AU779882B2 - High strength concealed roof fix - Google Patents
High strength concealed roof fix Download PDFInfo
- Publication number
- AU779882B2 AU779882B2 AU97099/01A AU9709901A AU779882B2 AU 779882 B2 AU779882 B2 AU 779882B2 AU 97099/01 A AU97099/01 A AU 97099/01A AU 9709901 A AU9709901 A AU 9709901A AU 779882 B2 AU779882 B2 AU 779882B2
- Authority
- AU
- Australia
- Prior art keywords
- sheet
- trailing
- clip
- leading
- support portion
- 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
Links
Landscapes
- Roof Covering Using Slabs Or Stiff Sheets (AREA)
Description
Regulation 3.2
AUSTRALIA
PATENTS ACT 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT
ORIGINAL
Name of Applicant: Exosteel Holdings Pty Ltd Actual Inventor/s: Ron Jantzen Address for Service: MADDERNS, 1st Floor, 64 Hindmarsh Square, Adelaide, South Australia, Australia Invention title: HIGH STRENGTH CONCEALED ROOF FIX Details of Associated Provisional Application No: PR 1960 dated 8 t December 2000 The following statement is a full description of this invention, including the best method of performing it known to us.
(PatAU131 I This invention relates to roof sheeting, the joining of roof sheets side-to-side and in particular to means for providing a high strength fixing of roof sheeting from below (concealed fixing).
BACKGROUND
The following discussion providing some background to the invention is intended to facilitate a better understanding of the invention. However, it should be appreciated that the discussion is not an acknowledgement or admission that any of the material referred to was published, known or part of the common general knowledge in Australian as at the priority date of the application.
Sheet metal roofing traditionally comprised a plurality of corrugated sheet metal elements laid side to side with overlapping edges. The roof sheets were generally fastened to transversely extending spaced apart purlins or other support 15 members by nails, screws or other fasteners piercing the roof sheets and engaging the purlins.
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In more recent times, "flat" or "ribbed" roof sheets (or cladding elements) have been developed. These sheets generally comprise an essentially flat "pan" 20 having upwardly extending side portions. Generally the pans include one or more longitudinally extending upstanding stiffening ribs separating the pan into a number of pan portions.
roof structures these roof cladding sheets are laid side-to-side with the "25 upstanding side portions overlapping those of adjacent sheets. Each sheet is generally provided with one upstanding side portion in the form of a male rib formation and an opposite upstanding side portion in the form of a female rib formation. In assembly, the male rib formation is adapted to fit snuggly within the female rib formation in interlocking engagement to resist separation of the sheets.
Concealed clips, often affixed to straps, are attached to puriins to provide an attachment means for holding the roofing sheets. These concealed clips have the advantage over traditional fasteners that they do not require penetration of the roofing sheets.
A problem with fixing roof sheeting from underneath without any penetration through the roof sheeting, is that in areas exposed to high uplift forces, the clips or fixings can fail leading to separation at their lap joints and lifting of roof sheets.
It is an object of the present invention to provide an assembly having a lap joint which is less susceptible to separation.
15 o oo 20 SUMMARY OF THE INVENTION According to a first aspect of the invention there is provided a roof cladding and concealed clip assembly including: an elongate roof cladding sheet including: at least one flat pan portion; an upstanding leading side portion; and an upstanding trailing side portion having an upwards facing top surface and a re-entrant portion which forms an intermediate shoulder; and (ii) two adjacent clips laid in an end-to-end relationship, a first of which is located under the sheet and is disposed substantially transverse to the sheet, each clip including: an elongate base for fixing to a roof support, the base having a trailing end and a leading end; a leading support portion extending upwards from the leading end of the base; and a trailing support portion extending upwards from the trailing end of the base, characterised in that: the trailing support portion of at least the first of the two clips is shaped and positioned such that it extends over the intermediate shoulder of the trailing side portion of the sheet so as to restrain uplift of the trailing side portion of the sheet; and the leading support portion of a second of the two clips is shaped and positioned such that it extends over the upwards facing top surface of the sheet so as to restrain uplift of the trailing side portion of the sheet.
Preferably each trailing support portion returns downwards and has a tail terminating adjacent the plane in which the base lies, the tail attachable to the support to secure the trailing support portion against uplift.
Preferably the tail of the first clip extends under the leading support portion of the second clip.
15 2 oo eoooo 2 According to a second aspect of the invention there is provided a roof cladding and concealed clip assembly including: a first elongate roof cladding sheet including: at least two flat pan portions adjacent each other; a longitudinally extending upstanding rib separating two pan portions; an upstanding leading side portion having a first re-entrant portion which forms an elongate first shoulder and a second re-entrant portion which forms an elongate second shoulder, the first and second shoulders opening substantially towards each other; and an upstanding trailing side portion having an upwards facing top surface and a third re-entrant portion which forms an elongate third shoulder; and (ii) two adjacent clips laid in an end-to-end relationship, a first of which is located under the first sheet and is disposed substantially transverse to the first sheet, each clip including: an elongate base for fixing to a roof support, the base having a trailing end and a leading end; a leading support portion extending upwards from the leading end of the base and having a first projection adapted to engage the second shoulder; and a trailing support portion extending upwards from the trailing end of the base and having a second projection adapted to engage the third shoulder, characterised in that: the leading support portion of a second of the two clips is shaped and positioned such that it extends over the upwards facing top surface of the first sheet so as to restrain uplift of the trailing side portion of the first sheet.
Preferably each trailing support portion according to the second aspect of the invention returns downwards and has a tail terminating adjacent the plane in which the base lies, the tail attachable to the support.
Preferably the assembly according to the second aspect of the invention further includes a second sheet in accordance with the first sheet, the second sheet laid over the second clip with the leading side portion of the second sheet overlapping and engaging the trailing side portion of the first sheet so that the first re-entrant portion of the second sheet nestles into the third shoulder of the first sheet.
Preferably the trailing portion of the first clip and the leading portion of the second clip according to the second aspect of the invention abut to form an S upstanding member having the second projection of the first clip and the first projection of the second clip projecting outwards from opposite sides of the S•upstanding member.
•eeoo S 20 According to a third aspect of the invention there is provided a roof cladding and concealed clip assembly including: an elongate roof cladding sheet having an upstanding leading side portion and an upstanding trailing side portion; and (ii) a first clip located under the sheet and disposed substantially transverse to the sheet, the clip having: an elongate base fixable to a roof support; a trailing support portion extending upwards from a trailing end of the base; and a leading support portion extending upwards for a leading end of the base, wherein the leading support portion of the clip restrains the leading side portion of the sheet from uplift and the trailing support portion of the clip restrains the trailing side portion of the sheet from uplift.
Preferably each trailing support portion according to the third aspect of the invention returns downwards and has a tail terminating adjacent the plane in which the base lies, the tail attachable to the support to secure the trailing support portion against uplift.
Preferably the assembly according to the third aspect of the invention further includes: a second clip laid in an end-to-end relationship with the first clip, wherein the leading portion of the second clip is shaped and positioned such that it extends over the trailing side portion of the sheet.
A specific embodiment of the invention will now be described in some further detail with reference to and as illustrated in the accompanying figures. This embodiment is illustrative and is not meant to be restrictive of the scope of the invention.
BRIEF DESCRIPTION OF THE DRAWINGS 20 Fig 1 shows a roof cladding sheet in cross-section; Fig 2 shows a clip in cross-section; Fig 3 shows a cross-sectional view of an assembly of the roof cladding sheet of Fig 1 and the clip of Fig 2; i Fig 4 shows a detailed view of a leading end of the assembly shown in Fig. 3; Fig 5 shows a detailed view of a trailing end of the assembly shown in Fig 3; Fig 6 is a reproduction of Fig 4 with a leading support portion of a second clip of the type shown in Fig 2 shown in its assembled overlaid position; Fig 7 shows a detailed view of a completed lap joint between two roof cladding sheets as shown in Fig 1 and two straps as shown in Fig 2; Fig 8 shows the clip of Fig 2 in perspective view; Fig 9 shows an "expioded" perspective view of the roof cladding sheet of Fig 1 and the clip of Fig 2; Fig 10 shows two clips as shown in Fig 2 laid in an end to end relationship with a first roof cladding sheet installed; and Fig 11 is the same as Fig 10 but with a second roof cladding sheet installed.
DETAILED DESCRIPTION OF AN EMBODIMENT OF THE INVENTION Fig 1 shows a roof cladding sheet 10 having a longitudinally extending upstanding rib 30 separating two pan portions 11. Sheet 10 also has an upstanding leading side portion 20 and an upstanding trailing side portion 40. The upstanding leading side portion 20 has a first re-entrant portion which forms an elongate first shoulder 21. The upstanding leading side portion 20 also has a second re-entrant portion which forms an elongate second shoulder 22. These two shoulders face towards each other. The upstanding trailing side portion 40 also has a re-entrant portion. This third re-entrant portion forms an elongate third shoulder 43. The first and second shoulders 21 and 22 and the third shoulder 23 provide surfaces that can be engaged by a clip 100.
•Sheets 10 are available in a variety of longitudinal lengths and are laid in an overlapping edge to edge relationship on purlins or other roof supports to provide a finished roof. The direction of laying is indicated by arrow 300 in Fig 9.
Figs 2 and 8 show a clip 100 which is attachable to purlins or other roof support structure to provide support for and to retain roof sheets (such as the roof sheet 10 shown in Fig The roof sheet 10 of Fig 1 is attached to and retained by clip 100 shown in Fig 2. The assembly is shown in Fig 3 and in an "exploded" perspective view in Fig 9.
Strap 100 comprises an elongate base 111 having a leading end support portion 120 at one end and a trailing end support portion 140 at its other end. In its centre is a centre rib support 130. The base portion 111 and tail portion 143 can be provided with apertures for allowing insertion of screws or other fixing means to allow the clip 100 to be firmly attached to puriins or the like. The leading, trailing and base portions 120, 140 and 111 may be pressed from sheet metal of approximately 1mm thickness.
The leading support portion 120 of clip 100 has a first projection 121 which is adapted to engage the second shoulder 22 of the sheet 10. The trailing support portion 140 of the clip 100 has a second projection 142 adapted to engage the third shoulder 43 of the sheet Fig 4 shows a detailed view of the interface between the leading end of a clip 100 having a leading support portion 120 and a roof sheet 10 having a leading side portion 20. The leading side portion 20 (otherwise known as a female rib) snaps over the leading side portion 120 of clip 100 to joint the two components together.
Projection 121 extends over the shoulder 22 of the sheet 10 to restrain the leading side portion 20 from uplift.
Fig 5 shows a detailed view of the other end of sheet 10 and clip 100 and the •"interface between these components. The trailing edge support portion 140 of clip 100 has a second projection 142 shaped and positioned such that it extends over the third shoulder 43 within the trailing support portion 40 of sheet 10 to restrain uplift.
Figs 6 and 10 show the assembly of Fig 5 with a second clip 100' in position in an end-to-end relationship with the first clip 100. The leading support portion 120' of clip 100' extends over the upwards facing top surface 46 (shown in Figs 1 and 5) of sheet 10 to restrain the trailing side portion 40 of sheet 10 from uplift. Thus it can be seen that the trailing end 40 of sheet 10 is restrained from uplift by both the trailing support portion 140 of clip 20 and the leading support portion 120' of second clip 100'. This provides a very secure fixing and represents an improvement over prior art fixing arrangements. In arrangements where there is no trailing support portion 140 of the type shown in Fig 6 it is possible that the leading support portion 120' may give way under high uplift loads to release the trailing side portion 40 of sheet A detailed view of a completed lap joint showing the leading side portion of a second sheet 10' is shown in Figs 7 and 11. Also shown in Fig 7 is an indentation 48 within the trailing side portion 40. This indentation 48 provides a gap for the leading support portion 120' between the trailing side portion 40 of sheet 10 and the leading side portion 20' of sheet Holes through the straps are provided for insertion of fasteners for secure attachment to purlins. A centreline 154 is indicated in Fig 7. Optionally a hole can be provided on the other side of the trailing support portion 24 as indicated by centerline 153. This hole would be utilised in areas of particularly high wind loading.
In order to construct a roof using roof cladding sheets 10 and concealed clips 100, first a row of clips 100 are attached to roof purlins using fasteners such as tech screws as shown in Fig 9 (purlins not shown). In Fig 9, a single clip 100 is shown.
15 However a plurality of clips will be used in practice. Once the first row of clips 100 have been installed, a first roof sheet 10 can be installed by clicking it onto the clips 100 as shown in Fig 9.
With the first roof sheet 10 securely installed as shown in Fig 10, a second row .20 of clips 100' can be installed. The leading support portions 120' are overlaid over the top of the trailing side portion 40 of the first sheet 110 as shown in Fig 10. The trailing S"side portion 40 of the first sheet 10 is now held both by projection 142 extending from the trailing support portion 140 and by the "over-strapping" of the leading support portion 120' of the second clip 100'.
Once the second row of clips 100' are in place, a second roof sheet 10' can be installed as shown in Fig 11. This process can be repeated to extend the roof sheets across the purlins so as to complete a roof construction.
The embodiment described above includes two flat pan portions 111. Other embodiments of the invention may have only a single pan portion between upstanding leading and trailing side portions. Alternatively three or more pan sections may be used.
While the present invention has been described in terms of a preferred embodiment in order to facilitate better understanding of the invention, it should be appreciated that various modifications can be made without departing from the principles of the invention. Therefore, the invention should be understood to include all such modifications within its scope.
o *ooo* ooo
Claims (13)
1. A roof cladding and concealed clip assembly including: an elongate roof cladding sheet including: at least one flat pan portion; an upstanding leading side portion; and an upstanding trailing side portion having an upwards facing top surface and a re-entrant portion which forms an intermediate shoulder; and (ii) two adjacent clips laid in an end-to-end relationship, a first of which is located under the sheet and is disposed substantially transverse to the sheet, each clip including: an elongate base for fixing to a roof support, the base having a trailing end and a leading end; a leading support portion extending upwards from the leading end of the base; and a trailing support portion extending upwards from the trailing end of the base, "••characterised in that: the trailing support portion of at least the first of the two clips is shaped and positioned such that it extends over the intermediate shoulder of the trailing side 20 portion of the sheet so as to restrain uplift of the trailing side portion of the sheet; and the leading support portion of a second of the two clips is shaped and positioned such that it extends over the upwards facing top surface of the sheet so •as to restrain uplift of the trailing side portion of the sheet.
2. A roof cladding and concealed clip assembly as claimed in claim I wherein each trailing support portion returns downwards and has a tail terminating adjacent the plane in which the base lies, the tail attachable to the support to secure the trailing support portion against uplift. e g. C 0**e 0O C. S C *h S S 0* C C.
3. A roof cladding and concealed clip assembly as claimed in claim 2 wherein the tail of the first clip extends under the leading support portion of the second clip.
4. A roof cladding and concealed clip assembly including: a first elongate roof cladding sheet including: at least two flat pan portions adjacent each other; a longitudinally extending upstanding rib separating two pan portions; an upstanding leading side portion having a first re-entrant portion which forms an elongate first shoulder and a second re-entrant portion which forms an elongate second shoulder, the first and second shoulders opening substantially towards each other; and an upstanding trailing side portion having an upwards facing top surface and a third re-entrant portion which forms an elongate third shoulder; and (ii) two adjacent clips laid in an end-to-end relationship, a first of which is located 15 under the first sheet and is disposed substantially transverse to the first sheet, each clip including: an elongate base for fixing to a roof support, the base having a trailing end and a leading end; a leading support portion extending upwards from the leading end of the base and having a first projection adapted to engage the second shoulder; and a trailing support portion extending upwards from the trailing end of the base and having a second projection adapted to engage the third shoulder, characterised in that: the leading support portion of a second of the two clips is shaped and positioned such that it extends over the upwards facing top surface of the first sheet so as to restrain uplift of the trailing side portion of the first sheet.
A roof cladding and concealed clip assembly as claimed in claim 4 wherein each trailing support portion returns downwards and has a tail terminating adjacent the plane in which the base lies, the tail attachable to the support.
6. A roof cladding and concealed clip assembly as claimed in claim 4 or 5 further including a second sheet in accordance with the first sheet, the second sheet laid over the second clip with the leading side portion of the second sheet overlapping and engaging the trailing side portion of the first sheet so that the first re-entrant portion of the second sheet nestles into the third shoulder of the first sheet.
7. A roof cladding and concealed clip assembly as claimed in claim 6 wherein the trailing portion of the first clip and the leading portion of the second clip abut to form an upstanding member having the second projection of the first clip and the first projection of the second clip projecting outwards from opposite sides of the upstanding member.
8. A roof cladding and concealed clip assembly including: S: an elongate roof cladding sheet having an upstanding leading side portion and an upstanding trailing side portion; and (ii) a first clip located under the sheet and disposed substantially transverse to the sheet, the clip having: an elongate base fixable to a roof support; a trailing support portion extending upwards from a trailing end of the base; and a leading support ooooo portion extending upwards for a leading end of the base, wherein the leading support portion of the clip restrains the leading side portion of the sheet from uplift and the trailing support portion of the clip restrains the trailing side portion of the sheet from uplift.
9. A roof cladding and concealed clip assembly as claimed in claim 8 wherein each trailing support portion returns downwards and has a tail terminating adjacent the plane in which the base lies, the tail attachable to the support to secure the trailing support portion against uplift.
A roof cladding and concealed clip assembly as claimed in claim 8 or 9 further including: a second clip laid in an end-to-end relationship with the first clip, wherein the leading portion of the second clip is shaped and positioned such that it extends over the trailing side portion of the sheet.
11. A roof cladding and concealed clip assembly as claimed in claim 10 wherein the trailing portion of the first clip and the leading portion of the second clip abut to form an upstanding member having a pair of projections projecting outwards from opposite sides of the upstanding member, the projections adapted to engage elongate shoulders within the sheets.
12. A roof cladding and concealed clip assembly substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
13. A concealed clip assembly substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings. 15 Dated this 7 t day of December 2001. EXOSTEEL HOLDINGS PTY LTD By its Patent Attorneys MADDERNS o o e
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU97099/01A AU779882B2 (en) | 2000-12-08 | 2001-12-07 | High strength concealed roof fix |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPR1960 | 2000-12-08 | ||
| AUPR1960A AUPR196000A0 (en) | 2000-12-08 | 2000-12-08 | High strength concealed roof fix |
| AU97099/01A AU779882B2 (en) | 2000-12-08 | 2001-12-07 | High strength concealed roof fix |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU9709901A AU9709901A (en) | 2002-06-13 |
| AU779882B2 true AU779882B2 (en) | 2005-02-17 |
Family
ID=25641795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU97099/01A Expired AU779882B2 (en) | 2000-12-08 | 2001-12-07 | High strength concealed roof fix |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU779882B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NZ564628A (en) * | 2005-06-21 | 2011-05-27 | Bluescope Steel Ltd | A cladding sheet with resistance to wind uplift |
| WO2008019441A1 (en) * | 2006-08-17 | 2008-02-21 | Panel D (Nz) Limited | Method of manufacturing trailers |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU6569960A (en) * | 1960-10-18 | 1963-05-02 | John Lysaght (Australia) Limited | Sheetmetal decking |
| GB2032987A (en) * | 1978-10-26 | 1980-05-14 | Lysaght Ltd John | Cladding sheets |
| AU6657500A (en) * | 1999-10-18 | 2001-04-26 | Fielders Steel Roofing Pty Ltd | Secret fix roof sheeting arrangement |
-
2001
- 2001-12-07 AU AU97099/01A patent/AU779882B2/en not_active Expired
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU6569960A (en) * | 1960-10-18 | 1963-05-02 | John Lysaght (Australia) Limited | Sheetmetal decking |
| GB2032987A (en) * | 1978-10-26 | 1980-05-14 | Lysaght Ltd John | Cladding sheets |
| AU6657500A (en) * | 1999-10-18 | 2001-04-26 | Fielders Steel Roofing Pty Ltd | Secret fix roof sheeting arrangement |
Also Published As
| Publication number | Publication date |
|---|---|
| AU9709901A (en) | 2002-06-13 |
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