | 1964-06-05 | 1966-12-01 | Benjamin Hern Geoffrey | Improvements relating to elongated structural units and building structures fabricated therefrom |
| GB1367893A (en) * | 1971-12-16 | 1974-09-25 | Holme Sons Ltd Walter | Structural beams |
| CA1122377A (en) * | 1980-05-06 | 1982-04-27 | Geza Lantos | Joist member |
-
1995
- 1995-03-07 AU AU13651/95A patent/AU689190B2/en not_active Expired
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU5956765A (en) * | 1964-06-05 | 1966-12-01 | Benjamin Hern Geoffrey | Improvements relating to elongated structural units and building structures fabricated therefrom |
| GB1367893A (en) * | 1971-12-16 | 1974-09-25 | Holme Sons Ltd Walter | Structural beams |
| CA1122377A (en) * | 1980-05-06 | 1982-04-27 | Geza Lantos | Joist member |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5996303A (en) * | 1999-02-18 | 1999-12-07 | Mitek Holdings, Inc. | Truss with alternating metal web |
Also Published As
| Publication number | Publication date |
|---|---|
| AU1365195A (en) | 1995-09-21 |
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