AU2008323613A1 - Perimeter screening system - Google Patents

Perimeter screening system Download PDF

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Publication number
AU2008323613A1
AU2008323613A1 AU2008323613A AU2008323613A AU2008323613A1 AU 2008323613 A1 AU2008323613 A1 AU 2008323613A1 AU 2008323613 A AU2008323613 A AU 2008323613A AU 2008323613 A AU2008323613 A AU 2008323613A AU 2008323613 A1 AU2008323613 A1 AU 2008323613A1
Authority
AU
Australia
Prior art keywords
screen assembly
lifting
perimeter
support
floor
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.)
Abandoned
Application number
AU2008323613A
Inventor
Graham William Shaw
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.)
GROCON Pty Ltd
Original Assignee
GROCON 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
Priority to AU2007906226 priority Critical
Priority to AU2007906226A priority patent/AU2007906226A0/en
Application filed by GROCON Pty Ltd filed Critical GROCON Pty Ltd
Priority to AU2008323613A priority patent/AU2008323613A1/en
Priority to PCT/AU2008/001683 priority patent/WO2009062243A1/en
Publication of AU2008323613A1 publication Critical patent/AU2008323613A1/en
Abandoned legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/32Safety or protective measures for persons during the construction of buildings
    • E04G21/3204Safety or protective measures for persons during the construction of buildings against falling down
    • E04G21/3219Means supported by the building wall, e.g. security consoles
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/32Safety or protective measures for persons during the construction of buildings
    • E04G21/3204Safety or protective measures for persons during the construction of buildings against falling down
    • E04G21/3247Storey high safety barrier hung from the facade and sliding up from level to level as work progresses

Description

WO 2009/062243 PCT/AU2008/001683 1 Perimeter screening system Field of the invention The present invention relates generally to a perimeter screening system for use during 5 the construction of multi-level buildings, especially high-rise tower buildings. Background of the invention A major constraint on the construction of high-rise buildings is the strength of prevailing winds. Notwithstanding the installation of guardrails at the adjacent edge of a floor slab, there is a maximum wind speed above which the installation of cladding cannot be 10 safely continued. The typical limiting wind speed for tower cladding installation is recognised as being about 1Oin/s. To overcome this limitation and to additionally improve safety, perimeter screening systems are used to guard and protect the edges of the floors of buildings as the floors are being constructed. The perimeter screens usually extend over multiple floors, 15 typically three or four. When a new floor is being built, the perimeter screens are moved up or "jumped" to the next floor. Presently, to move perimeter screens between floors, each individual screen is lifted up to the next floor by a crane. A typical building may include around thirty to fifty perimeter screens. Pouring of a floor is carried out in zones so that perimeter screen lifting and 20 form jacking can be carried out in one zone, while another zone is being poured and a third is drying. For each zone, there may be eighteen perimeter screens. Each perimeter screen will have two beams temporarily held to the floor by a large bolt at the inner end. The outer end is connected to the perimeter screen. These beams are termed "needles" in the building industry and take the weight of the screen. Prior to 25 connecting the crane to the screens a second level of needles is located on the new floor level above. These needles are required to support the perimeter screens when WO 2009/062243 PCT/AU2008/001683 2 they are raised, therefore two levels of needles are required. Once the crane has taken the load of the perimeter screen, all of the needles on the lower level are unbolted and removed by workers and manually transported to the next floor, two levels above prior to raising the screen. When moving a zone of eighteen screens, for example, thirty-six 5 needles need to be manually removed, transported to the next floor and re-fixed. The current system is manually laborious and can take around ten hours to move an entire zone of perimeter screens. The screens are typically moved up a floor every seven days or so. Another limitation of the current system is that cranes can only operate in wind speeds up to a set maximum, eg 21m/s, which can be somewhat 10 limiting in areas of regularly higher wind speeds. One attempt to eliminate the use of a crane involves the temporary installation of a mast between the building floors to be jumped. The mast includes a plurality of holes, spaced every 40mm or so along the mast. The perimeter screen is jumped up the mast between the holes in multiple stages. Such a system is laborious and time consuming, 15 taking around four hours to jump one perimeter screen up to the next floor. It is not admitted that any of the information in this specification is common general knowledge, or that the person skilled in the art could be reasonably expected to have ascertained, understood, regarded it as relevant or combined it in anyway at the priority date. 20 It is therefore an object of the present invention to provide a perimeter screening system that at least in part alleviates one of more of the problems associated with current systems. Summary of the invention The invention provides a perimeter screening system for a multi-level building, that 25 includes a screen assembly including at least one perimeter screen, and lifting means connected to the assembly and fitted with a first support member detachably connectable to a floor of the building to provide a bearing point for lifting the screen WO 2009/062243 PCT/AU2008/001683 3 assembly to another floor. A pair of second support members is laterally spaced from the first support member and the second support members are detachably connectable to a floor for receiving the load of the screen assembly whilst the screen assembly is in a stationary position. At least one vertical guide column is connected to the screen 5 assembly and has a plurality of vertically spaced apart horizontal elements. Safety means is fitted to at least one of the second support members and interacts with the at least one vertical guide column so as to allow the screen assembly and guide column to be lifted past but to receive the load of the screen assembly by engaging under one of the horizontal elements in the event of failure of the lifting means during lifting of the 10 screen assembly. At least another of the second support members is retractable towards the screen assembly to travel with the screen assembly past a next floor during lifting of the screen assembly, and the first support member is retractable towards the lifting means to travel with the lifting means past a next floor as it is retracted upwardly. Preferably the first support member is spaced from and between the second support 15 members when viewed in plan. The screen assembly may include multiple perimeter screens connected in series side by side. In this case there are at least two of the first support member, at least two of the guide columns, and at least two pairs of the second support members, and the first support members are between the second support members of the respective pairs 20 when viewed in plan. Furthermore, the multiple perimeter screens may be connected in series side by side by at least one horizontal beam or truss assembly and the lifting means and guide column(s) may be affixed to the horizontal beam or truss assembly. Preferably the retractable first and second support members are pivotally retractable. The lifting means may be, for example, a hydraulic ram apparatus, or a screw jack. 25 Preferably the or each guide column slidably engages the respective second support members to prevent lateral movement of the screen assembly. This slidable engagement may include a roller mechanism at an end of the beam for preventing lateral movement of the screen assembly whilst stationary and whilst being raised from a first floor to a second floor.
WO 2009/062243 PCT/AU2008/001683 4 The perimeter screening system may further include support props and/or braces associated with the first and first support members, that are retractable to travel with the screen assembly or lifting means, as applicable, as they travel upwardly. In an embodiment wherein the or each guide column is a pair of spaced beams and 5 said vertically spaced apart horizontal elements are bars extending across the space between the beams. Preferably, two guide columns are provided, however there may be additional guide columns or other vertical support columns, such as I-beams. The safety means may include a one-way rotational arm that is prevented from pivoting 10 downwardly from a rest position but is capable of supporting the load of the screen assembly by engaging under one of the horizontal bars of the guide column, the arm being able to rotate upwardly such that, upon lifting of the screen assembly, the horizontal members are free to push past the arm. The bottom of the arm may include a chamfer to assist the horizontal bars to push past. If, whilst lifting, the lifting means 15 fail, the arm will prevent the screen assembly falling past it as it engages under a respective horizontal bar. Typically, the first support member is a needle beam, and the second support members are needle beams. The invention also provides a method for lifting the screen assembly of the 20 aforementioned perimeter screening system, comprising: retracting said other of the second support members towards the screen assembly; operating the lifting means to lift the screen assembly, while said safety means interacts with said guide column so as to receive the load of the screen assembly by 25 engaging under one of the horizontal elements in the event of failure of said lifting means during lifting of the screen assembly; WO 2009/062243 PCT/AU2008/001683 5 retracting the first support member towards the lifting means; and retracting the lifting means upwardly. According to another aspect of the invention, there is provided a support and guidance 5 assembly for a screen assembly including at least one perimeter screen for a multi-level building, the screen assembly being moveable from a first floor to a second floor, the assembly including: a longitudinal beam having a first end and a second end; connection means at or adjacent the first end for detachably connecting the 10 beam to said first floor with the beam extending across the floor to the screen assembly beyond the edge of the floor; a roller mechanism at the second end of the beam for preventing lateral movement of the screen assembly whilst stationary and whilst being raised from the first floor to the second floor; and 15 support means at the second end of the beam for supporting the weight of the screen assembly whilst stationary, the support means being further capable of receiving the load of the screen assembly in the event of a failure of a lifting means during movement of the screen assembly from the first floor to the second floor. Advantageously, whilst lifting of the screen assembly is occurring, safety means is 20 provided that is capable of receiving the load of the screen assembly in the event of failure of the lifting means during lifting. The safety means allows the screen assembly to be lifted past and may be provided by the support beam. Preferably, the screen assembly includes multiple perimeter screens connected in series side by side.
WO 2009/062243 PCT/AU2008/001683 6 As used herein, except where the context requires otherwise the term "comprise" and variations of the term, such as "comprising", "comprises" and "comprised", are not intended to exclude other additives, components, integers or steps. Brief description of the drawings 5 The invention will now be described, by way of example only, with reference to the accompanying drawings, in which: Figure 1 is a floor plan of a typical building using a perimeter screening system according to the present invention; Figure 2 is a plan view of a section of the perimeter screening system according to the 10 present invention; Figure 3 is a sectional side elevation of the perimeter screening system at a guide beam location through line 3-3 of Figure 2; Figure 4 is a sectional side elevation similar to Figure 3 of the perimeter screening system at a hydraulic ram location through line 4-4 of Figure 2; 15 Figure 5 is a sectional side elevation of the perimeter screening system at a guide beam location through line 5-5 of Figure 2; Figure 6 is a sectional side elevation of the perimeter screening system similar to Figure 3 prior to lifting; Figure 7 is a partial sectional side view corresponding to Figure 3; 20 Figure 8 is a partial sectional side view corresponding to Figure 4; Figure 9 is a partial sectional side view corresponding to Figure 5; Figure 10 is a partial sectional side view corresponding to Figure 6; WO 2009/062243 PCT/AU2008/001683 7 Figure 11 is a sectional side elevation of a portion of the upper I-beam and vertical column connection with the support beam; and Figure 12 is a sectional side elevation of a portion of the lower I-beam and vertical column. 5 Detailed description of the embodiments Figure 1 shows a floor plan of a multi-level building 10 that is under construction. The concrete floor 12 is poured in zones 1, 2, and 3, the boundaries of which are shown by dashed line 14. Zone 1 has been poured and has now set, zone 2 is currently drying and zone 3 has just been poured. 10 Perimeter screens 16 are located around the perimeter of the floor to enclose the working area for safety and to protect workers and equipment against wind loads. The perimeter screens 16 extend above to the next floor 18 where the concrete floor is currently being poured, in corresponding zone 1, and to one or two floors below 20, 22, where workers are still constructing the floor including the installation of wall cladding, 15 which then negates the need for perimeter screens. When zone 1 on the next floor 18 has set, the perimeter screens 16 are lifted up a floor to protect the new floors being constructed. The present invention provides a perimeter screening system 30 that includes a screen assembly 32. The screen assembly 32 includes at least one perimeter screen 16. In the 20 embodiment illustrated in the drawings the screen assembly 32 includes multiple perimeter screens 16, between three and five, connected together in series side by side, as shown in Figures 1 and 2. The perimeter screens 16 are connected together by horizontal beams 34, 35. Lifting means, such as hydraulic rams 36, are connected to the screen assembly 32 to 25 lift the screen assembly from the first floor 12 to the second floor 18. It will be appreciated that alternate lifting means, such as an electric screw jack, may be used.
WO 2009/062243 PCT/AU2008/001683 8 The perimeter screening system 30, as shown in Figures 1 and 2, includes support members in the form of beams, respectively ram support beams 44 comprising first support members, and inner beams 38 and outer beams 39 comprising second support members. Beams 38,39 are fitted in spaced pairs toward either end of the screen 5 assembly 32. These beams 38, 39, functionally known as needle beams, are detachably mounted at a first end 40 and extend along the floor 12 to connect with the screen assembly 32 at a second end 42. The beams 38, 39 support the weight of the screen assembly 32 whilst stationary. Each ram support beam 44 is pivotally connected to a ram 36, is detachably connectable to the first floor 12 and provides a bearing point 10 for lifting the screen assembly 32 from the first floor 12 to the second floor 18. Two rams 36 and ram support beams 44 are provided in the illustrated embodiment, and are spaced from and located between the pairs of support beams 38, 39, when viewed in plan as shown in Figure 2. The support beams 38, 39 and the ram support beams 44 are detachably connected via tie down brackets 45 into the concrete floor 12. Beams 39 15 are pivotally retractable towards screen assembly 32, and each beam 44 is pivotably retractable towards its ram 36. It will be appreciated that a single lifting means may be provided, however it is preferable to provide at least two to ensure stability. The perimeter screens 16 are connected to upright members 46 which have upper and 20 lower right angle brackets 48 attached thereto. Connected to the right angle brackets 48 are the horizontal beams 34, 35. The horizontal beams 34, 35, best shown in Figures 11 and 12, are transverse I-beams. Extending between the upper and lower horizontal beams 34, 35 are four vertically extending guide columns 50. Each guide column 50 aligns with a support beam 38. It will be appreciate that only two guide columns may be 25 present, those aligning with the inner support beams 38. Vertical support columns, such as I-beams may be provided to align with the outer support beams 39. The guide columns 50 are pairs of spaced beams, such as back-to-back channels 52, and include a plurality of vertically spaced apart horizontal elements, in this case bars 54, extending across the space between the channels 52: this can be seen in Figure 2. 30 The second end 42 of the support beam 38, 39 includes a one-way rotational arm 56 WO 2009/062243 PCT/AU2008/001683 9 that is prevented from pivoting downwardly and therefore is capable of supporting the load of the screen assembly 32 by engaging under one of the horizontal bars 54 on the guide column 50. The arm 56 includes a hooked portion 58 to positively receive the horizontal bars 54. 5 The one-way rotational arm 56 also provides a safety means. As the arm 56 is able to rotate upwardly, as the screen assembly 32 is lifted, the horizontal bars 54 on the guide column push past the arm 56. A chamfer 64 on the underside of the arm assists this. Some or all of the support beams 38, 39 may therefore be left in place during lifting of the screen assembly 32 to provide a secondary support should the ram 36 fail during 10 lifting. If the ram 36 fails, the screen assembly will fall until the rotational arm 56 catches under the next horizontal bar 54. As the horizontal bars 54 are preferably spaced approximately 300mm apart, the furthest the screen assembly 32 will fall is 300mm. The second end 42 of the support beam 38, 39 also includes a roller mechanism 60 with two rollers 62 that engage around the edge of one of the channels 52 of the guide 15 column 50, shown best in Figures 2 and 11. The roller mechanisms 60 prevent lateral movement of the screen assembly 32 and the screen assembly is guided by the rollers 62 as it is lifted. The roller mechanism 60 removes the drag effect of other types of connections. The hydraulic ram 36 includes a first component 66, which is detachably connected to 20 the first floor 12 via the ram support beam 44, and a second component 68 that is slidably received in the first component 66. The second component 68 is connected to the screen assembly 32 by being fixed to the upper horizontal beam 35. A diagonal brace 74 is provided between the ram 36 and the floor 12 to provide additional support, particularly whilst lifting. Push/pull diagonal props 75 are also provided in line with the 25 support beams 38, 39. Under strong wind conditions, the screen assembly is prevented from inward movement by a bumper arrangement 70 that abuts against the lower floor 22. Also at floor 22, a pair of temporary tie rods 72 are clipped into place to prevent the screen being blown WO 2009/062243 PCT/AU2008/001683 10 out from the building. It will be appreciated that the tie rods may be both tensile and compressive and therefore the bumper arrangement 70 will not be required. Figures 3 and 7 show the configuration of the assembly when stationary and in use for screening floor 12. When the perimeter screens are to be lifted or "jumped" to the next 5 floor 18, two additional support beams 76 are fitted to the floor 18, as shown in Figures 6 and 10. These beams 76 are positioned over the inner two beams 38 of the screen assembly 32. The tie rods 72 on floor 22 are released and the outer push/pull props 75 are released and folded against the guide columns 50. The ram 36 is loaded with sufficient pressure to take the load off the support beams 38, 39. The two outer support 10 beams 39 are folded up against the guide beam 50 and fixed into place so they are able to move with the screen assembly 32, as shown in Figures 5 and 9. The two inner beams 38 are left in place on floor 12. The two inner push/pull props are then released. Full pressure is then applied to the ram 36 and the second component 68 is extended away from the first component 66, with the load being borne by the ram support beam 15 44 through to the first floor 12. As the screen assembly is lifted, the one-way pivoting arms 56 on the remaining support beams 38 swing upwardly and drop back to their horizontal position as the horizontal bars 54 on the guide column 50 move past. Whilst lifting, the guide column 50 is guided by the roller mechanism 60 preventing lateral movement of the screen assembly 32. 20 When the screen assembly 32 reaches its new position it is slightly above the required level. The screen assembly will settle down onto the next horizontal bars 54. The two outer support beams 39 carried by the screen assembly 32 are swung down and bolted into place on the newly poured floor 18. The push/pull props 75 are refitted, as are the tie rods 72. 25 As shown in Figures 4 and 8, the ram support beams 44 are pivotally connected to the ram 36 so that they can be folded up and fixed against the first component 66 of the ram 36. The diagonal brace 74 is released and is preferably also fixed against the first component 66. Once the screen assembly 32 is fully secured to the floor 18, the first component 66 is retracted to the second component 68 lifting the ram support beam 44 WO 2009/062243 PCT/AU2008/001683 11 and the diagonal brace 74 with it. These are then fixed to the new floor 18 before re jumping to a floor above. At leisure, the workers can unbolt and remove the two support beams 38 from floor 12 and carry them up two floors for installation prior to the next jumping operation. This can 5 be done once all of the screen assemblies on floor 12 have been jumped up to the next floor, resulting in twenty support beams 38 on floor 12 being manually carried. This is in contrast to the seventy-four that would have needed to be manually carried for the illustrated floor by the prior art system. As a perimeter screen is typically raised every five to seven days, the reduction in 10 manual labour and time taken to the lift the perimeter screens on a floor is significant. Instead of jumping one perimeter screen in an hour, a screen assembly of multiple perimeter screens, such as five, can be jumped in the same time. Given that a floor may include around over thirty perimeter screens, the time saved is substantial. It will be understood that the invention disclosed and defined in this specification 15 extends to all alternative combinations of two or more of the individual features mentioned or evident from the text or drawings. All of these different combinations constitute various alternative aspects of the invention.

Claims (16)

1. A perimeter screening system for a multi-level building, comprising: a screen assembly including at least one perimeter screen; lifting means connected to the assembly and fitted with a first support member 5 detachably connectable to a floor of the building to provide a bearing point for lifting the screen assembly to another floor; a pair of second support members laterally spaced from the first support member and each detachably connectable to a floor for receiving the load of the screen assembly whilst the screen assembly is in a stationary position; 10 at least one vertical guide column connected to the screen assembly and having a plurality of vertically spaced apart horizontal elements; and safety means fitted to at least one of the second support members and interacting with said at least one vertical guide column so as to allow the screen assembly and guide column to be lifted past but to receive the load of the screen 15 assembly by engaging under one of the horizontal elements in the event of failure of said lifting means during said lifting of the screen assembly; wherein at least another of the second support members is retractable towards the screen assembly to travel with the screen assembly past a next floor during said lifting of the screen assembly, and said first support member is retractable towards the 20 lifting means to travel with the lifting means past a next floor as it is retracted upwardly.
2. A perimeter screening system according to claim 1 wherein the first support member is spaced from and between the second support members when viewed in plan.
3. A perimeter screening system according to claim I wherein the screen assembly 25 includes multiple perimeter screens connected in series side by side. WO 2009/062243 PCT/AU2008/001683 13
4. A perimeter screening system according to claim 3 wherein there are at least two of said first support member, at least two of said guide columns, and at least two pairs of said second support members, and wherein the first support members are between the second support members of the respective pairs when viewed in plan.
5 5. A perimeter screening system according to any one of claims 1 to 4 wherein said retractable first and second support members are pivotally retractable.
6. A perimeter screening system according to any one of claims 1 to 5 wherein said lifting means is a hydraulic ram apparatus.
7. A perimeter screening system according to any one of claims 1 to 5 wherein said 10 lifting means is a screw jack.
8. A perimeter screening system according to any one of claims I to 7 wherein the or each guide column slidably engages the respective second support members to prevent lateral movement of the screen assembly.
9. A perimeter screening system according to claim 8 wherein the slidable 15 engagement includes a roller mechanism at an end of the beam for preventing lateral movement of the screen assembly whilst stationary and whilst being raised from a first floor to a second floor.
10. A perimeter screening system according to any one of claims 1 to 9 further including support props and/or braces associated with the first and first support 20 members, which props and/or braces are retractable to travel with the screen assembly or lifting means, as applicable, as they travel upwardly.
11. A perimeter screening system according to any one of claims 1 to 10 wherein the screen assembly includes multiple perimeter screens connected in series side by side by at least one horizontal beam or truss assembly and wherein said lifting means and 25 guide column(s) are affixed to said at least horizontal beam or truss assembly. WO 2009/062243 PCT/AU2008/001683 14
12. A perimeter screening system according to any one of claims 1 to 11 wherein the or each guide column is a pair of spaced beams and said vertically spaced apart horizontal elements are bars extending across the space between the beams.
13. A perimeter screening system according to any one of claims 1 to 12 wherein 5 said safety means includes a one-way rotational arm that is prevented from pivoting downwardly from a rest position but is capable of supporting the load of the screen assembly by engaging under one of the horizontal bars of the guide column, the arm being able to rotate upwardly such that, upon lifting of the screen assembly, said horizontal members are free to push past the arm. 10
14. A perimeter screening system according to any one of claims 1 13 wherein said first support member is a needle beam.
15. A perimeter screening system according to any one of claims 1 to 14 wherein said second support members are needle beams.
16. A method for lifting the screen assembly of the perimeter screening system of 15 any one of claims 1 to 15, comprising: retracting said other of the second support members towards the screen assembly; operating the lifting means to lift the screen assembly, while said safety means interacts with said guide column so as to receive the load of the screen assembly by 20 engaging under one of the horizontal elements in the event of failure of said lifting means during lifting of the screen assembly; retracting the first support member towards the lifting means; and retracting the lifting means upwardly.
AU2008323613A 2007-11-13 2008-11-13 Perimeter screening system Abandoned AU2008323613A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU2007906226 2007-11-13
AU2007906226A AU2007906226A0 (en) 2007-11-13 Perimeter screening system
AU2008323613A AU2008323613A1 (en) 2007-11-13 2008-11-13 Perimeter screening system
PCT/AU2008/001683 WO2009062243A1 (en) 2007-11-13 2008-11-13 Perimeter screening system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU2008323613A AU2008323613A1 (en) 2007-11-13 2008-11-13 Perimeter screening system

Publications (1)

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AU2008323613A1 true AU2008323613A1 (en) 2009-05-22

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AU2008323613A Abandoned AU2008323613A1 (en) 2007-11-13 2008-11-13 Perimeter screening system

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WO (1) WO2009062243A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2482314B (en) 2010-07-29 2012-06-13 Harsco Infrastructure Services Ltd A climbing screen support system
AU2012255623B2 (en) * 2011-05-19 2014-09-18 Natform Pty Ltd A lifting apparatus for a safety screen
GB2491193B (en) * 2011-05-27 2017-06-07 Harsco Infrastructure Uk Ltd A perimeter screen system
WO2019162890A1 (en) * 2018-02-21 2019-08-29 Gregory John Neighbours Improved screen system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4129197A (en) * 1975-08-13 1978-12-12 Preston John C Safety-catch scaffolding system
US4892169A (en) * 1989-02-21 1990-01-09 Sinco, Inc. Perimeter debris net lifting system
AU2003254411C1 (en) * 2002-08-29 2017-02-16 Formula One Self Driving Screens Pty Ltd A lifting or transporting means using a reciprocating jack

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MK1 Application lapsed section 142(2)(a) - no request for examination in relevant period